2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1943
1. Verify that OSS DTCs P0721, P0722, or P0723 are not set in the TCM.
瀚慖f any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code
Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).
2. Verify that ABS DTCs C0035-C0050, C1207-C1210, C1221-C1228, C1232-C1235, C005A, C0245, or C122E are not set in the electronic
brake control module (EBCM).
瀚慖f any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code
Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).
3. Inspect the OSS, harness, and connector pins for metallic debris and the hybrid direct, 2-3-4 clutch housing assembly machined teeth for
damage or misalignment. Even one bent or misaligned tooth, and or contact with the OSS, may cause this DTC to set. Proper torque of 9-13
Nm (80-115 lb in) to the OSS mounting bolt is critical to proper OSS operation. The hybrid system is very sensitive to the OSS signal for
overall operation.
瀚慖f damage is observed, replace the damaged component.
4. Program the control module which set the DTC with the latest software version and retest for DTCs.
瀚慖f the DTC resets, replace the control module which set the DTC.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Output Speed Sensor Replacement (See: Powertrain Management/Transmission Control Systems/Sensors and Switches - Transmission and
Drivetrain/Sensors and Switches - A/T/Transmission Speed Sensor/Service and Repair/2ML70 - Automatic Transmission) for OSS
replacement.
* Rear Case and Gasket Replacement (4WD) ()Rear Case and Gasket Replacement (2WD) () for hybrid direct, 2-3-4 clutch housing
assembly replacement.
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM or HPCM replacement, setup, and
programming.
6L50/6L80/6L90 - Automatic Transmission
DTC P0218
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptor
DTC P0218
- Transmission Fluid Overtemperature
Circuit/System Description
The primary source of heat in the transmission is the torque converter. Hot oil exits the torque converter through the torque converter clutch (TCC)
control valve and flows to the transmission cooler supply line. The supply line connects to the cooler, which is in the radiator. From the cooler, the
oil returns through the oil cooler return line and enters the lubrication circuits. After lubricating the internal components, the oil returns to the oil
pan. The transmission fluid temperature (TFT) sensor is located in the control solenoid valve assembly which has no serviceable parts.
Conditions for Running the DTC
* Ignition voltage is 8.6 volts or greater.
* The TFT is -39 to +149掳C (-38 to +300掳F) for 5 seconds.
Conditions for Setting the DTC
The TFT is greater than 140掳C (284掳F) for 1 minute.
Showing posts with label P0722. Show all posts
Showing posts with label P0722. Show all posts
Sunday, November 8, 2020
Saturday, June 27, 2020
2010 Cadillac Truck Escalade RWD V8-6.2L Page 1943
2010 Cadillac Truck Escalade RWD V8-6.2L Page 1943
1. Verify that OSS DTCs P0721, P0722, or P0723 are not set in the TCM.
瀚慖f any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code
Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).
2. Verify that ABS DTCs C0035-C0050, C1207-C1210, C1221-C1228, C1232-C1235, C005A, C0245, or C122E are not set in the electronic
brake control module (EBCM).
瀚慖f any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code
Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).
3. Inspect the OSS, harness, and connector pins for metallic debris and the hybrid direct, 2-3-4 clutch housing assembly machined teeth for
damage or misalignment. Even one bent or misaligned tooth, and or contact with the OSS, may cause this DTC to set. Proper torque of 9-13
Nm (80-115 lb in) to the OSS mounting bolt is critical to proper OSS operation. The hybrid system is very sensitive to the OSS signal for
overall operation.
瀚慖f damage is observed, replace the damaged component.
4. Program the control module which set the DTC with the latest software version and retest for DTCs.
瀚慖f the DTC resets, replace the control module which set the DTC.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Output Speed Sensor Replacement (See: Powertrain Management/Transmission Control Systems/Sensors and Switches - Transmission and
Drivetrain/Sensors and Switches - A/T/Transmission Speed Sensor/Service and Repair/2ML70 - Automatic Transmission) for OSS
replacement.
* Rear Case and Gasket Replacement (4WD) ()Rear Case and Gasket Replacement (2WD) () for hybrid direct, 2-3-4 clutch housing
assembly replacement.
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM or HPCM replacement, setup, and
programming.
6L50/6L80/6L90 - Automatic Transmission
DTC P0218
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptor
DTC P0218
- Transmission Fluid Overtemperature
Circuit/System Description
The primary source of heat in the transmission is the torque converter. Hot oil exits the torque converter through the torque converter clutch (TCC)
control valve and flows to the transmission cooler supply line. The supply line connects to the cooler, which is in the radiator. From the cooler, the
oil returns through the oil cooler return line and enters the lubrication circuits. After lubricating the internal components, the oil returns to the oil
pan. The transmission fluid temperature (TFT) sensor is located in the control solenoid valve assembly which has no serviceable parts.
Conditions for Running the DTC
* Ignition voltage is 8.6 volts or greater.
* The TFT is -39 to +149掳C (-38 to +300掳F) for 5 seconds.
Conditions for Setting the DTC
The TFT is greater than 140掳C (284掳F) for 1 minute.
1. Verify that OSS DTCs P0721, P0722, or P0723 are not set in the TCM.
瀚慖f any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code
Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).
2. Verify that ABS DTCs C0035-C0050, C1207-C1210, C1221-C1228, C1232-C1235, C005A, C0245, or C122E are not set in the electronic
brake control module (EBCM).
瀚慖f any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code
Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).
3. Inspect the OSS, harness, and connector pins for metallic debris and the hybrid direct, 2-3-4 clutch housing assembly machined teeth for
damage or misalignment. Even one bent or misaligned tooth, and or contact with the OSS, may cause this DTC to set. Proper torque of 9-13
Nm (80-115 lb in) to the OSS mounting bolt is critical to proper OSS operation. The hybrid system is very sensitive to the OSS signal for
overall operation.
瀚慖f damage is observed, replace the damaged component.
4. Program the control module which set the DTC with the latest software version and retest for DTCs.
瀚慖f the DTC resets, replace the control module which set the DTC.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Output Speed Sensor Replacement (See: Powertrain Management/Transmission Control Systems/Sensors and Switches - Transmission and
Drivetrain/Sensors and Switches - A/T/Transmission Speed Sensor/Service and Repair/2ML70 - Automatic Transmission) for OSS
replacement.
* Rear Case and Gasket Replacement (4WD) ()Rear Case and Gasket Replacement (2WD) () for hybrid direct, 2-3-4 clutch housing
assembly replacement.
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM or HPCM replacement, setup, and
programming.
6L50/6L80/6L90 - Automatic Transmission
DTC P0218
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptor
DTC P0218
- Transmission Fluid Overtemperature
Circuit/System Description
The primary source of heat in the transmission is the torque converter. Hot oil exits the torque converter through the torque converter clutch (TCC)
control valve and flows to the transmission cooler supply line. The supply line connects to the cooler, which is in the radiator. From the cooler, the
oil returns through the oil cooler return line and enters the lubrication circuits. After lubricating the internal components, the oil returns to the oil
pan. The transmission fluid temperature (TFT) sensor is located in the control solenoid valve assembly which has no serviceable parts.
Conditions for Running the DTC
* Ignition voltage is 8.6 volts or greater.
* The TFT is -39 to +149掳C (-38 to +300掳F) for 5 seconds.
Conditions for Setting the DTC
The TFT is greater than 140掳C (284掳F) for 1 minute.
Wednesday, February 26, 2020
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2638
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2638
P0722
* No OSS DTCs P0721 or P0723.
* The selected range is not PARK or NEUTRAL.
* The vehicle speed is greater than 16 km/h (10 mph).
P0723
* No Automatic Transmission Output Shaft Speed Sensor DTCs P0721 or P0722.
* The engine run time is greater than 6 seconds.
Conditions for Setting the DTC
P0721
The transmission control module detects an invalid Automatic Transmission Output Shaft Speed Sensor direction.
P0722
* The transmission control module detects no signal from the Automatic Transmission Output Shaft Speed Sensor.
* The transmission output speed is less than 50 RPM for 1.5 seconds.
P0723
* The transmission control module detects an unrealistic signal drop from the Automatic Transmission Output Shaft Speed Sensor.
* Automatic Transmission Output Shaft Speed Sensor DTC P0723 has not failed this ignition.
* The transmission output speed is 1,000 RPM or greater for 6 seconds.
* The transmission output speed drops 1,300 RPM for greater than 4 seconds and does not recover.
Action Taken When the DTC Sets
P0721
The transmission control module calculates vehicle direction.
P0722 and P0723
The transmission control module calculates vehicle speed based on the wheel speed sensors.
Conditions for Clearing the DTC
* P0723 is a Type A DTC.
* P0721 and P0722 are a Type B DTC.
Diagnostic Aids
Inspect the Automatic Transmission Output Shaft Speed Sensor, harness, and connector pins for metallic debris and the hybrid direct, 2-3-4 clutch
housing assembly machined teeth for damage or misalignment. Even one bent or misaligned tooth, and or contact with the Automatic Transmission
Output Shaft Speed Sensor, may cause this DTC to set. Proper torque of 9-13 Nm (80-115 lb in) to the Automatic Transmission Output Shaft
Speed Sensor mounting bolt is critical to proper Automatic Transmission Output Shaft Speed Sensor operation. The hybrid system is very sensitive
to the Automatic Transmission Output Shaft Speed Sensor signal for overall operation.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
P0722
* No OSS DTCs P0721 or P0723.
* The selected range is not PARK or NEUTRAL.
* The vehicle speed is greater than 16 km/h (10 mph).
P0723
* No Automatic Transmission Output Shaft Speed Sensor DTCs P0721 or P0722.
* The engine run time is greater than 6 seconds.
Conditions for Setting the DTC
P0721
The transmission control module detects an invalid Automatic Transmission Output Shaft Speed Sensor direction.
P0722
* The transmission control module detects no signal from the Automatic Transmission Output Shaft Speed Sensor.
* The transmission output speed is less than 50 RPM for 1.5 seconds.
P0723
* The transmission control module detects an unrealistic signal drop from the Automatic Transmission Output Shaft Speed Sensor.
* Automatic Transmission Output Shaft Speed Sensor DTC P0723 has not failed this ignition.
* The transmission output speed is 1,000 RPM or greater for 6 seconds.
* The transmission output speed drops 1,300 RPM for greater than 4 seconds and does not recover.
Action Taken When the DTC Sets
P0721
The transmission control module calculates vehicle direction.
P0722 and P0723
The transmission control module calculates vehicle speed based on the wheel speed sensors.
Conditions for Clearing the DTC
* P0723 is a Type A DTC.
* P0721 and P0722 are a Type B DTC.
Diagnostic Aids
Inspect the Automatic Transmission Output Shaft Speed Sensor, harness, and connector pins for metallic debris and the hybrid direct, 2-3-4 clutch
housing assembly machined teeth for damage or misalignment. Even one bent or misaligned tooth, and or contact with the Automatic Transmission
Output Shaft Speed Sensor, may cause this DTC to set. Proper torque of 9-13 Nm (80-115 lb in) to the Automatic Transmission Output Shaft
Speed Sensor mounting bolt is critical to proper Automatic Transmission Output Shaft Speed Sensor operation. The hybrid system is very sensitive
to the Automatic Transmission Output Shaft Speed Sensor signal for overall operation.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
Monday, December 30, 2019
2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1563
2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1563
* No DTCs P0712, P0716, P0717, P0722, or P0723.
* The engine speed is greater than 400 RPM for 5 seconds.
* The ignition voltage is 8.6 volts or greater.
P0713
* No DTCs P0713, P0716, P0717, P0722, or P0723.
* The engine speed is greater than 400 RPM for 5 seconds.
* The ignition voltage is 8.6 volts or greater.
Conditions for Setting the DTC
P0711
The difference between the transmission fluid temperature (TFT) and TCM temperature and the difference between the TFT and TCM power up
temperature are both greater than 20-50掳C (36-90掳F). The temperature threshold is dependent on the average temperature of the TFT, TCM
temperature, and TCM power up temperature.
P0712
The TFT is less than -74掳C (-101掳F) for 1 minute.
P0713
The TFT is 174掳C (345掳F) or greater for 1 minute.
Action Taken When the DTC Sets
* DTCs P0711, P0712, and P0713 are Type B DTCs.
* The TCM defaults the TFT to the TCM Temperature.
Conditions for Clearing the DTC
DTCs P0711, P0712, and P0713 are Type B DTCs.
Diagnostic Aids
The transmission control module (TCM) temperature sensor is located inside of the control solenoid valve assembly and its output should resemble
that of the transmission fluid temperature (TFT) sensor's output.
Reference Information
Connector End View Reference
* Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
* Inline Harness Connector End Views (See: Diagrams/Connector Views/Multiple Junction Connector/Connector End Views By Number)
Description and Operation
Electronic Component Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and Operation/6T70/6T75 -
Automatic Transmission/Electronic Component Description) for control solenoid valve assembly
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Tuesday, December 17, 2019
2010 Cadillac Truck Escalade AWD V8-6.2L Page 2044
1. Verify that OSS DTCs P0721, P0722, or P0723 are not set in the TCM.
锟斤拷If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code
Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).
2. Verify that ABS DTCs C0035-C0050, C1207-C1210, C1221-C1228, C1232-C1235, C005A, C0245, or C122E are not set in the electronic
brake control module (EBCM).
锟斤拷If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code
Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).
3. Inspect the OSS, harness, and connector pins for metallic debris and the hybrid direct, 2-3-4 clutch housing assembly machined teeth for
damage or misalignment. Even one bent or misaligned tooth, and or contact with the OSS, may cause this DTC to set. Proper torque of 9-13
Nm (80-115 lb in) to the OSS mounting bolt is critical to proper OSS operation. The hybrid system is very sensitive to the OSS signal for
overall operation.
锟斤拷If damage is observed, replace the damaged component.
4. Program the control module which set the DTC with the latest software version and retest for DTCs.
锟斤拷If the DTC resets, replace the control module which set the DTC.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Output Speed Sensor Replacement (See: Powertrain Management/Transmission Control Systems/Sensors and Switches - Transmission and
Drivetrain/Sensors and Switches - A/T/Transmission Speed Sensor/Service and Repair/2ML70 - Automatic Transmission) for OSS
replacement.
* Rear Case and Gasket Replacement (4WD) ()Rear Case and Gasket Replacement (2WD) () for hybrid direct, 2-3-4 clutch housing
assembly replacement.
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM or HPCM replacement, setup, and
programming.
6L50/6L80/6L90 - Automatic Transmission
DTC P0218
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptor
DTC P0218
- Transmission Fluid Overtemperature
Circuit/System Description
The primary source of heat in the transmission is the torque converter. Hot oil exits the torque converter through the torque converter clutch (TCC)
control valve and flows to the transmission cooler supply line. The supply line connects to the cooler, which is in the radiator. From the cooler, the
oil returns through the oil cooler return line and enters the lubrication circuits. After lubricating the internal components, the oil returns to the oil
pan. The transmission fluid temperature (TFT) sensor is located in the control solenoid valve assembly which has no serviceable parts.
Conditions for Running the DTC
* Ignition voltage is 8.6 volts or greater.
* The TFT is -39 to +149锟斤拷C (-38 to +300锟斤拷F) for 5 seconds.
Conditions for Setting the DTC
The TFT is greater than 140锟斤拷C (284锟斤拷F) for 1 minute.
锟斤拷If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code
Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).
2. Verify that ABS DTCs C0035-C0050, C1207-C1210, C1221-C1228, C1232-C1235, C005A, C0245, or C122E are not set in the electronic
brake control module (EBCM).
锟斤拷If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code
Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).
3. Inspect the OSS, harness, and connector pins for metallic debris and the hybrid direct, 2-3-4 clutch housing assembly machined teeth for
damage or misalignment. Even one bent or misaligned tooth, and or contact with the OSS, may cause this DTC to set. Proper torque of 9-13
Nm (80-115 lb in) to the OSS mounting bolt is critical to proper OSS operation. The hybrid system is very sensitive to the OSS signal for
overall operation.
锟斤拷If damage is observed, replace the damaged component.
4. Program the control module which set the DTC with the latest software version and retest for DTCs.
锟斤拷If the DTC resets, replace the control module which set the DTC.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Output Speed Sensor Replacement (See: Powertrain Management/Transmission Control Systems/Sensors and Switches - Transmission and
Drivetrain/Sensors and Switches - A/T/Transmission Speed Sensor/Service and Repair/2ML70 - Automatic Transmission) for OSS
replacement.
* Rear Case and Gasket Replacement (4WD) ()Rear Case and Gasket Replacement (2WD) () for hybrid direct, 2-3-4 clutch housing
assembly replacement.
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM or HPCM replacement, setup, and
programming.
6L50/6L80/6L90 - Automatic Transmission
DTC P0218
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptor
DTC P0218
- Transmission Fluid Overtemperature
Circuit/System Description
The primary source of heat in the transmission is the torque converter. Hot oil exits the torque converter through the torque converter clutch (TCC)
control valve and flows to the transmission cooler supply line. The supply line connects to the cooler, which is in the radiator. From the cooler, the
oil returns through the oil cooler return line and enters the lubrication circuits. After lubricating the internal components, the oil returns to the oil
pan. The transmission fluid temperature (TFT) sensor is located in the control solenoid valve assembly which has no serviceable parts.
Conditions for Running the DTC
* Ignition voltage is 8.6 volts or greater.
* The TFT is -39 to +149锟斤拷C (-38 to +300锟斤拷F) for 5 seconds.
Conditions for Setting the DTC
The TFT is greater than 140锟斤拷C (284锟斤拷F) for 1 minute.
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