2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2035
The 4X camshaft position sensor circuits consist of an engine control module (ECM) supplied 5 V reference circuit, low reference circuit, and an
output signal circuit. The camshaft position sensor is an internally magnetic biased digital output integrated circuit sensing device. The sensor
detects magnetic flux changes between the peaks and valleys of a 4-tooth reluctor wheel attached to the camshaft. As each reluctor wheel tooth
rotates past the camshaft position sensor, the resulting change in the magnetic field is used by the sensor electronics to produce a digital output
pulse. The sensor returns a digital ON/OFF DC voltage pulse of varying frequency, with two narrow, and two wide output pulses per camshaft
revolution that represent an image of the camshaft reluctor wheel. The frequency of the camshaft position sensor output depends on the velocity of
the camshaft. The ECM decodes the narrow and wide tooth pattern to identify camshaft position. This information is then used to sequence the
ignition timing and fuel injection events for the engine. The ECM also uses camshaft position sensor output information to determine the camshaft
relative position to the crankshaft, to control the camshaft position actuator if equipped, and for limp-home operation.
Conditions for Running the DTC
* DTC P0641, or P0651 is not set.
* The engine is cranking or running.
* DTCs run continuously when the above conditions are met.
Conditions for Setting the DTC
Important: The ECM detects engine movement by sensing the airflow through the MAF sensor, when airflow is greater than 3 grams per
second, or by sensing crankshaft position sensor pulses.
* The ECM detects that the engine was started, but has received less than 2 or more than 8 camshaft position sensor pulses during the first
engine resolution.
* The ECM detects that the engine has started and is running, but receives less than 398 or more than 402 camshaft position pulses per 100
engine cycles in 800 of 1000 engine cycles.
Action Taken When the DTC Sets
* DTC P0341 is a Type B DTC.
* The camshaft position actuator, if equipped, is commanded to the parked position.
* The ignition system defaults to a failed camshaft position sensor limp home mode.
Conditions for Clearing the DTC
DTC P0341 is a Type B DTC.
Diagnostic Aids
* With this DTC set, the engine may crank for an extended period of time during start-up.
* This test procedure requires that the vehicle battery has passed a load test and is completely charged. Refer to Battery Inspection/Test (See:
Starting and Charging/Testing and Inspection/Component Tests and General Diagnostics/Battery Inspection/Test).
Reference Information
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Electronic Ignition System Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Electronic
Ignition System Description)
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)
Showing posts with label Low Reference circuit. Show all posts
Showing posts with label Low Reference circuit. Show all posts
Wednesday, November 11, 2020
Wednesday, July 1, 2020
2010 Cadillac Truck Escalade RWD V8-6.2L Page 2035
2010 Cadillac Truck Escalade RWD V8-6.2L Page 2035
The 4X camshaft position sensor circuits consist of an engine control module (ECM) supplied 5 V reference circuit, low reference circuit, and an
output signal circuit. The camshaft position sensor is an internally magnetic biased digital output integrated circuit sensing device. The sensor
detects magnetic flux changes between the peaks and valleys of a 4-tooth reluctor wheel attached to the camshaft. As each reluctor wheel tooth
rotates past the camshaft position sensor, the resulting change in the magnetic field is used by the sensor electronics to produce a digital output
pulse. The sensor returns a digital ON/OFF DC voltage pulse of varying frequency, with two narrow, and two wide output pulses per camshaft
revolution that represent an image of the camshaft reluctor wheel. The frequency of the camshaft position sensor output depends on the velocity of
the camshaft. The ECM decodes the narrow and wide tooth pattern to identify camshaft position. This information is then used to sequence the
ignition timing and fuel injection events for the engine. The ECM also uses camshaft position sensor output information to determine the camshaft
relative position to the crankshaft, to control the camshaft position actuator if equipped, and for limp-home operation.
Conditions for Running the DTC
* DTC P0641, or P0651 is not set.
* The engine is cranking or running.
* DTCs run continuously when the above conditions are met.
Conditions for Setting the DTC
Important: The ECM detects engine movement by sensing the airflow through the MAF sensor, when airflow is greater than 3 grams per
second, or by sensing crankshaft position sensor pulses.
* The ECM detects that the engine was started, but has received less than 2 or more than 8 camshaft position sensor pulses during the first
engine resolution.
* The ECM detects that the engine has started and is running, but receives less than 398 or more than 402 camshaft position pulses per 100
engine cycles in 800 of 1000 engine cycles.
Action Taken When the DTC Sets
* DTC P0341 is a Type B DTC.
* The camshaft position actuator, if equipped, is commanded to the parked position.
* The ignition system defaults to a failed camshaft position sensor limp home mode.
Conditions for Clearing the DTC
DTC P0341 is a Type B DTC.
Diagnostic Aids
* With this DTC set, the engine may crank for an extended period of time during start-up.
* This test procedure requires that the vehicle battery has passed a load test and is completely charged. Refer to Battery Inspection/Test (See:
Starting and Charging/Testing and Inspection/Component Tests and General Diagnostics/Battery Inspection/Test).
Reference Information
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Electronic Ignition System Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Electronic
Ignition System Description)
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)
The 4X camshaft position sensor circuits consist of an engine control module (ECM) supplied 5 V reference circuit, low reference circuit, and an
output signal circuit. The camshaft position sensor is an internally magnetic biased digital output integrated circuit sensing device. The sensor
detects magnetic flux changes between the peaks and valleys of a 4-tooth reluctor wheel attached to the camshaft. As each reluctor wheel tooth
rotates past the camshaft position sensor, the resulting change in the magnetic field is used by the sensor electronics to produce a digital output
pulse. The sensor returns a digital ON/OFF DC voltage pulse of varying frequency, with two narrow, and two wide output pulses per camshaft
revolution that represent an image of the camshaft reluctor wheel. The frequency of the camshaft position sensor output depends on the velocity of
the camshaft. The ECM decodes the narrow and wide tooth pattern to identify camshaft position. This information is then used to sequence the
ignition timing and fuel injection events for the engine. The ECM also uses camshaft position sensor output information to determine the camshaft
relative position to the crankshaft, to control the camshaft position actuator if equipped, and for limp-home operation.
Conditions for Running the DTC
* DTC P0641, or P0651 is not set.
* The engine is cranking or running.
* DTCs run continuously when the above conditions are met.
Conditions for Setting the DTC
Important: The ECM detects engine movement by sensing the airflow through the MAF sensor, when airflow is greater than 3 grams per
second, or by sensing crankshaft position sensor pulses.
* The ECM detects that the engine was started, but has received less than 2 or more than 8 camshaft position sensor pulses during the first
engine resolution.
* The ECM detects that the engine has started and is running, but receives less than 398 or more than 402 camshaft position pulses per 100
engine cycles in 800 of 1000 engine cycles.
Action Taken When the DTC Sets
* DTC P0341 is a Type B DTC.
* The camshaft position actuator, if equipped, is commanded to the parked position.
* The ignition system defaults to a failed camshaft position sensor limp home mode.
Conditions for Clearing the DTC
DTC P0341 is a Type B DTC.
Diagnostic Aids
* With this DTC set, the engine may crank for an extended period of time during start-up.
* This test procedure requires that the vehicle battery has passed a load test and is completely charged. Refer to Battery Inspection/Test (See:
Starting and Charging/Testing and Inspection/Component Tests and General Diagnostics/Battery Inspection/Test).
Reference Information
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Electronic Ignition System Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Electronic
Ignition System Description)
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)
Monday, November 18, 2019
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 931
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 931
Low Reference circuit, TCEM X1 pin H.
瀚慖f the voltage is greater than the specified range, test the low reference circuit for a short to voltage. If all circuits and connections test
normal, test the TCCM for proper operation.
瀚慖f the voltage is less than the specified range, test the low reference circuit for a short to ground, an open/high resistance or short to
voltage. If all circuits and connections test normal, test the TCCM for proper operation.
5. Using the PU probe J 35616-4A, test for 6.0-7.0 V between the incremental encoder impulse signal circuit, TCEM X1 pin E and a good
ground.
瀚慖f the voltage is greater than the specified range, test the affected circuit for a short to voltage. If all circuits and connections test normal,
test the TCCM for proper operation.
瀚慖f the voltage is less than the specified range, test the affected circuit for a short to ground, an open/high resistance or short to voltage. If
all circuits and connections test normal, test the TCCM for proper operation.
6. Using the PU probe J 35616-4A, test for 6.0-7.0 V between the incremental encoder direction signal circuit, TCEM X1 pin F and a good
ground.
瀚慖f the voltage is greater than the specified range, test the affected circuit for a short to voltage. If all circuits and connections test normal,
test the TCCM for proper operation.
瀚慖f the voltage is less than the specified range, test the affected circuit for a short to ground, an open/high resistance or short to voltage. If
all circuits and connections test normal, test the TCCM for proper operation.
7. Using the PU probe J 35616-4A, test for greater than 500 ohm between the incremental encoder sensor (8 V) supply circuit, TCEM X1 pin G
and all other pins of the TCEM X1.
瀚慖f the resistance is less than the specified range, test the affected circuits for a shorted together condition. If all circuits and connections
test normal, test the TCCM for proper operation.
8. Using the PU probe J 35616-4A, test for greater than 500 ohm between the incremental encoder impulse signal circuit, TCEM X1 pin E and
all other pins of the TCEM X1.
瀚慖f the resistance is less than the specified range, test the affected circuits for a shorted together condition. If all circuits and connections
test normal, test the TCCM for proper operation.
9. Using the PU probe J 35616-4A, test for greater than 10 ohm between the incremental encoder direction signal circuit, TCEM X1 pin F and
all other pins of the TCEM X1.
瀚慖f the resistance is less than the specified range, test the affected circuits for a shorted together condition. If all circuits and connections
test normal, test the TCCM for proper operation.
10. Using the PU probe J 35616-4A, test for greater than 10 ohm between the low reference circuit, TCEM X1 pin H and all other pins of the
TCEM X1.
瀚慖f the resistance is less than the specified range, test the affected circuits for a shorted together condition. If all circuits and connections
test normal, test the TCCM for proper operation.
11. Test the TCEM for proper operation.
Component Testing
Incremental Position Sensor
1. Set parking brake.
2. Block wheels.
3. Remove the encoder motor from transfer case. Using a paint pen or marker, place indexing marks on the shift detent lever receiver and the
mounting surface of the encoder motor.
4. Connect encoder motor to engine harness.
5. Key ON, engine OFF.
6. Transmission in Neutral.
7. Attach scan tool. Clear codes. DTC C0569-4B may remain in memory.
Note: You must perform the Transfer Case High/Low Clutch Reset (See: Transmission and Drivetrain/Transfer Case/Testing and
Inspection/Symptom Related Diagnostic Procedures/MP 3023/3024-NQH - Transfer Case/Transfer Case High/Low Clutch Reset) procedure
after performing the next step.
8. Monitor the following parameters while using the Transfer Case Motor Control function of the Special Function feature of the scan tool to
command the encoder motor forward and reverse. The parameters should display as shown.
瀚慖f the parameters do not display as described replace the encoder motor assembly.
Low Reference circuit, TCEM X1 pin H.
瀚慖f the voltage is greater than the specified range, test the low reference circuit for a short to voltage. If all circuits and connections test
normal, test the TCCM for proper operation.
瀚慖f the voltage is less than the specified range, test the low reference circuit for a short to ground, an open/high resistance or short to
voltage. If all circuits and connections test normal, test the TCCM for proper operation.
5. Using the PU probe J 35616-4A, test for 6.0-7.0 V between the incremental encoder impulse signal circuit, TCEM X1 pin E and a good
ground.
瀚慖f the voltage is greater than the specified range, test the affected circuit for a short to voltage. If all circuits and connections test normal,
test the TCCM for proper operation.
瀚慖f the voltage is less than the specified range, test the affected circuit for a short to ground, an open/high resistance or short to voltage. If
all circuits and connections test normal, test the TCCM for proper operation.
6. Using the PU probe J 35616-4A, test for 6.0-7.0 V between the incremental encoder direction signal circuit, TCEM X1 pin F and a good
ground.
瀚慖f the voltage is greater than the specified range, test the affected circuit for a short to voltage. If all circuits and connections test normal,
test the TCCM for proper operation.
瀚慖f the voltage is less than the specified range, test the affected circuit for a short to ground, an open/high resistance or short to voltage. If
all circuits and connections test normal, test the TCCM for proper operation.
7. Using the PU probe J 35616-4A, test for greater than 500 ohm between the incremental encoder sensor (8 V) supply circuit, TCEM X1 pin G
and all other pins of the TCEM X1.
瀚慖f the resistance is less than the specified range, test the affected circuits for a shorted together condition. If all circuits and connections
test normal, test the TCCM for proper operation.
8. Using the PU probe J 35616-4A, test for greater than 500 ohm between the incremental encoder impulse signal circuit, TCEM X1 pin E and
all other pins of the TCEM X1.
瀚慖f the resistance is less than the specified range, test the affected circuits for a shorted together condition. If all circuits and connections
test normal, test the TCCM for proper operation.
9. Using the PU probe J 35616-4A, test for greater than 10 ohm between the incremental encoder direction signal circuit, TCEM X1 pin F and
all other pins of the TCEM X1.
瀚慖f the resistance is less than the specified range, test the affected circuits for a shorted together condition. If all circuits and connections
test normal, test the TCCM for proper operation.
10. Using the PU probe J 35616-4A, test for greater than 10 ohm between the low reference circuit, TCEM X1 pin H and all other pins of the
TCEM X1.
瀚慖f the resistance is less than the specified range, test the affected circuits for a shorted together condition. If all circuits and connections
test normal, test the TCCM for proper operation.
11. Test the TCEM for proper operation.
Component Testing
Incremental Position Sensor
1. Set parking brake.
2. Block wheels.
3. Remove the encoder motor from transfer case. Using a paint pen or marker, place indexing marks on the shift detent lever receiver and the
mounting surface of the encoder motor.
4. Connect encoder motor to engine harness.
5. Key ON, engine OFF.
6. Transmission in Neutral.
7. Attach scan tool. Clear codes. DTC C0569-4B may remain in memory.
Note: You must perform the Transfer Case High/Low Clutch Reset (See: Transmission and Drivetrain/Transfer Case/Testing and
Inspection/Symptom Related Diagnostic Procedures/MP 3023/3024-NQH - Transfer Case/Transfer Case High/Low Clutch Reset) procedure
after performing the next step.
8. Monitor the following parameters while using the Transfer Case Motor Control function of the Special Function feature of the scan tool to
command the encoder motor forward and reverse. The parameters should display as shown.
瀚慖f the parameters do not display as described replace the encoder motor assembly.
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