锟斤拷If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the ECM.
锟斤拷If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the ECM.
4. Verify the scan tool FTP sensor parameter is less than 0.2 volts.
锟斤拷If greater than the specified range, test the signal circuit terminal 1 for a short to voltage. If the circuit tests normal, replace the ECM.
5. Install a 3 A fused jumper wire between the signal circuit terminal 1 and the 5-volt reference circuit terminal 3. Verify the scan tool FTP
sensor parameter is greater than 4.7 volts.
锟斤拷If less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the
ECM.
6. If all circuits test normal, test or replace the FTP sensor.
Repair Instructions
* For DTC P0452 or P0453, always perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic
procedure
* For DTC P0451 or P0454, clear DTCs with a scan tool
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup and programming
P0452
DTC P0451-P0454
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 Descriptors
DTC P0451
- Fuel Tank Pressure (FTP) Sensor Performance
DTC P0452
- Fuel Tank Pressure (FTP) Sensor Circuit Low Voltage
DTC P0453
- Fuel Tank Pressure (FTP) Sensor Circuit High Voltage
DTC P0454
- Fuel Tank Pressure (FTP) Sensor Intermittent
Diagnostic Fault Information
Typical Scan Tool Data
Showing posts with label test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal. Show all posts
Showing posts with label test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal. Show all posts
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2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 511
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 511
瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the MSM.
瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM.
4. Verify the scan tool Driver Seat Recline Sensor parameter is less than 1 volt.
瀚慖f greater than the specified range, test the signal circuit terminal 2 for a short to voltage. If the circuit tests normal, replace the MSM.
5. Install a 3A fused jumper wire between the signal circuit terminal 2 and the 5-volt reference circuit terminal 3. Verify the scan tool Driver
Seat Recline Sensor parameter is greater than 4.75 volts.
瀚慖f less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the
MSM.
6. If all circuits test normal, test or replace the seat recline position sensor.
B2355 01, B2355 06, B2365 01, B2365 06, B2375 01 or B2375 06
1. Ignition OFF, disconnect the X2 harness connector at the seat adjuster assembly.
2. Test for less than 2 ohms between the low reference circuit terminal 2 and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the MSM.
3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 6 and ground.
瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the MSM.
瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM.
4. Verify the appropriate scan tool driver seat sensor parameter is less than 1 volt.
瀚慖f greater than the specified range, test the appropriate signal circuit listed below for a short to voltage. If the circuit tests normal, replace
the MSM.
* Seat front vertical position sensor terminal 1
* Seat rear vertical position sensor terminal 5
* Seat horizontal position sensor terminal 3
5. Install a 3A fused jumper wire between the appropriate signal circuit listed below and the 5-volt reference circuit terminal 6. Verify the
appropriate scan tool driver seat position sensor parameter is greater than 4.75 volts.
* Seat horizontal position sensor terminal 3
* Seat front vertical position sensor terminal 1
* Seat rear vertical position sensor terminal 5
瀚慖f less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the
MSM.
6. If all circuits test normal, test or replace the seat position sensor.
B1850 01, B1850 06, B1860 01 or B1860 06
1. Ignition OFF, disconnect the X2 harness connector at the lumbar adjuster assembly.
2. Test for less than 2 ohms between the low reference circuit terminal C and ground.
瀚慖f greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the MSM.
3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal A and ground.
瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the MSM.
瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM.
4. Verify the appropriate scan tool lumbar sensor parameter is less than 1 volt.
瀚慖f greater than the specified range, test the appropriate signal circuit listed below for a short to voltage. If the circuit tests normal, replace
the MSM.
* Lumbar vertical position sensor terminal B
* Lumbar horizontal position sensor terminal D
瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the MSM.
瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM.
4. Verify the scan tool Driver Seat Recline Sensor parameter is less than 1 volt.
瀚慖f greater than the specified range, test the signal circuit terminal 2 for a short to voltage. If the circuit tests normal, replace the MSM.
5. Install a 3A fused jumper wire between the signal circuit terminal 2 and the 5-volt reference circuit terminal 3. Verify the scan tool Driver
Seat Recline Sensor parameter is greater than 4.75 volts.
瀚慖f less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the
MSM.
6. If all circuits test normal, test or replace the seat recline position sensor.
B2355 01, B2355 06, B2365 01, B2365 06, B2375 01 or B2375 06
1. Ignition OFF, disconnect the X2 harness connector at the seat adjuster assembly.
2. Test for less than 2 ohms between the low reference circuit terminal 2 and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the MSM.
3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 6 and ground.
瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the MSM.
瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM.
4. Verify the appropriate scan tool driver seat sensor parameter is less than 1 volt.
瀚慖f greater than the specified range, test the appropriate signal circuit listed below for a short to voltage. If the circuit tests normal, replace
the MSM.
* Seat front vertical position sensor terminal 1
* Seat rear vertical position sensor terminal 5
* Seat horizontal position sensor terminal 3
5. Install a 3A fused jumper wire between the appropriate signal circuit listed below and the 5-volt reference circuit terminal 6. Verify the
appropriate scan tool driver seat position sensor parameter is greater than 4.75 volts.
* Seat horizontal position sensor terminal 3
* Seat front vertical position sensor terminal 1
* Seat rear vertical position sensor terminal 5
瀚慖f less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the
MSM.
6. If all circuits test normal, test or replace the seat position sensor.
B1850 01, B1850 06, B1860 01 or B1860 06
1. Ignition OFF, disconnect the X2 harness connector at the lumbar adjuster assembly.
2. Test for less than 2 ohms between the low reference circuit terminal C and ground.
瀚慖f greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the MSM.
3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal A and ground.
瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the MSM.
瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM.
4. Verify the appropriate scan tool lumbar sensor parameter is less than 1 volt.
瀚慖f greater than the specified range, test the appropriate signal circuit listed below for a short to voltage. If the circuit tests normal, replace
the MSM.
* Lumbar vertical position sensor terminal B
* Lumbar horizontal position sensor terminal D
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