2010 Cadillac Truck SRX FWD V6-3.0L Page 1964
瀚慖f greater than the specified range, test the appropriate low reference circuit for a short to voltage, or an open/high resistance. If the circuit
tests normal, replace the K20 ECM.
3. Ignition ON, test for 4.8-5.2 V between both 5-volt reference circuit terminals listed below and ground.
* 5 volt reference circuit terminal 1
* 5 volt reference circuit terminal 2
瀚慖f less than the specified range, test the appropriate 5-volt reference circuit for a short to ground or open/high resistance. If the circuit tests
normal, replace the K20 ECM.
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 K20 ECM.
4. Verify the appropriate APP sensor voltage parameter is at 0 V.
瀚慖f greater than the specified range, test the appropriate signal circuit terminal listed below for a short to voltage. If the circuit tests normal,
replace the K20 ECM.
* APP sensor 1 signal circuit terminal 3
* APP sensor 2 signal circuit terminal 6
5. Install a 3 A fused jumper wire between the appropriate signal circuit listed below and the 5-volt reference circuit terminal 1. Verify the
appropriate APP sensor voltage parameter is greater than 4.8 V.
* APP sensor 1 signal circuit terminal 3
* APP sensor 2 signal circuit terminal 6
瀚慖f less than the specified range, test the appropriate signal circuit for a short to ground or an open/high resistance. If the circuit tests
normal, replace the K20 ECM.
6. If all circuits test normal, replace the B107 accelerator pedal assembly.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Accelerator Pedal with Position Sensor Assembly Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Accelerator
Pedal/Service and Repair/Accelerator Pedal with Position Sensor Assembly Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming
P2135
DTC P0121-P0123, P0222, P0223, or P2135 (LF1, LFW)
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 P0121
- Throttle Position Sensor Performance
DTC P0122
- Throttle Position Sensor 1 Circuit Low Voltage
DTC P0123
- Throttle Position Sensor 1 Circuit High Voltage
DTC P0222
- Throttle Position Sensor 2 Circuit Low Voltage
DTC P0223
- Throttle Position Sensor 2 Circuit High Voltage
