DTC P0641-P0643, P0651-P0653, or P0697-P0699 (ECM) |
Diagnostic Instructions |
• |
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• |
Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• |
Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptors |
Circuit/System Description |
Conditions for Running the DTC |
• |
The ignition is ON for greater than 3 s. |
• |
DTCs P0641, P0642, P0643, P0651, P0652, P0653, P0697, P0698, and P0699 run continuously when the above condition is met. |
Conditions for Setting the DTC |
Action Taken When the DTC Sets |
Conditions for Clearing the DTC |
Diagnostic Aids |
• |
Turbocharger pressure sensor |
• |
Secondary air injection pressure sensor |
• |
Engine oil pressure sensor |
• |
Clutch pedal position (CPP) sensor, if equipped |
• |
All four camshaft position sensors |
• |
Accelerator pedal position (APP) sensor 1 |
• |
Throttle position sensor 1 and 2 |
• |
Crankshaft Position Sensor |
• |
Accelerator pedal position (APP) sensor 2 |
• |
A/C refrigerant pressure sensor |
Reference Information |
• |
Circuit Testing |
• |
Connector Repairs |
• |
Testing for Intermittent Conditions and Poor Connections |
• |
Wiring Repairs |
Circuit/System Verification |
1. |
Ignition ON, check the diagnostic trouble code (DTC) information with a scan tool. Diagnostic trouble codes P0641, P0642, P0643, P0651, P0652, P0653, P0697, P0698 or P0699 must not be generated. |
2. |
Observe the scan tool status parameters for 5 V reference circuit 1, 2, or 3. The parameter should display OK. |
3. |
Operate the vehicle within the conditions for running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data. |
Circuit/System Testing |
1. |
Ignition OFF, disconnect the harness connector of all appropriate sensors for the applicable DTC. Refer to Diagnostic Aids. |
2. |
Ignition ON, test for 4.8-5.2 V between one of the affected 5 V reference circuits and ground. |
3. |
If the voltage is less than the specified range, test for a short to ground on the 5 V reference circuit for each of the affected components. If the circuit test normal, replace the K20 ECM. |
4. |
If the voltage is greater than the specified range, test for a short to voltage on the 5 V reference circuit for each of the affected components. If the circuit test normal, replace the K20 ECM. |
5. |
Connect each component associated with the affected 5 V reference circuit one at a time while monitoring the appropriate scan tool 5 V Reference Voltage parameter. Verify the voltage remains between 4.8-5.2 V. |
6. |
If not the specified range when a component is connected, test the signal circuit of that component for a short to voltage. If the circuit tests normal, replace the component. |
Repair Instructions |
• |
Accelerator Pedal Position Sensor Replacement |
• |
Air Conditioning (A/C) Refrigerant Pressure Sensor Replacement (LDK/A20NHT) Air Conditioning (A/C) Refrigerant Pressure Sensor Replacement (Diesel) Air Conditioning (A/C) Refrigerant Pressure Sensor Replacement (LAU/A28NER)
|
• |
Turbocharger Pressure Sensor Replacement |
• |
Secondary Air Injection Pump Pipe Replacement for secondary air injection pressure sensor replacement |
• |
Camshaft Position Sensor Replacement - Bank 1 (Right Side) Intake |
• |
Camshaft Position Sensor Replacement - Bank 1 (Right Side) Exhaust |
• |
Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake |
• |
Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust |
• |
Crankshaft Position Sensor Replacement |
• |
Engine Oil Pressure Sensor Replacement |
• |
Secondary Air Injection Pump Pipe Replacement |
• |
Throttle Body Assembly Replacement |
• |
Turbocharger Pressure Sensor Replacement |
• |
Control Module References for ECM replacement, setup, and programming |