Diagnostic Instructions
DTC Descriptors
DTC P0604: Control Module Random Access Memory (RAM)
DTC P0606: Control Module Internal Performance
DTC P0607: Control Module Performance
DTC P060A: Control Module Monitoring Processor Performance
DTC P060D: Control Module Accelerator Pedal Position (APP) System Performance
DTC P060E: Control Module Throttle Position (TP) System Performance
DTC P2610: Control Module Ignition Off Timer Performance
Circuit/System Description
The powertrain control module (PCM) performs continuous self checks of all internal circuits. If the status of an internal memory circuit within the control module is incorrect, a DTC P0604 sets. If the inputs or outputs from the many central processing
units (CPU) within the control module deviate from the standard level, a DTC P0606, P0607, or P060A sets. The control module monitors the accelerator pedal position (APP) sensor 1 signal and sets a DTC P060D when an internal APP sensor fault
is detected. The control module monitors the throttle position (TP) sensor 1 signal and the stop lamp switch input for synchronous activity. If a deviation is detected a DTC P060E sets. The control module has several internal clock or timer circuits.
The DTC P2610 diagnostic monitors the internal timer circuit responsible for the ignition OFF operation of the evaporative emission (EVAP) system vacuum leak pump. If the there is an error in the control module timer, a DTC P2610 sets.
Conditions for Running the DTC
P0604, P0606, P0607, P060A, P060D, and P060E
| • | The ignition is ON, or the control module is awake. |
| • | The DTCs run continuously once the above condition is met. |
P2610
| • | The engine has been running for greater than 10 minutes. |
| • | The DTC runs once an ignition cycle. |
Conditions for Setting the DTC
P0604, P0606, P0607, P060A, P060D, and P060E
The PCM detects that an internal error exists.
P2610
The PCM engine running timer and the engine soak timer do not agree.
Action Taken When the DTC Sets
| • | DTCs P0604, P0606, P0607, P060A, P060D, and P060E are type A DTCs. |
| • | DTC P2610 is a type B DTC. |
Conditions for Clearing the DTC
| • | DTCs P0604, P0606, P0607, P060A, P060D, and P060E are type A DTCs. |
| • | DTC P2610 is a type B DTC. |
Diagnostic Aids
| • | A short to ground in the 5-volt reference circuit of some engine control sensors can set a DTC P0606 or P0607. The PCM provides 5 volts to the following sensors: |
| - | Throttle position sensor (TPS) 1 and 2 |
| - | Accelerator pedal position (APP) sensor 1 and 2 |
| - | The fuel tank pressure (FTP) sensor |
| • | A low battery condition may cause DTC P2610 to set. |
| • | An intermittent condition at the ignition switch may cause DTC P2610 to set. |
Reference Information
Schematic Reference
Engine Controls Schematics
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
- Ignition ON, clear the DTC information with a scan tool. Observe the scan tool DTC information. Verify that DTC P0606 or P0607 does not fail this ignition cycle.
| ⇒ | If DTC P0606 or P0607 failed this ignition, test the PCM 5-volt reference circuit of the applicable engine sensors for a short to ground. Refer to Diagnostic Aids. If the circuits test normal, replace the PCM. |
- Observe the DTC information with a scan tool. Verify DTCs P0604, P060A, P060D, P060E, or P2610 do not set this ignition cycle.
| ⇒ | If any of the DTCs set this ignition cycle, replace the PCM. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for control module replacement, setup, and programming
