For 1990-2009 cars only
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 Descriptor
DTC P164B: Fuel Pump Driver Control Module Read Only Memory (ROM)DTC P164C: Fuel Pump Driver Control Module Random Access Memory (RAM)
Circuit/System Description
The control module runs a program to detect an internal fault when power up is commanded.
Conditions for Running the DTC
Ignition ON.
Conditions for Setting the DTC
The FPCM relay has detected an internal malfunction.
Action Taken When the DTC Sets
The module may have limited functional operation depending on the severity of the calibration corruption.
Conditions for Clearing the DTC
| • | A DTC clears when the malfunction is no longer present. |
| • | A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction. |
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Electrical Information Reference
Scan Tool Reference
Refer to Fuel Pump Flow Control Module Scan Tool Information for scan tool information.
Circuit/System Verification
Verify that DTC P164B or DTC P164C is not set.
| ⇒ | If the DTC is set, replace the fuel pump control module relay. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
