P1510

Diagnostic Chart:

Wiring Diagram:

Circuit Description

Battery voltage is supplied for DTC memory, values for engine controls learned by the PCM, etc. are kept in the PCM's memory even when the key is turned OFF.


Conditions for Setting the DTC

^ No back-up power supply to the PCM.

^ Continuous for 5 seconds.


Action Taken When the DTC Sets

The Malfunction Indicator Lamp (MIL) will illuminate and the PCM will store DTC P1510 as long as the key is not turned OFF.


Conditions for Clearing the MIL/DTC

^ The MIL will turn OFF after three consecutively passing cycles without a fault present.

^ A History DTC will clear after 40 consecutive warm-up cycles without a fault.

^ DTCs can be cleared by using a scan tool or by disconnecting the PCM battery feed.


Diagnostic Aids

Check for any of the following conditions:


^ A poor connection at the PCM. Inspect the harness connectors for backed out terminal, improper mating, broken locks, improperly formed or damaged terminals, and a poor terminal to wire connection.

^ A damaged wiring harness. Inspect the wiring harness for damage and repair as necessary.

^ Check for blown fuses. Replace any blown fuses and retest.

The PCM will indicate a DTC P1510 as long as the ignition is ON. As soon as the ignition is turned OFF the PCM will lose its memory of a DTC P1510 and a DTC P1510 will not be stored.

If any wiring repairs need to be made, Refer to Repair Procedures in Electrical Diagrams.


Test Description

The numbers below refer to the step numbers in the Diagnostic Table.

1. The Powertrain OBD System Check prompts the technician to complete some basic checks and store the freeze frame data on the scan tool if applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored in the scan tool for later reference.

2. Determine if a fault is present.

3. Checks for voltage at the PCM when the key is OFF. The PCM should indicate battery voltage on this terminal under all operating conditions.