P1510

Diagnostic Chart:

Wiring Diagram:

Circuit Description

Battery voltage is supplied for DTC memory. Values for engine controls learned by the PCM are kept in the PCM's memory even when the ignition is turned off.


Conditions for Setting the DTC

- No back-up power supply to the PCM.

- Engine running.

- The above conditions are met for 5 seconds or more.


Action Taken When the DTC Sets


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


Conditions for Clearing the MIL/DTC

- The MIL will turn off after three consecutive drive cycles without a fault present.

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

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

Diagnostic Aids

Check for the following conditions:


- A poor connection or a damaged wiring harness. or damaged harness. Inspect the wiring harness for damage and repair as necessary.

Check fuses for being blown. Replace fuses and retest fuses.

The PCM will indicate a DTC PP1510as 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 Diagrams/Electrical.


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. Check for voltage at the PCM when The ignition is off. The PCM should indicate battery voltage on this terminal under all operating conditions.