P0512

CIRCUIT DESCRIPTION
The powertrain control module (PCM) receives two ignition inputs from the ignition switch: IGN 0 and IGN 1. The PCM receives the Crank Request input with the ignition switch in the START position. The PCM uses a class 2 ignition mode message, and the voltage input from 2 separate systems to test the Crank Request circuit. If the PCM detects an improper input, DTC P0512 will set.

CONDITIONS FOR RUNNING THE DTC
No class 2 serial data circuit problem.

CONDITIONS FOR SETTING THE DTC
The PCM detects an improper Crank Request input.

ACTION TAKEN WHEN THE DTC SETS
- The PCM will not illuminate the Malfunction Indicator Lamp (MIL).
- The PCM will store conditions which were present when the DTC set as Fail Records information only.

CONDITIONS FOR CLEARING THE MIL/DTC
- The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
- The DTC can be cleared by using the scan tool Clear DTC Information function.

TEST

Steps 1-3:

Steps 4-10:

Steps 11-12: