Idle Control System

PSP Switch Signal Circuit Troubleshooting

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  1. Turn the ignition switch ON (II).
  1. Measure voltage between ECM/PCM connector terminals A24 and E16.

ECM/PCM CONNECTORS

Wire side of female terminals

Is there less than 1.0 V?

YES - Go to step 3.

NO - Go to step 6.

  1. Start the engine.
  2. Turn the steering wheel to the full lock position.
  3. Measure voltage between ECM/PCM connector terminals A24 and E16.

Is there battery voltage?

YES - The PSP switch signal is OK.

NO - Go to step 11.

  1. Turn the ignition switch OFF.
  2. Disconnect the PSP switch 2P connector.
  3. Turn the ignition switch ON (II).

  1. At the harness side, connect the PSP switch 2P connector terminals No. 1 and No. 2 with a jumper wire.

PSP SWITCH 2P CONNECTOR

Wire side of female terminals

  1. Measure voltage between ECM/PCM connector terminals A24 and E16.

Is there less than 1.0 V?

YES - Replace the PSP switch.

NO - Check for these problems:

  • An open in the wire between the ECM/PCM (E16) and the PSP switch.
  • An open in wire between the PSP switch and G201.
  1. Turn the ignition switch OFF.
  2. Disconnect the PSP switch 2P connector.
  3. Turn the ignition switch ON (II).