Circuit/System Testing

P0324 

This DTC indicates an internal control module circuitry failure. Replace the ECM.

P0325, P0327, and P0328

1. Turn OFF the ignition.
2. Disconnect the KS.
3. Measure for infinite resistance from the KS signal circuit on the sensor side of the KS harness connector to a good ground with the DMM.
4. Measure for infinite resistance from the KS low reference circuit on the sensor side of the KS harness connector to a good ground with the DMM.
   • If the circuits are grounded, repair the short to ground.
5. Turn ON the ignition, with the engine OFF.
6. On the control module side of the KS harness connector, measure the DC voltage from the KS signal circuit to a good ground with a DMM.
7. On the control module side of the KS harness connector, measure for less than 4.2 DC volts from the KS low reference circuit to a good ground with a DMM.
   • If the KS signal circuit or the KS low reference circuit measures more than 4.2 volts, inspect for a short to voltage or a faulty controller.
8. Test the KS signal circuit and the KS low reference circuit for the following conditions:
   • An open
   • A short to ground
   • High resistance
   • If the circuits and the sensor test normal, replace the control module.

P0326

• Inspect for a loose or broken vehicle accessory or accessory bracket.
• Inspect for excessive engine mechanical noise.