Circuit/System Testing

P0324

• If DTC P0327 and P0328 are also set, preform those diagnostics first.
• This DTC indicates an internal control module circuitry failure. Replace the engine control module (ECM).

P0325, P0327, and P0328

1. Ignition ON, engine OFF.
2. Disconnect the KS harness connector.
3. Measure for 2-3 volts between each of the following circuits and ground on the ECM side of the harness connector.
   • The KS signal circuit, terminal A
   • The KS signal circuit, terminal B
   • If less than the specified range, test the circuits for a short to ground or an open/high resistance. If the circuits test normal, replace the ECM.
   • If greater than the specified range, test the circuits for a short to voltage. If the circuits test normal, replace the ECM.
4. If the circuits test normal, replace the KS.

P0326

IMPORTANT: If DTC P0335 or P0336 are also set, diagnose those DTCs first.
• Inspect for a loose or broken vehicle accessory or accessory bracket.
• Inspect for excessive engine mechanical noise.