Circuit/System Testing: P0324
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
If DTC P0327, P0328, P0332, or P0333 are also set, diagnostics those DTCs first.
DTC P0324 indicates an internal control module circuitry failure. Replace the ECM.
P0325, P0327, P0328, P0330, P0332, P0333
- Ignition ON, engine OFF.
- Disconnect the appropriate KS harness connector.
- 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 low reference 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.
- If all circuits test normal, replace the KS.
P0326
- Inspect for a loose or broken engine mount, engine mounted accessory, or accessory mounting bracket.
- Inspect for excessive engine mechanical noise. Refer to Symptoms - Engine Mechanical .
IMPORTANT:
If DTC P0335 or P0336 are also set, diagnose those DTC first.