Circuit/System Testing
WARNING: This page is about a different variant/trim than selected.
NOTE:
Additional DTCs will set when disconnecting the components.
- Ignition OFF, disconnect the harness connector at all appropriate sensors for the applicable DTC. Refer to Diagnostic Aids .
- Ignition ON.
- Test for 4.8 - 5.2 V between one of the 5V reference circuits and ground.
- If less than 4.8 V
- Ignition OFF, disconnect the harness connectors at the K20 Engine Control Module.
- Test for infinite resistance between the 5V reference circuit for each applicable component and ground.
- If less than infinite resistance, repair the short to ground on the circuit.
- If infinite resistance, replace the K20 Engine Control Module.
- If greater than 5.2 V
- Ignition OFF, disconnect the harness connectors at the K20 Engine Control Module.
- Test for less than 1 V between the 5V reference circuit for each applicable component and ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- If less than 1 V, replace the K20 Engine Control Module.
- Go to next step: If between 4.8 - 5.2 V
- Verify the appropriate scan tool 5V Reference 1, 2, 3, 4 or 5 Circuit Status parameter displays OK while connecting each component associated with the 5V reference circuit one at a time.
- If OK is not displayed when a component is connected
Test the signal circuit of the component for a short to ground or voltage. If the circuit tests normal, replace the component.
- Go to next step: If OK is displayed after all components have been connected
- If OK is not displayed when a component is connected
- All OK.
NOTE:
A short to voltage or ground on the signal circuit of certain components may cause this DTC to set.