Circuit/System Testing
WARNING: This page is about a different variant/trim than selected.
- Ignition ON, clear the DTCs with a scan tool.
- Engine idling, raise the engine speed to 1,000 RPM for 30 seconds, and then return to idle. Move the related CKP harnesses and connectors between the CKP and the ECM. Verify the engine does not stall or stumble.
- If the engine stalls or stumbles, repair the harness/connections as necessary.
- Ignition OFF, inspect the CKP harness for the following:
- Routed too close to the battery or the battery cables
- Routed too close to other wiring or components
- Routed too close to after market add on electrical equipment
- Routed too close to solenoids, relays, and motors
- If a condition is located, repair as necessary.
- Disconnect the harness connector at the CKP sensor.
- Ignition ON, test for 2-3 volts between the signal circuit terminal 2 and ground.
- If less than the specified range, test the signal circuit for a short to ground, or an open/high resistance. If the circuits/connections test normal, replace the ECM.
- If greater than the specified range, test the signal circuit for a short to voltage. If the circuits/connections test normal, replace the ECM.
- Test for 2-3 volts between the low reference circuit terminal 1 and ground.
- If less than the specified range, test the low reference circuit for a short to ground or an open. If the circuit/connections test normal, replace the ECM.
- If greater than the specified range, test the low reference circuit for a short to voltage. If the circuit/connections test normal, replace the ECM.
- Remove the CKP sensor-Refer to Crankshaft Position Sensor Replacement .
- Inspect the crankshaft reluctor wheel for damage.
- If the crankshaft reluctor wheel is damaged-Refer to Crankshaft and Bearing Cleaning and Inspection , and replace the CKP sensor.
- If all circuits/connections test normal, test or replace the CKP sensor.