Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Test Step 23 - Sensor Ground Circuit
The ground circuit must be present at both CMP and CKP sensors.
- Turn the ignition off.
- Using a test lamp connected to 12 volts, probe the sensor ground circuit in the CMP sensor harness connector.
- Repeat the above test at the CKP sensor.
The test lamp should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
Is the test lamp brightly illuminated?
Yes
- Replace both sensors. Refer to FOR ENGINE CJRA - CRANKSHAFT, CYLINDER BLOCK , FOR ENGINE CGVA - CRANKSHAFT, CYLINDER BLOCK or FOR ENGINE CGUA - CRANKSHAFT, CYLINDER BLOCK .
- Perform the PCM Verification Test. Refer to PCM VERIFICATION TEST .
A battery disconnect must be performed to clear the cam crank synchronization events.
No
- Repair the ground circuits as necessary.
- Perform the PCM Verification Test. Refer to PCM VERIFICATION TEST .
A battery disconnect must be performed to clear the cam crank synchronization events.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.