W/Harness Inspection

Tire Pressure Monitoring
C1346 Rear Low Frequency Initiator Channel Failure - W/Harness Inspection

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminal condition. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?






Power Circuit Inspection

Check power in harness
1. IG OFF.
2. Disconnect Rear Initiator connector and TPMS ECU connector.
3. Measure voltage between power terminal of Rear Initiator harness connector and chassis ground.

Specification : approx. B+.




4. Is the measured value within specifications?






Signal Circuit Inspection

Check short to battery in harness
1. IG OFF.
2. Disconnect Rear Initiator connector and TPMS ECU connector.
3. IG OFF.
4. Measure voltage between signal terminal of Rear Initiator harness connector and chassis ground.

Specification : approx. 0 V




5. Is the measured value within specifications?





Check short to ground in harness
1. IG OFF.
2. Disconnect Rear Initiator connector and TPMS ECU connector.
3. Measure resistance between signal terminal of Rear Initiator harness connector and chassis ground.

Specification :Infinity.




4. Is the measured value within specification?





Check for open in harness
1. IG OFF.
2. Disconnect Rear Initiator connector and TPMS ECU connector.
3. Measure resistance between signal terminal of Rear Initiator harness connector and signal terminal of TPMS ECU harness connector.

Specification :Below approx. 1 Ohms




4. Is the measured value within specification?






Ground Circuit Inspection

Check for open in harness
1. IG "OFF".
2. Disconnect Rear Initiator connector and TPMS ECU connector.
3. Measure resistance between ground terminal of Rear Initiator harness connector and ground terminal of TPMS ECU harness connector.

Specification : Below approx. 1 Ohms




4. Is the measured value within specifications?