W/Harness Inspection

Engine Control
U1112 LIN Communication Error - Inspection/Repair:_:W/Harness Inspection

Terminal and Connector inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminals. 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?






Signal Circuit Inspection

Check open in harness
1. IG "OFF" and disconnect battery sensor and PCM connector.
2. Check resistance between LIN terminal of battery sensor harness Connector and PCM harness connector.

Specification :Below 1.0Ohms




3. Is the measured resistance within specification?





Check short to battery in harness
1. IG "OFF" and disconnect battery sensor and PCM connector.
2. IG "ON".
3. Measure the voltage between LIN terminal of battery sensor harness connector and chassis ground.

Specification :Approx. 0V




4. Is the measured voltage within specification?





Check short to ground in harness
1. IG "OFF" and disconnect battery sensor and PCM connector.
2. Check resistance between LIN terminal of battery sensor harness Connector and chassis ground.

Specification :Infinity




3. Is the measured resistance within specification?