W/Harness Inspection

Active Air Flap

U0298 Lost Communication with DC to DC Converter Control Module - Inspection/Repair:_:W/Harness Inspection

W/Harness 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?






CAN communication line inspection

CAN communication circuit inspection (LDC <->A.A.F)
1. Ignition "OFF"
2. Disconnect A.A.F connector and LDC connector.
3. Measure the resistance between CAN-HIGH terminal of A.A.F harness connector and CAN-HIGH terminal of LDC harness connector.
4. Measure the resistance between CAN-LOW terminal of A.A.F harness connector and CAN-LOW terminal of LDC harness connector.

Specification : below 1 Ohms








5. Is the measured resistance within specification?





Check short to ground in CAN communication line
1. IG KEY OFF.
2. Measure resistance between CAN high terminal (# 3) of diagnostic connector and chassis ground.
3. Measure resistance between CAN low terminal (# 11) of diagnostic connector and chassis ground.

Specification : Infinity Ohms








4. Is the measured value within specification?