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

1. Check CAN BUS resistance in Data Link Connector
(1) Ignition "OFF".
(2) Measure the resistance between terminals 3 and 11 of data link connector (Test 1)
(3) Disconnect PCM connector.
(4) Measure the resistance between terminals 3 and 11 of data link connector (Test 2)

Specification :
** PCM and ABS (or ESP) module connected : 60 ± 3 Ohms (Test 1)
** PCM and ABS (or ESP) module disconnected : 120 ± 3 Ohms (Test 2)





(5) Is CAN BUS resistance within the specification ?





2. Check short to ground in CAN BUS
(1) Ignition "OFF"
(2) Disconnect PCM and ABS (or ESP) module connector.
(3) Check continuity between DLC terminal 3 and chassis ground. (CAN HIGH line)
(4) Check continuity between DLC terminal 11 and chassis ground. (CAN LOW line)

Specification : Discontinuity (Infinite Ohms)





(5) Is measured resistance within the specification ?





3. Check short to battery in CAN BUS
(1) Ignition "OFF"
(2) Disconnect PCM and ABS (or ESP) connector.
(3) Ignition "ON"
(4) Measure the voltage of DLC terminal 3. (CAN HIGH line)
(5) Measure the voltage of DLC terminal 11. (CAN LOW line)

Specification : 0.0V ~ 0.1V





(6) Is the measured voltage within the specification ?





4. Check CAN BUS continuity
(1) Ignition "OFF".
(2) Disconnect PCM and ABS (or ESP) module connector.
(3) Check continuity in CAN HIGH line. (CAN HIGH : PCM connector terminal 41, ABS connector terminal 26, ESP connector terminal 35, Data link connector (DLC) terminal 3)
(4) Check continuity in CAN LOW line. (CAN LOW : PCM connector terminal 42, ABS connector terminal 15, ESP connector terminal 14, Data link connector (DLC) terminal 11)

Specification : Continuity (below 1.0 Ohms)





(5) Is the measured resistance within the specification ?