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?

YES

Repair as necessary and go to "Verification of Vehicle Repair" procedure.

NO

Go to "Signal Circuit Inspection" procedure.

Signal Circuit Inspection
1.

Check for open in harness

(1)

Ignition "OFF" & Engine "OFF".

(2)

Disconnect ECM & TCM connector.

(3)

Measure resistance between terminal 4 of TCM harness connector and terminal 9 of ECM harness connector.

(4)

Measure resistance between terminal 3 of TCM harness connector and terminal 10 of ECM harness connector.

Specification : Approx. below 1Ω

(5)

Is the measured resistance within specifications ?

YES

▶ Go to "Check for short to ground in harness" as below.

NO

▶ Check for open in the signal harness.

Repair as necessary and go to "Verification of Vehicle Repair" procedure.

2.

Check for short to ground in harness.

(1)

Ignition "OFF" & Engine "OFF".

(2)

Disconnect TCM,ECM, TCCU and HCU connector.

(3)

Measure resistance between terminal 4 of TCM harness connector and chassis ground.

(4)

Measure resistance between terminal 3 of TCM harness connector and chassis ground.

Specification : Infinite

(5)

Is the measured resistance within specificaitons ?

YES

▶ Go to "Component Inspection" procedure.

NO

▶ Check for short to ground in signal harness.

Repair as necessary and go to "Verification of Vehicle Repair" procedure.

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