3838549

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 " Power Circuit Inspection " procedure.

1.

Check voltage

(1)

IG "OFF".

(2)

Disconnect A/C relay.

(3)

IG "ON" and ENG "OFF"

(4)

Measure the voltage between terminal 86 of A/C relay harness connector and chassis ground.

(5)

Measure the voltage between terminal 30 of A/C relay harness connector and chassis ground.

a.

Specification : B+

(6)

Is the measured voltage normal?

YES

▶ Go to "Control circuit inspection" procedure.

NO

▶ Check the fuse between Battery and A/C relay.

▶ Check Chassis ground for looseness.

▶ Repair open or short to ground in power harness and go to "Verification of Vehicle Repair" procedure.

1.

Check short in harness

(1)

IG "OFF".

(2)

Disconnect A/C relay and PCM connector.

(3)

Measure the resistance between terminal 85 of A/C relay harness connector and chassis ground.

a.

Specification : Infinite

(4)

Is the measured resistance within specification ?

YES

▶ Go to "Check open in harness" as follows.

NO

▶ Repair Short in Coil control harness and go to "Verification of Vehicle Repair" procedure.

2.

Check open in harness

(1)

IG "OFF".

(2)

Disconnect A/C relay and PCM connector.

(3)

Measure the resistance between terminal 85 of A/C relay harness connector and terminal 64 of PCM harness connector.

a.

Specification : Approx. below 1Ω

(4)

Is the measured resistance within specification ?

YES

▶ Go to "Component inspection" procedure.

NO

▶ Repair Open in Coil control harness and go to "Verification of Vehicle Repair" procedure.