DaimlerChrysler Jeep Grand Cherokee 2002 Service Manual page 222

DRIVEABILITY - DIESEL
*A/C INOPERATIVE —
TEST
9 If there are no possible causes remaining, view repair.
Repair
10 Turn the ignition off.
Disconnect the AZC Module C2 harness connector or the A/C - Heater Control C1
harness connector.
Turn the ignition on.
Measure the voltage of the A/C Switch Signal circuit.
Is the voltage greater than 11.0 volts?
Yes → Go To 11
→ Go To 12
No
11 Turn the ignition off.
Disconnect the AZC Module C2 harness connector or the A/C - Heater Control C1
harness connector.
Turn the ignition on.
With the DRBIII in BCM, select Inputs/Outputs.
Monitor the A/C Select Switch state while connecting a jumper wire between ground
and the A/C Switch Signal circuit in the AZC Module C2 harness connector or the A/C
- Heater Control C1 harness connector.
Does the A/C Select Switch state change from Off to On when the jumper wire is
connected?
Yes → Replace the AZC Module or the A/C - Heater Control Module in
→ Replace and program the Body Control Module in accordance
No
12 Turn the ignition off.
Disconnect the BCM C1 harness connector.
Disconnect the AZC Module C2 harness connector or the A/C - Heater Control C1
harness connector.
Measure the resistance of the A/C Switch Signal circuit between the AZC Module C2
harness connector or the A/C - Heater Control C1 harness connector and the BCM C1
harness connector.
Is the resistance below 5.0 ohms?
Yes → Replace and program the Body Control Module in accordance
→ Repair the A/C Switch Signal circuit for an open.
No
Continued
ACTION
Replace the A/C Clutch in accordance with the Service Informa-
tion.
Perform ROAD TEST VERIFICATION - VER-2.
accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
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APPLICABILITY
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