Rear Window Defogger Inoperative w/CJ2
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Defogger Schematics Connector End View Reference: Stationary Windows Connector End Views | |||
1 | Did you perform the Defogger Diagnostic System Check? | Go to Step 2 | |
2 |
Does the rear window defogger indicator illuminate? | Go to Step 3 | Go to Step 8 |
3 | Connect a test lamp between the rear window defogger grid and a good ground. Does the test lamp illuminate? | Go to Step 4 | Go to Step 5 |
4 | Connect a test lamp between the left side of the rear window defogger grid and the right side of the rear window defogger grid. Does the test lamp illuminate? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 10 |
5 |
Does the test lamp illuminate? | Go to Step 6 | Go to Step 7 |
6 |
Does the test lamp illuminate? | Go to Step 9 | Go to Step 12 |
7 | Test the battery positive voltage circuit of the RR DEFOG relay switched input for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 11 |
8 | Inspect for poor connection at the harness connector of the HVAC Control Module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 13 |
9 | Inspect for poor connection at the RR DEFOG relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 14 |
10 | Repair an open or high resistance in the ground circuit of the rear window defogger. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 15 | -- |
11 | Repair a short to ground in the supply voltage circuit of the rear window defogger. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 15 | -- |
12 | Repair an open or high resistance in the supply circuit of the rear window defogger. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 15 | -- |
13 | Replace the HVAC Control Module. Refer to HVAC Control Module Replacement in HVAC Systems - Automatic. Did you complete the replacement? | Go to Step 15 | -- |
14 | Replace the RR DEFOG relay. Did you complete the replacement? | Go to Step 15 | -- |
15 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Rear Window Defogger Inoperative w/oCJ2
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Defogger Schematics Connector End View Reference: Stationary Windows Connector End Views | |||
1 | Did you perform the Defogger Diagnostic System Check? | Go to Step 2 | |
2 |
Does the rear window defogger indicator illuminate? | Go to Step 3 | Go to Step 10 |
3 | Connect a test lamp between the rear window defogger grid and a good ground. Does the test lamp illuminate? | Go to Step 4 | Go to Step 5 |
4 | Connect a test lamp between the left side of the rear window defogger grid and the right side of the rear window defogger grid. Does the test lamp illuminate? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 14 |
5 | With a scan tool, observe the HVAC Rear Defogger Switch parameter in the Body Control Module (BCM) data list. Does the scan tool display Active? | Go to Step 7 | Go to Step 6 |
6 |
Does the test lamp illuminate? | Go to Step 13 | Go to Step 10 |
7 |
Does the test lamp illuminate? | Go to Step 8 | Go to Step 9 |
8 |
Does the test lamp illuminate? | Go to Step 12 | Go to Step 16 |
9 | Test the battery positive voltage circuit of the RR DEFOG relay switched input for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 15 |
10 | Test the secondary rear defogger switch signal circuit of the HVAC Control Module for an open or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 11 |
11 | Inspect for poor connections at the harness connector of the HVAC Control Module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 17 |
12 | Inspect for poor connections at the RR DEFOG relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 18 |
13 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 19 |
14 | Repair an open or high resistance in the ground circuit of the rear window defogger. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- |
15 | Repair a short to ground in the supply voltage circuit of the rear window defogger. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- |
16 | Repair an open or high resistance in the supply circuit of the rear window defogger. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- |
17 | Replace the HVAC Control Module. Refer to HVAC Control Module Replacement in HVAC Systems - Manual. Did you complete the replacement? | Go to Step 20 | -- |
18 | Replace the RR DEFOG relay. Did you complete the replacement? | Go to Step 20 | -- |
19 |
Important:: Perform the set up procedure for the BCM. Replace the BCM. Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | Go to Step 20 | -- |
20 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
