Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform A Diagnostic System Check- Defogger? | -- | Go to Step 2 | |
2 |
Does the scan tool indicate that the parameter switched? | -- | Go to Step 3 | Go to Step 12 |
3 | With a scan tool, command the rear defogger relay ON and OFF. Does the rear defogger relay click ON and OFF with each command? | -- | Go to Step 9 | Go to Step 4 |
4 |
Does the test lamp illuminate? | -- | Go to Step 5 | Go to Step 15 |
5 |
Does the test lamp turn ON and OFF with each command? | -- | Go to Step 13 | Go to Step 6 |
6 | Does the test lamp remain illuminated with each command? | -- | Go to Step 8 | Go to Step 7 |
7 | Test the control circuit of the rear defogger relay for a short to voltage or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 15 | Go to Step 14 |
8 | Test the control circuit of the rear defogger relay for a short to ground. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 22 | Go to Step 14 |
9 | Test the rear defogger fuse. Is the fuse open? | -- | Go to Step 16 | Go to Step 10 |
10 |
Does the test lamp illuminate with each command? | -- | Go to Step 11 | Go to Step 19 |
11 |
Is the resistance within the specified value? | 1-3 ohms | Go to Step 17 | Go to Step 18 |
12 | Inspect for poor connections at the heater and A/C control. 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 22 | Go to Step 20 |
13 | Inspect for poor connections at the rear defogger 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 22 | Go to Step 19 |
14 | Inspect for poor connections at the harness connector of the RIM. 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 22 | Go to Step 21 |
15 | Repair the coil side feed circuit of the rear defogger relay. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 22 | -- |
16 | Repair the rear defogger grid input circuit and replace the fuse. Did you find and correct the condition? | -- | Go to Step 22 | -- |
17 | Repair open rear defogger grid. Did you find and correct the condition? | -- | Go to Step 22 | -- |
18 | Repair open rear defogger element ground circuit. Did you find and correct the condition? | -- | Go to Step 22 | -- |
19 | Replace the rear defogger relay. Did you complete the replacement? | -- | Go to Step 22 | -- |
20 | Replace the heater and A/C control. Refer to Control Assembly Replacement in HVAC. Did you complete the replacement? | -- | Go to Step 22 | -- |
21 | Replace the RIM. Refer to Rear Integration Body Control Module Replacement in Body Control Systems. Did you complete the replacement? | -- | Go to Step 22 | -- |
22 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
