Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the A Diagnostic System Check - Defogger? | -- | Go to Step 2 | |
2 |
Did the test light illuminate? | -- | Go to Step 3 | Go to Step 14 |
3 | Connect a test light between the connector terminal D3 and ground. Did the test light illuminate? | -- | Go to Step 4 | Go to Step 15 |
4 | Connect a test lamp between connector relay terminal D3 and terminal C1. Did the test light illuminate? | -- | Go to Step 7 | Go to Step 5 |
5 |
Did the test light illuminate? | -- | Go to Step 6 | Go to Step 10 |
6 |
Did the test light illuminate? | -- | Go to Step 11 | Go to Step 13 |
7 |
Does the resistance measure within the specified range? | 0-5 ohms | Go to Step 12 | Go to Step 8 |
8 |
Did the test light illuminate? | -- | Go to Step 9 | Go to Step 16 |
9 |
Did the PZM command the defogger to turn on? | -- | Go to Diagnostic System Check in HVAC Systems - Automatic | Go to Step 18 |
10 |
Did you find and correct the condition? | -- | -- | |
11 |
Did you find and correct the condition? | -- | -- | |
12 | Inspect for poor connections/terminal tension at the relay harness connector. Refer to Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 17 | |
13 | Inspect for poor connection/terminal tension at terminal A of the negative and positive bus connectors of the rear defogger. Did you find and correct the condition? | -- | -- | |
14 | Test CKT 147 (LT GRN) for an open. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | -- | |
15 | Test CKT 1242 (RED) for an open. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | -- | |
16 | Test CKT 193 (WHT) for an open. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | -- | |
17 | Replace the defogger relay. Did you complete the repair? | -- | -- | |
18 | Replace the body control module (PZM). Refer to Body Control Module Replacement in Body Control Systems. Did you complete the repair? | -- | -- |
