Diagnostic Fault Information
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. See Diagnostic System Check - Vehicle in Vehicle DTC Information
Diagnostic Fault Information
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance | |
| Rear Defogger Switch Signal | 1 | 1 | 1 | -- | |
| HVAC Control Module Ground | -- | 1, 2 | 1, 2 | -- | |
| Rear Defogger Relay Control | B0285 | B0286 | 2, 3 | -- | |
| Defog Indicator Supply Voltage | B0285 | B0286 | 2, 3 | -- | |
| Switch Side Supply Voltage REAR DEFOG Relay | 3 | 3 | -- | -- | |
| Coil Side Ground REAR DEFOG Relay | 3 | 3 | -- | -- | |
| 1. HVAC Control Module malfunction 2. HVAC Defogger Indicator 3. Rear defogger malfunction |
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