Pass Key Decoder Module Test 1
NOTE:
The following table is used to verify voltage at the Pass Key Decoder Module connector with the connector disconnected and the ignition switch in the "RUN" position.
PASS KEY DECODER MODULE TEST (TABLE 1A)
| Measure Between | Correct Voltage | For Diagnosis |
|---|---|---|
| A1 (PNK/BLK) & GROUND | BATTERY | See 1 |
| B8 (ORN) & GROUND | BATTERY | See 2 |
| A1 (PNK/BLK) & B1 (BLK/WHT) | BATTERY | See 3 |
| A2 (DK BLU) & B1 (BLK/WHT) | 5 Volts | See 4 |
NOTE:
The following table continues to verify voltage at the Pass Key Decoder Module connector with the connector disconnected and the ignition switch in the "START" position.
PASS KEY DECODER MODULE TEST (TABLE 1B)
| Measure Between | Correct Voltage | For Diagnosis |
|---|---|---|
| A3 (DK GRN) & GROUND | BATTERY | See Step 5). |
| * If voltages are correct, go to PASS KEY DECODER MODULE TEST 2 . | ||
- Check the PNK/BLK (439) wire and ENG CNL Fuse for an open.
- Check the ORN (440) wire and VATS Fuse for an open.
- Check the BLK/WHT (450) wire for an open.
- Check the DK BLU (229) wire for an open. If wire is good, replace ECM.
- Check DK GRN (965) wire for an open. If wire is good, do PASS KEY DECODER MODULE TEST .