| DTC 86-31: | F-CAN Communication with Gauge Control Module Malfunction |
| 1. | Turn the ignition switch ON (II). |
| 2. | Clear the DTC with the HDS. |
| 3. | Turn the ignition switch OFF, then turn it ON (II) again. |
| 4. | Check for DTCs with the HDS. Is 86-31 DTC indicated? YES - Go to 5. NO - Intermittent failure, the system is OK at this time. Check for loose terminals between the ECM/PCM connector A (44P), the gauge control module (tach) connector (36P) and the ABS modulator-control unit 25P connector. Refer to intermittent failures troubleshooting.n |
| 5. | Turn the ignition switch ON (II). Do the gauge indicators come on? YES - Go to 6. NO - Do the gauge control module troubleshooting.n |
| 6. | Turn the ignition switch OFF. |
| 7. | Disconnect the gauge control module (tach) connector (36P). |
| 8. | Disconnect the ABS modulator-control unit 25P connector. |
| 9. | Check for continuity between ABS modulator-control unit 25P connector terminal and gauge control module (tach) connector (36P) terminal (see table).
Is there continuity? YES - Check for loose terminals in the gauge control module (tach) connector (36P). If necessary, substitute a known-good gauge control module (tach), then go to 1 and recheck. If no DTCs are indicated, replace the original gauge control module (tach). If DTC 86-31 resets, replace the ABS modulator-control unit: Except K20Z2 engine model, K20Z2 engine model.n NO - Repair open in the wire between the gauge control module (tach) and the ABS modulator-control unit.n | |||||||||||