| 1. | Turn the ignition switch ON (II). |
| 2. | Do the gauge self-diagnostic function. Does the MIL indicator flash? YES - Go to 3. NO - Substitute a known-good gauge control module (tach), and recheck. If the MIL circuit is OK, replace the original gauge control module (tach).n |
| 3. | Connect the HDS to the DLC. |
| 4. | Check the SCS in the DATA LIST with the HDS. Is a short indicated? YES - Go to 5. NO - Update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM.n |
| 5. | Turn the ignition switch OFF, and wait 1 minute. |
| 6. | Disconnect the HDS from the DLC. |
| 7. | Check for continuity between ECM connector No. 2 terminal No. 20 and body ground.
Is there continuity? YES - Repair short in the wire between the SRS unit, the DLC and ECM connector No. 2 terminal No. 20.n NO - Update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM.n |