Instrument Cluster ECU-To-Gauge Circuits
Remove instrument cluster circuit plate. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Using DVOM, measure resistance between specified circuit plate terminals at connectors "O", "P", "Q" and "R". See Figure. Ensure resistance is as specified. See GAUGE CIRCUIT RESISTANCE TEST table. If circuit plate resistance is not as specified, replace instrument cluster circuit plate. If circuit plate resistance is as specified, measure resistance of appropriate gauge. Repair as necessary.
GAUGE CIRCUIT RESISTANCE TEST
| Terminals | Component | Ohms (Approximate) |
|---|---|---|
| O1-O3 | Engine Coolant Temperature Gauge | 164.2 |
| O2-O4 | Engine Coolant Temperature Gauge | 151.8 |
| P1-P4 | Tachometer | 164.2 |
| P2-P3 | Tachometer | 151.8 |
| Q1-Q4 | Speedometer | 164.2 |
| Q2-Q3 | Speedometer | 151.8 |
| R1-R4 | Fuel Gauge | 164.2 |
| R2-R3 | Fuel Gauge | 151.8 |