Oil Pressure Sensor/Switch Test
- Turn ignition on. Use Tech 1 IPC function and read DTC's. If Tech 1 displays oil pressure sensor circuit (DTC 91), go to next step. If Tech 1 does not display oil pressure sensor circuit, got to step 4).
- Turn ignition off. Disconnect oil pressure sensor/switch connector. Connect jumper wire between harness connector terminal "A" (Tan wire) and ground. Turn ignition on. If LOW OIL PRESSURE indicator lights, check Black and Black/White wire for an open circuit or high resistance. Also check in-line connector for good terminal contact. Check oil pressure sensor/switch connector for good terminal contact at terminals "A" and "B". If all circuits are okay, replace oil pressure sensor/switch.
- If LOW OIL PRESSURE indicator does not light, check Tan/White wire for an open circuit or high resistance. Also check in-line connector for good contact at terminal F2. Also check instrument cluster connector C2 for good contact at terminal C3. If all circuits are okay, replace instrument cluster.
- Turn ignition off. Disconnect oil pressure sensor connector. Connect 2 Red leads from Gauge Tester (J-33431) to terminals "A" (Tan/White wire) and "B" (Black wire). Turn ignition on. Using Tech 1 IPC data list select OIL PRESSURE. Set tester resistance dials to zero ohms (zero psi), then to 85 ohms (120 psi).
- If Tech 1 displays zero psi at zero ohms and 120 psi at 85 ohms, check oil pressure sensor/switch for good contact at terminals "A" and "B". If terminal contact is okay, replace oil pressure sensor/switch.
- If Tech 1 does not display zero psi at zero ohms and 120 psi at 85 ohms, check Tan/White wire for a short to ground, open circuit, or high resistance. Also check Black/White wiring for an open circuit or high resistance. Check all connectors for good terminal contact. If all wiring and circuits are okay, replace instrument cluster.