Test D: Engine Oil Pressure Gauge Inaccurate/Inoperative
CAUTION:
Ensure engine oil level is correct and engine has sufficient oil pressure before performing test.
- If instrument panel cluster diagnostic system check has been performed, go to next step. If instrument panel cluster diagnostic system check has not been performed, go to INSTRUMENT PANEL CLUSTER DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM.
- Start engine. Observe engine oil pressure gauge. Gauge should display 0-73 psi (0-500 kPa). If gauge does not display specified value, go to next step. If gauge displays specified value, concern maybe intermittent. See PROBLEM DIAGNOSIS under INTERMITTENTS.
- Turn ignition switch to OFF position. Disconnect in-line Brown 6-pin harness connector C102. In-line harness connector C102 is located at left front of engine compartment, behind battery. Connect Signal Generator and Instrument Panel Tester (J 33431-C) between ground and male terminal side of in-line harness connector C102 terminal No. 2 (Blue/Green wire). See Fig 1
. Turn ignition switch to RUN position. Dial signal generator to specified value, and compare engine oil pressure gauge display to specified value. See ENGINE OIL PRESSURE GAUGE SPECIFICATIONS
table. If engine oil pressure gauge display matches specified value, go to next step. If engine oil pressure gauge display does not match specified value, go to step 5
.ENGINE OIL PRESSURE GAUGE SPECIFICATIONS
Gauge Specification (psi) Signal Generator Setting (Ohms) 80 200 140 40 1.2 0 - Check for open, high resistance, short to ground, or short to voltage in Blue/Yellow wire between in-line harness connector C102 terminal No. 14 and engine oil pressure sensor terminal. See WIRING DIAGRAMS . If problem is found, repair as necessary and go to step 10 . If no problem is found, go to step 8 .
- Check for open, a high resistance, a short to ground, or a short to voltage in Blue/Yellow wire between in-line harness connector C102 terminal No. 14 and cluster harness connector C2 terminal No. 26. See Fig 1 and Fig 2 . If problem is found, repair as necessary and go to step 10 . If no problem is found, go to step 7 .
- Check for poor, loose or corroded terminals in engine oil pressure sensor harness connector. Check case ground of engine oil pressure sensor for poor connection. If problem is found, repair as necessary and go to step 10 . If no problem is found, go to step 8 .
- Check for poor, loose or corroded terminals in IPC harness connectors. If problem is found, repair as necessary and go to step 10 . If no problem is found, go to step 9 .
- Replace engine oil pressure sensor. After repairs are made, go to step 10 .
- Replace gauge cluster. See GAUGE CLUSTER under REMOVAL & INSTALLATION. Go to step 8 .
- Operate system to verify repair. If system operates normally, testing is complete. If system does not operate normally, go to step 2 .