COOLANT TEMPERATURE INACCURATE
Using a voltmeter, verify battery voltage at load side of fuse No. 11. See Fig. 5. If there is battery voltage at load side of fuse, go to step 3). If voltage is absent, go to next step.
Using voltmeter, verify voltage at feed side of fuse No. 11. If there is voltage present, replace fuse and retest system. If no voltage is present, repair wiring to fuse panel and retest system. See Fig. 5.
Partially remove cluster from instrument panel. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Using voltmeter, verify battery voltage at cluster connector C1, pin No. 13 (Red/Yellow wire) and temperature gauge terminal. See Fig. 1 -4. Inspect cluster for damage. If battery voltage is present, go to next step. If voltage is not present, repair circuit No. 640 (Red/Yellow wire) and retest system.
With ignition switch in OFF position, using ohmmeter, check continuity of cluster and gauge ground circuit at cluster connector C2, pin No. 2 (Black/White wire). See Fig. 1 -4. If resistance is less than one ohm, go to next step. If resistance is more than one ohm, repair circuit No. 570 (Black/White wire) and retest system.
Install Instrument Gauge System Tester (021-00055). Disconnect temperature sending unit at sender. Connect tester to cluster side of connector C2, pin No. 3 (Red/White wire). Set gauge tester to 74 ohms. If gauge reads "C", go to next step. If gauge does not read "C", go to step 7).
Set gauge tester to 9.7 ohms. If gauge reads "H", replace temperature sender. If gauge does not read "H", go to next step.
Using an ohmmeter, check sending unit circuit wiring and instrument cluster printed circuit for shorts or opens by physically flexing the wiring and observing continuity. Continuity reading should not fluctuate. If wiring and flex circuit are okay, replace gauge. See COOLANT TEMPERATURE/FUEL GAUGE under REMOVAL & INSTALLATION. If wiring and flex circuit are faulty, repair wiring or replace instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION.
OIL PRESSURE GAUGE INACCURATE
With a voltmeter, check for battery voltage at load side of fuse No. 11. See Fig. 5. If battery voltage is present, go to step 3). If voltage is not present, go to next step.
With a voltmeter, check for battery voltage at feed side of fuse No. 11. If battery voltage is present, replace fuse and retest circuit. If voltage is not present, repair wiring to fuse panel and retest.
Partially remove cluster from instrument panel. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Using voltmeter, verify battery voltage at cluster connector C2, pin No. 8 (Red/Yellow wire) and oil pressure gauge terminal. See Fig. 1 -4. Inspect cluster for damage. If battery voltage is present, go to next step. If voltage is not present, repair circuit No. 640 (Red/Yellow wire) and retest system.
With ignition switch in OFF position, check continuity of instrument cluster connector C2, pin No. 2 (Black/White wire) and gauge ground circuitry. If ground circuitry is okay, go to next step. If ground circuitry is faulty, repair wiring as necessary.
Turn ignition switch to ON position. If oil pressure gauge reads "L" or below, go to next step. If gauge reads higher than "L", go to step 7).
Disconnect oil pressure switch, and short lead to engine ground. If gauge indicates about mid-scale or slightly above, replace oil pressure switch. If gauge does not read in mid-scale, go to next step.
With ignition switch in OFF position, using an ohmmeter, check sending unit/switch wiring and instrument cluster printed circuit for shorts or opens by physically flexing wiring and observing continuity. Continuity reading should not fluctuate. If wiring and printed circuit test okay, replace oil pressure gauge. See OIL PRESSURE GAUGE/VOLTMETER under REMOVAL & INSTALLATION. If wiring or printed circuit does not test okay, repair wiring or replace instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION.
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Thursday, January 1st, 2009 AT 2:19 PM
