Instrument Cluster Test 3D - Temperature Gauge Not Operating Properly
NOTE:
Perform INSTUMENT CLUSTER TEST 1A
before proceeding with this test. For connector terminal identification, see CONNECTOR IDENTIFICATION
For wiring diagrams, refer to WIRING DIAGRAMS
. Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE
.
CAUTION:
Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
- Using scan tool, read engine trouble codes. If codes related to engine coolant temperature are displayed, see TESTS W/CODES article in the ENGINE PERFORMANCE Section. If no codes are displayed, go to next step.
- Using scan tool, actuate instrument cluster gauges. Temperature gauge should move to HOT mark, then in steps should move to 1/2, COLD marks. If temperature gauge functions as described, replace BCM. If temperature gauge does not function correctly, go to next step.
- Remove instrument cluster and access back of gauges. Using external ohmmeter, measure resistance across temperature gauge terminals at 12 and 6 o'clock (vertical), and 3 and 9 o'clock (horizontal). If resistance is 200-220 ohms, replace instrument cluster circuit board. If resistance is not 200-220 ohms, replace temperature gauge pack.