Intermittent failure, the system is OK at this time. Check for loose or poor connection at the gauge control module (tach) 36P connector, and at the under-dash fuse/relay box connector Q (16P). If the connections are good,
check the battery condition
and the charging system.■
Measure voltage between the gauge control module (tach) 36P connector No. 17 terminal and body ground.
Is there battery voltage?
YES
-
Faulty MICU or an open in the under-dash fuse/relay box internal circuit. Substitute a known-good under-dash fuse/relay box and recheck.■
NO
-
Check No. 10 (7.5 A) fuse in the under-dash fuse/relay box. If the fuse is OK, check for an open in the wire between the under-dash fuse/relay box and the gauge control module (tach), or repair a short in the wire between the under-dash fuse/relay box and the gauge control module (tach).■