Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FUSE (ECU-B, GAUGE1, IG2)
1. Check the continuity in ECU-B fuse.
2. Check the continuity in GAUGE1 fuse.
3. Check the continuity in IG2 fuse.
NG: REPLACE FUSE

OK: Go to next step.
CHECK COMBINATION METER ASSY (POWER SOURCE CIRCUIT)
1. Check voltage
  1. Remove the combination meter assy with connectors still connected.
  2. Measure voltage between terminal C7-20 of combination meter assy connector and body ground.
    Voltage: 10-14V
  3. Turn the ignition switch to ON.
  4. Measure voltage between terminal C7-39 of combination meter assy connector and body ground.
    Voltage: 10-14V
  5. Turn the ignition switch to ON.
  6. Measure voltage between terminal C7-40 of combination meter assy connector and body ground.
    Voltage: 10-14V
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step.
CHECK COMBINATION METER ASSY (GROUND CIRCUIT)
1. Check continuity.
  1. Disconnect the "C7" connector from combination meter assy.
  2. Check continuity between terminal C7-1 of combination meter assy connector and body ground.
    OK: Continuity exists
  3. Check continuity between terminal C7-21 of combination meter assy connector and body ground.
    OK: Continuity exists
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: CHECK AND REPLACE COMBINATION METER ASSY