Inspection Procedure

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.
1. NG: REPLACE FUSE
2. 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 - 14 V
  3. Turn the ignition switch to ON.
  4. Measure voltage between terminal C7-39 of combination meter assy connector and body ground.
    
    Fig 1: Identifying Combination Meter Assy Connector Terminal C7-20, C7-39 And C7-40
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Voltage: 10 - 14 V
  5. Turn the ignition switch to ON.
  6. Measure voltage between terminal C7-40 of combination meter assy connector and body ground.
    Voltage: 10 - 14 V
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. 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
1. NG: REPAIR REPLACE HARNESS OR CONNECTOR
  
  Fig 2: Identifying Combination Meter Assy Connector Terminal C7-1 And C7-21
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. OK: CHECK AND REPLACE COMBINATION METER ASSY