Inspection Procedure

1. Remove the combination meter assy.
2. Check voltage (TAUB signal).
   1. Turn the ignition switch to ON.
   2. Measure the voltage between terminal C11-2 of combination meter connector and body ground.

      Standard voltage: 10 - 14 V 

3. Check voltage (TAU signal).
   1. Turn the ignition switch to ON.
   2. Measure the voltage between terminal C11-3 of combination meter connector and body ground.

      Standard voltage: 10 - 14 V 

      Fig 1: Checking Combination Meter Assy (TAU, TAUB)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Check signal waveform (TAU signal).
   1. Connect the oscilloscope to the terminals C11-3 of combination meter connector and body ground.
   2. Start engine.
   3. Check the signal waveform.
      Fig 2: Item Contents Chart

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 3: Identifying Signal Waveform (TAU Signal)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Result: 

Fig 4: Result Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. B: GO TO ENGINE CONTROL SYSTEM (See  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
2. C: CHECK AND REPLACE COMBINATION METER ASSY 
3. A: GO TO NEXT STEP. 

1. Check the continuity in AM2 fuse.

1. NG: REPLACE FUSE 
2. OK: GO TO NEXT STEP. 

   REPAIR OR REPLACE HARNESS OR CONNECTOR