Inspection Procedure

1. Check voltage.
   1. Remove the combination meter assy with connector still connected.
   2. Turn the ignition switch to ON.
   3. Measure voltage between terminal C8-18 of combination meter assy connector and body ground.
   Fig 1: Checking Combination Meter Assy Voltage
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard voltage: 

Fig 2: Combination Meter Assy Voltage Reference Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: CHECK AND REPLACE COMBINATION METER ASSY 

NG: Go to next step. 

1. Remove the steering pad switch.
2. Check resistance between terminals +DP and -DP of steering pad switch connector.
Fig 3: Inspecting Steering Pad Switch Resistance
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Resistance: 

Fig 4: Steering Pad Switch Resistance Reference Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE STEERING PAD SWITCH 

OK: Go to next step. 

REPAIR OR REPLACE HARNESS OR CONNECTOR