Inspection Procedure

1. Check DTC on PRE-CHECK .

1. YES: REPAIR CIRCUIT INDICATED BY OUTPUT CODE 
2. NO: Go to next step 

1. NO: CONNECT CONNECTOR TO ECU 
2. YES: Go to next step 

IN CASE OF USING LEXUS HAND-HELD TESTER: 

1. Check the voltage condition output from the ECU displayed on the LEXUS hand held tester.

   OK: 

   "Normal" is displayed. 

IN CASE OF NOT USING LEXUS HAND-HELD TESTER: 

1. Remove the skid control ECU with connectors still connected.
2. Turn the ignition switch ON.
3. Measure voltage between terminals IG1 (S7 - 6) and GND (S5 - 16, 22, S8 - 6, 31) of skid control ECU.

   OK: 

   Voltage: 10 - 14 V 

   Fig 1: Measuring Voltage Between Skid Control ECU Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. OK: CHECK AND REPLACE SKID CONTROL ECU ASSY 
2. NG: Go to next step 

OK: 

Voltage: 10 - 14 V 

1. NG: CHECK AND REPLACE CHARGING SYSTEM 
2. OK: Go to next step 

1. Check for short circuit in harness and connector between terminal Tc of DLC3 and skid control ECU.

1. NG: REPAIR OR REPLACE HARNESS OFF CONNECTOR 
2. OK: Go to next step 

1. See combination meter troubleshooting PROBLEM SYMPTOMS TABLE .

1. NG: REPAIR OR REPLACE COMBINATION METER ASSEMBLY 
2. OK Go to next step 

1. Check for open and short circuit in multiplex communication system between skid control ECU and combination meter (See HOW TO PROCEED WITH TROUBLESHOOTING ).

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
2. OK: CHECK AND REPLACE SKID CONTROL ECU ASSY