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 OR 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