Inspection Procedure

1. Check if the CAN communication system DTC is output (see DIAGNOSIS SYSTEM ).

   Result 

   RESULT REFERENCE
   
   

   Condition	Proceed to
   DTC is not output	A
   DTC is output	B

B: REPAIR CAN COMMUNICATION SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

A: Go to next step 

1. Check if the multiplex communication system DTC is output (see DTC CHECK / CLEAR ).

   Result 

   RESULT REFERENCE
   
   

   Condition	Proceed to
   DTC is not output	A
   DTC is output	B

B: REPAIR MULTIPLEX COMMUNICATION SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

A: Go to next step 

1. Check the skid control ECU connector's connecting condition.

   OK: 

   The connector is securely connected. 

NG: CONNECT CONNECTOR TO ECU CORRECTLY  (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE )

OK: Go to next step 

1. Check the battery voltage.

   Standard voltage: 

   10 to 14 V 

NG: INSPECT CHARGING SYSTEM  (See ON-VEHICLE INSPECTION )

OK: Go to next step 

1. Disconnect the A13 and A15 ECU connectors.
2. Turn the power switch ON (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   STANDARD VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   A13-16 (IG1) - Body ground	Power switch ON (IG)	10 to 14 V

4. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   A13-1 (GND) - Body ground	Below 1 Ω
   A15-1 (GND4) - Body ground	Below 1 Ω

Fig 1: Identifying A13 And A15 ECU Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Check the combination meter (see ON-VEHICLE INSPECTION ).

   HINT:

   If troubleshooting has been carried out according to the "PROBLEM SYMPTOMS TABLE", refer back to the table and proceed to the next step before replacing the part (see PROBLEM SYMPTOMS TABLE  ).

NG: REPLACE COMBINATION METER ASSEMBLY  (See REMOVAL )

OK: REPLACE SKID CONTROL ECU  (See REMOVAL  )