Inspection Procedure

1. Check if the CAN communication system DTC is output (See DIAGNOSTIC TROUBLE CODE CHART ).

   Result 

   RESULT REFERENCE
   
   

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

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

OK: Go to next step 

1. Check the battery voltage.

   Standard voltage: 

   11 to 14 V 

NG: RECHARGE OR REPLACE BATTERY  (See REPAIR INSTRUCTION )

OK: Go to next step 

1. Disconnect the A19 and A21 ECU connectors
2. Turn the power switch ON (IG).
3. Measure the voltage according to the value(s) in the table below

   Standard voltage 

   VOLTAGE SPECIFICATION
   
   

   Tester Connection	Switch Condition	Specified Condition
   A19-46 (IG1) - A19-1 (GND)	Power switch ON (IG)	11 to 14 V
   A21-46 (IG2) - A21-1 (GND4)	Power switch ON (IG)	11 to 14 V

Fig 1: Identifying A19 And A21 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   A19-1 (GND) - Body ground	Always	Below 1 Ω
   A21-1 (GND4) - Body ground	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Perform the meter and gauge system active test (see DATA LIST / ACTIVE TEST ).

   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 NO. 1 METER ECU  (See DISASSEMBLY )

OK: REPLACE SKID CONTROL ECU  (See REMOVAL  )