Inspection Procedure

1. Check the center differential lock switch (see CENTER DIFFERENTIAL LOCK SWITCH ).

NG: REPAIR CENTER DIFFERENTIAL LOCK SWITCH 

OK: Go to Next step 

1. Turn the ignition switch ON.
2. Check that the VSC TRAC warning light turns on.
3. Check for DTCs.

   Result: 

   RESULT
   
   

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

B: END 

A: Go to Next step 

1. Check the center differential lock indicator light (see COMBINATION METER ).

NG: REPLACE COMBINATION METER 

OK: Go to Next step 

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to Next step 

1. Remove the skid control ECU with the connectors still connected.
2. Turn the ignition switch ON.
3. Measure the voltage between terminal EXI of the skid control ECU and body ground when the transfer is in the L4 position.

   OK: 

   Standard voltage: 

   10 to 14 V 

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

Fig 1: Identifying A41 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next step 

1. Check the transfer indicator switch (see INSPECTION ).

NG: REPLACE TRANSFER INDICATOR SWITCH 

OK: REPLACE SKID CONTROL ECU ASSEMBLY