Inspection Procedure

1. Disconnect the skid control ECU connector.
2. Turn the ignition switch to the ON position.
3. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   S37-21 (EXI4) - Body ground	Transfer indicator switch ON (Shift L4 position)	Below 1.5 V
   S37-21 (EXI4) - Body ground	Transfer indicator switch OFF (Any shift position except L4)	8 to 14 V

NG: Go to step  4

Fig 1: Identifying S37 Skid Control ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step 

1. Reconnect the skid control ECU connector.
2. Check if the test mode (signal check) DTC is detected

   Result 

   RESULT CHART
   
   

   Condition	Proceed to
   Test mode (signal check) DTC is output	A
   Test mode (signal check) DTC is not output (When troubleshooting in accordance with the DTC CHART.)	B
   Test mode (signal check) DTC is not output (When troubleshooting in accordance with the PROBLEM SYMPTOMS TABLE.)	C

B: REPAIR OR REPLACE HARNESS OR CONNECTOR (L4 CIRCUIT) 

C: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

A: Go to next step 

1. Clear the DTC (See DTC CHECK/CLEAR  ).
2. Check if the same DTC is detected (See DTC CHECK/CLEAR  ).

   HINT:

   Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.

   Result 

   RESULT CHART
   
   

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

B: END 

A: REPLACE MASTER CYLINDER SOLENOID 

1. Disconnect the transfer indicator (L4) switch connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   D1-1 - D1-2	Switch pin pushed in	Below 1 Ω
   D1-1 - D1-2	Switch pin free	10 kΩ or higher

NG: REPLACE TRANSFER INDICATOR SWITCH 

Fig 2: Inspecting Transfer Indicator Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step 

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

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   S37-21 (EXI4) - D1-1	Below 1 Ω
   S37-21 (EXI4) - Body ground	10 kΩ or higher
   D1-2 - Body ground	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (EXI4 CIRCUIT) 

Fig 3: Checking Harness And Connector (Skid Control ECU - Transfer Indicator Switch)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step 

1. Disconnect the ECM connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   E7-13 (L4) - D1-1	Below 1 Ω
   E7-13 (L4) - Body ground	10 kΩ or higher

   Fig 4: Checking Harness And Connector (Transfer Indicator Switch - ECM)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Result 

   RESULT CHART
   
   

   Condition	Proceed to
   OK (When troubleshooting in accordance with the DTC CHART.)	A
   OK (When troubleshooting in accordance with the PROBLEM SYMPTOMS TABLE.)	B
   NG	C

B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

C: REPAIR OR REPLACE HARNESS OR CONNECTOR 

A: END