DTC C1258/58 Transfer 4WD Position Switch Circuit; DTC C1282/82 Center Differential Lock Position Switch Malfunction (Test Mode DTC): Procedure

1. Disconnect the skid control ECU connector.
2. Turn the ignition switch to ON.
3. Measure the voltage.
   Standard voltage:
   
   

   Tester Connection	Transfer Condition	Specified Condition
   A4-27 (EXI) - Body ground	L4	Below 1.5 V
   A4-27 (EXI) - Body ground	Other than above	8 to 14 V

   NG: INSPECT TRANSFER INDICATOR SWITCH (for L4 POSITION) 

1. Check if the test mode DTC (C1283/83) is detected.
   Result:
   
   

   Result	Proceed to
   Test mode DTC (C1283/83) not output	A
   Test mode DTC (C1283/83) output	B

   B: REPAIR TRANSFER INDICATOR SWITCH CIRCUIT (for L4 POSITION) 

2. A/T:
   1. Move the transfer high and low shift lever to the H2, H4, and L4 ranges, and measure the voltages in each range.

      Standard voltage 

      VOLTAGE SPECIFICATION - A/T
      
      

      Tester Connection	Transfer Range	Specified Condition
      A4-27 (EXI) - Body ground	H2	8 to 14 V
      A4-27 (EXI) - Body ground	H4, L4	Below 1.5 V

1. Clear the DTC.
2. Check if the same DTC is recorded.

   Result: 

   RESISTANCE SPECIFICATION
   
   

   Result	Proceed to
   DTC output	A
   DTC not output	B

A: REPLACE MASTER CYLINDER SOLENOID 

B: END 

Fig 1: Identifying Transfer Indicator Switch Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the transfer indicator switch (for L4 position) connector.
2. Remove the transfer indicator switch (for L4 position).
3. Measure the resistance.

   Standard resistance: 

   RESULT CHART
   
   

   Tester Connection	Switch Position	Specified Condition
   1 - 2	Pushed	Below 1 Ω
   1 - 2	Free	10 kΩ or higher

NG: REPLACE TRANSFER INDICATOR SWITCH (for L4 POSITION) 

1. Disconnect the transfer indicator switch (4WD position) connector.
Fig 2: Checking Harness And Connector (1 of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 3: Checking Harness And Connector (2 of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the transfer indicator switch (for L4 position) connector.
3. Measure the resistance.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   A4-27 (EXI) - B40-1	Below 1 Ω
   A4-27 (EXI) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 4: Checking Harness And Connector (Skid Control ECU - ECM)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the skid control ECU connector.
2. Disconnect the ECM connector.
3. Measure the resistance.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   A4-27 (EXI) - B3-13 (L4)	Below 1 Ω
   A4-27 (EXI) - Body ground	10 kΩ or higher
   B3-13 (L4) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE MASTER CYLINDER SOLENOID 

1. Disconnect the skid control ECU connector.
Fig 5: Identifying Skid Control ECU Connector And 4WD Control ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the 4WD control ECU connector.
3. Measure the resistance.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   A4-27 (EXI) - B4-8 (ADD)	Below 1 Ω
   A4-27 (EXI) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the four wheel drive control ECU.

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

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   DTC output	A
   DTC not output	B

B: END 

A: REPLACE MASTER CYLINDER SOLENOID  (See DISASSEMBLY )

1. Disconnect the transfer indicator switch (center differential lock position) connector.
Fig 6: Identifying Transfer Indicator Switch (For Center Differential Lock Position)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Remove the transfer indicator switch (center differential lock position).
3. Measure the resistance.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Switch Position	Specified Condition
   1-2	Pushed	Below 1 Ω
   1-2	Released	10 kΩ or higher

NG: REPLACE TRANSFER INDICATOR SWITCH (for CENTER DIFFERENTIAL LOCK POSITION)  (See DISASSEMBLY (VF4B) or DISASSEMBLY (VF2A) )

OK: Go to next step 

1. Disconnect the skid control ECU connector.
Fig 7: Identifying Skid Control ECU Connector And Transfer Indicator Switch (Center Differential Lock Position) Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the transfer indicator switch (center differential lock position) connector.
3. Measure the resistance.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   A4-27 (EXI) - B43-2	Below 1 Ω
   A4-27 (EXI) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

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

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   DTC output	A
   DTC not output	B

B: END 

A: REPLACE MASTER CYLINDER SOLENOID  (See DISASSEMBLY )