C1268

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1268/68: Transfer "L4" Position Switch Circuit

DTC C1268/68 - Transfer "L4" Position Switch Circuit

DESCRIPTION

After confirming that the transfer is in the L4 position, A-TRAC and downhill assist control will be activated according to the vehicle conditions. Description and Operation





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTE: When replacing the master cylinder solenoid, perform zero point calibration Programming and Relearning.

PROCEDURE

1. INSPECT 4WD CONTROL SWITCH
(a) Check the select high-low system or the select 2-4 and high-low system .

NG -- REPLACE 4WD CONTROL SWITCH
OK -- Continue to next step.

2. INSPECT 4WD CONTROL SWITCH (GND TERMINAL)




(a) Disconnect the 4WD control switch connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (4WD CONTROL ECU - 4WD CONTROL SWITCH)




(a) Disconnect the 4WD control ECU connector and 4WD control switch connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. INSPECT 4WD CONTROL ECU
(a) Check the select high-low system or the select 2-4 and high-low system .

NG -- REPLACE 4WD CONTROL ECU
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - 4WD CONTROL ECU)
(a) Disconnect the skid control ECU connector.
(b) Disconnect the 4WD control ECU connector.
(c) Disconnect the ECM connector.




(d) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

6. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - ECM)
(a) Disconnect the skid control ECU connector.
(b) Disconnect the 4WD control ECU connector.




(c) Disconnect the ECM connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

7. INSPECT SKID CONTROL ECU (EXI4 TERMINAL)




(a) Disconnect the skid control ECU connector.
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:





NG -- REPLACE ECM
OK -- REPLACE MASTER CYLINDER SOLENOID