C1258

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1258/58: Transfer 4WD Position Switch Circuit

DTC C1258/58 - Transfer 4WD Position Switch Circuit

DESCRIPTION

This circuit monitors whether the transfer is in 2WD or 4WD mode and inputs the signal to the skid control ECU. In 2WD mode, TRAC is activated.
In 4WD mode, A-TRAC is activated.





WIRING DIAGRAM





INSPECTION PROCEDURE

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

PROCEDURE

1. CONFIRM VEHICLE TYPE
(a) Confirm the vehicle drive train.





B -- CHECK HARNESS AND CONNECTOR (NEO TERMINAL - BODY GROUND)
A -- Continue to next step.
2. INSPECT SKID CONTROL ECU (EXI TERMINAL VOLTAGE)





(a) Disconnect the skid control ECU connector.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage.
Standard:





(d) Turn the ignition switch to OFF.
(e) Reconnect the skid control ECU connector.
NG -- INSPECT TRANSFER INDICATOR SWITCH (4WD POSITION)
OK -- Continue to next step.
3. RECONFIRM DTC
(a) Clear the DTCs (Reading and Clearing Diagnostic Trouble Codes).
(b) Check if the same DTCs are recorded.





B -- END
A -- REPLACE MASTER CYLINDER SOLENOID
4. INSPECT TRANSFER INDICATOR SWITCH (4WD POSITION)





(a) Disconnect the transfer indicator switch (4WD position) connector.
(b) Remove the transfer indicator switch (4WD position).
(c) Measure the voltage.
Standard:





(d) Reinstall the transfer indicator switch (4WD position).
(e) Reconnect the transfer indicator switch (4WD position) connector.
NG -- REPLACE TRANSFER INDICATOR SWITCH (4WD POSITION)
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - ECM)





(a) Disconnect the skid control ECU connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance.
Standard (1GR-FE):





Standard (2TR-FE):





(d) Reconnect the ECM connector.
(e) Reconnect the skid control ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
6. 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) Measure the resistance.
Standard :





(d) Reconnect the 4WD control ECU connector.
(e) Reconnect the skid control ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- END
7. CHECK HARNESS AND CONNECTOR (NEO TERMINAL - BODY GROUND)





(a) Disconnect the skid control ECU connector.
(b) Measure the resistance.
Standard:





(c) Reconnect the skid control ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
8. RECONFIRM DTC
(a) Clear the DTCs (Reading and Clearing Diagnostic Trouble Codes).
(b) Check if the same DTCs are recorded.





B -- END
A -- REPLACE MASTER CYLINDER SOLENOID