Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.

Regarding Wiring Diagram information, refer to [TRANSFER CONTROL UNIT: WIRING DIAGRAM ].

DIAGNOSIS PROCEDURE

Step	Action	YES	NO
1	CHECK ACTUATOR POSITION SWITCH SIGNAL With SDT Start engine. Depress brake pedal and stop vehicle. Set A/T selector lever to "N" position. Select "Data list" mode for "4WD" with SDT. Read out the value of "SHIFT POS SW1", "SHIFT POS SW2", "SHIFT POS SW3", "SHIFT POS SW4". Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. 2) Without SDT Start engine. Depress brake pedal and stop vehicle. Set A/T selector lever to "N" position. Check voltage between transfer control unit harness connector terminal and ground. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Are the inspection results normal?	GO TO 4.	GO TO 2.
2	CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND ACTUATOR POSITION SWITCH Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect transfer control unit harness connector and the transfer control device (actuator position switch) harness connector. Check continuity between the following terminals. Courtesy of SUZUKI OF AMERICA CORP. Transfer control unit harness connector M152 terminal 10 and transfer control device (actuator position switch) harness connector F58 terminal 26. Transfer control unit harness connector M152 terminal 11 and transfer control device (actuator position switch) harness connector F58 terminal 20. Transfer control unit harness connector M152 terminal 12 and transfer control device (actuator position switch) harness connector F58 terminal 21. Transfer control unit harness connector M152 terminal 13 and transfer control device (actuator position switch) harness connector F58 terminal 25. Continuity should exist. Also check harness for short to ground and short to power. Is there continuity?	GO TO 3.	Repair or replace damaged parts.
3	CHECK GROUND CIRCUIT Turn ignition switch "OFF". (Stay for at least 5 seconds.) Check continuity between transfer control device (actuator position switch) harness connector F58 terminal 22 and ground. Courtesy of SUZUKI OF AMERICA CORP. Continuity should exist. Also check harness for short to power. Is there continuity?	GO TO 4.	Repair open circuit or short to power in harness or connectors.
4	CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to [TRANSFER CONTROL UNIT: REFERENCE VALUE ]. Are the inspection results normal?	GO TO 5.	Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
5	CHECK DTC Perform "DTC check", after driving a vehicle for a while. Is DTC P1818 displayed?	Replace transfer control device. Refer to [TRANSFER CONTROL DEVICE: REMOVAL AND INSTALLATION ].	Inspection End.