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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 TRANSFER CONTROL UNIT POWER SUPPLY AND GROUND CIRCUITS 
Refer to [P1801, P1811 POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT ].
Are the inspection results normal? 		 GO TO 2. Perform repairs as necessary.
2  CHECK COMBINATION METER POWER SUPPLY CIRCUIT 
  1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
  2. Disconnect combination meter harness connector.
  3. Check voltage between combination meter harness connector terminals and ground.
G06444821G06444822G06444823G06444824Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.
G06444821G06444822G06444823G06444824Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

  1. 4. Turn ignition switch "ON". (Do not start engine.)
G06444821G06444822G06444823G06444824Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

  1. 5. Check voltage between combination meter harness connector terminals and ground.
G06444821G06444822G06444823G06444824Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

Are the inspection results normal? 		 GO TO 3. Check the following. If any items are damaged, repair or replace damaged parts. 
  • 10A fuse [No. 14, located in the fuse block (J/B)] or ignition switch.
  • Harness for short or open between ignition switch and combination meter harness connector terminal 16
3  CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND COMBINATION METER 
  1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
  2. Check continuity between transfer control unit harness connector M153 terminal 38 and combination meter harness connector M24 terminal 26.
G06444825Courtesy of SUZUKI OF AMERICA CORP.

Continuity should exist. 
Also check harness for short to ground and short to power.
Is there continuity? 		 GO TO 4. Repair or replace damaged parts.
4  CHECK INDICATOR LAMP CIRCUIT 
  1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
  2. Connect combination meter harness connector.
  3. Disconnect transfer control unit harness connector.
  4. Turn ignition switch "ON". (Do not start engine.)
  5. Ground the following terminal using suitable wiring.
G06444826Courtesy of SUZUKI OF AMERICA CORP.

  • Transfer control unit harness connector M153 terminal 38 and ground.

Does the indicator lamp turn on? 		 GO TO 5. Replace the combination meter. Refer to [COMBINATION METER: REMOVAL AND INSTALLATION ]
5  SYMPTOM CHECK 
Check again.
Does the symptom still occur? 		 GO TO 6. Inspection End.
6  CHECK TRANSFER CONTROL UNIT 
Check transfer control unit input/output signal. Refer to [TRANSFER CONTROL UNIT: REFERENCE VALUE ].
Are the inspection results normal? 		 Inspection End. Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
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