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Home >> Suzuki >> 2012 >> Equator Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Transfer (4WD) System) >> Diagnostic Information and Procedures >> ATP Warning Lamp Does Not Turn On >> Diagnosis Procedure
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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 SYSTEM FOR CAN COMMUNICATION LINE 
Perform "DTC check". Refer to [SDT FUNCTION (4WD) ].
Do "DTC check" results indicate CAN communication? 		 Perform trouble diagnosis for CAN communication line. Refer to [DTC INDEX: TRANSFER CONTROL UNIT ]. GO TO 2.
2  CHECK SYSTEM FOR 4WD SHIFT SWITCH 
Perform trouble diagnosis for 4WD shift switch system. Refer to [P1813 4WD SHIFT SWITCH ].
Are the inspection results normal? 		 GO TO 3. Repair or replace damaged parts.
3  CHECK SYSTEM FOR PNP SWITCH SIGNAL 
Perform trouble diagnosis for PNP switch signal system. Refer to [P1816 PNP SWITCH (A/T) ].
Are the inspection results normal? 		 GO TO 4. Repair or replace damaged parts.
4  CHECK SYSTEM FOR ATP SWITCH 
Perform trouble diagnosis for ATP switch system. Refer to [ATP SWITCH CIRCUIT CHECK ].
Are the inspection results normal? 		 GO TO 5. Repair or replace damaged parts.
5  CHECK ATP WARNING LAMP CIRCUIT 
  1. Disconnect ATP switch harness connector.
  2. Turn ignition switch "ON". (Do not start engine.)
  3. Ground terminal 8 on ATP switch connector F55 using suitable wiring.
G06444833Courtesy of SUZUKI OF AMERICA CORP.

  1. 4. Turn ignition switch "OFF". (Stay for at least 5 seconds.)

Does ATP warning lamp turn on? 		 GO TO 9. GO TO 6.
6  CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND COMBINATION METER 
  1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
  2. Disconnect transfer control unit harness connector and combination meter harness connector.
  3. Check continuity between transfer control unit harness connector M153 terminal 39 and combination meter harness connector M24 terminal 21.
G06444834Courtesy of SUZUKI OF AMERICA CORP.

Continuity should exist. 
Also check harness for short to ground and short to power.
Does continuity exist? 		 GO TO 7. Repair or replace damaged parts.
7  CHECK HARNESS BETWEEN COMBINATION METER AND ATP SWITCH 
  1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
  2. Disconnect ATP switch harness connector.
  3. Check continuity between combination meter harness connector M24 terminal 1 and ATP switch harness connector F55 terminal 8.
G06444835Courtesy of SUZUKI OF AMERICA CORP.

Continuity should exist. 
Also check harness for short to ground and short to power.
Does continuity exist? 		 GO TO 8. Repair or replace damaged parts.
8  SYMPTOM CHECK 
Check again.
Does the symptom still occur? 		 GO TO 9. Inspection End.
9  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 10. Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
10  CHECK TRANSFER INNER PARTS 
  1. Disassemble transfer assembly. Refer to [TRANSFER ASSEMBLY: DISASSEMBLY AND ASSEMBLY ].
  2. Check transfer inner parts.

Are the inspection results normal? 		 Inspection End. Repair or replace damaged parts.
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