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Home >> Suzuki >> 2009 >> Equator RMZ-4 >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (VQ40DE) - (5 Of 5) >> ASCD Brake Switch Circuit Check >> Diagnosis Procedure >> A/T Models

A/T Models

DIAGNOSIS PROCEDURE

Step Action YES NO
1  CHECK OVERALL FUNCTION-I 
  1. With SDT 
    1. Turn ignition switch ON.
    2. Select "BRAKE SW1" in "Data list" mode with SDT.
    3. Check "BRAKE SW1" indication under the following conditions.
G06441647G06441648G06441649Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

  1. 2) Without SDT 
    1. Turn ignition switch ON.
    2. Check voltage between ECM terminal 108 and ground under the following conditions.
G06441647G06441648G06441649Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.
G06441647G06441648G06441649Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

OK or NG 		 GO TO 2. GO TO 3.
2  CHECK OVERALL FUNCTION-II 
  1. With SDT 

    Check "BRAKE SW2" indication in "Data list" mode.

  2. Without SDT 

    Check voltage between ECM terminal 101 and ground under the following conditions.


OK or NG 		 INSPECTION END  GO TO 7.
3  CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT 
  1. Turn ignition switch OFF.
  2. Disconnect ASCD brake switch (1) harness connector.
G06441650G06441651Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.
  • Stop lamp switch (2)

  1. 3. Turn ignition switch ON.
  2. 4. Check voltage between ASCD brake switch terminal 1 and ground with SDT or tester.
G06441650G06441651Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

Voltage: Battery voltage 


OK or NG 		 GO TO 5. GO TO 4.
4  DETECT MALFUNCTIONING PART 
Check the following.
  • Fuse block (J/B) connector E160
  • 10 A fuse (No. 12)
  • Harness for open or short between ASCD brake switch and fuse
 Repair open circuit or short to ground in harness or connectors.  
5  CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check harness continuity between ECM terminal 108 and ASCD brake switch terminal 2.

    Refer to WIRING DIAGRAM .

    Continuity should exist. 

  4. Also check harness for short to ground and short to power.

OK or NG 		 GO TO 6. Repair open circuit or short to ground or short to power in harness or connectors.
6  CHECK ASCD BRAKE SWITCH 
Refer to [ASCD BRAKE SWITCH CIRCUIT CHECK ].
OK or NG 		 GO TO 11. Replace ASCD brake switch.
7  CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT 
  1. Turn ignition switch OFF.
  2. Disconnect stop lamp switch (2) harness connector.
G06441652G06441653Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.
  • ASCD brake switch (1)

  1. 3. Check voltage between stop lamp switch terminal 1 and ground with SDT or tester.
G06441652G06441653Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

Voltage: Battery voltage 


OK or NG 		 GO TO 9. GO TO 8.
8  DETECT MALFUNCTIONING PART 
Check the following.
  • Fuse block (J/B) connector E160
  • 10 A fuse (No. 20)
  • Harness for open or short between stop lamp switch and battery
 Repair open circuit or short to ground or short to power in harness or connectors.  
9  CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
  1. Disconnect ECM harness connector.
  2. Check harness continuity between ECM terminal 101 and stop lamp switch terminal 2.

    Refer to WIRING DIAGRAM .

    Continuity should exist. 

  3. Also check harness for short to ground and short to power.

OK or NG 		 GO TO 10. Repair open circuit or short to ground or short to power in harness or connectors.
10  CHECK STOP LAMP SWITCH 
Refer to [ASCD BRAKE SWITCH CIRCUIT CHECK ].
OK or NG 		 GO TO 11. Replace stop lamp switch.
11  CHECK INTERMITTENT INCIDENT 
Refer to [SERVICE INFORMATION FOR ELECTRICAL INCIDENT: INTERMITTENT INCIDENT ]		 INSPECTION END   
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