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Home >> Suzuki >> 2006 >> Grand Vitara XSport, RWD >> Repair and Diagnosis (Single Page) >> Brakes >> Anti-Lock Brakes >> Brakes - Abs >> Diagnostic Information And Procedures >> DTC C1021, C1022/C1025, C1026/C1031, C1032/C1035, C1036: Right-Front/Left-Front/Right-Rear/Left-Rear Wheel Speed Sensor Circuit Or Encoder Failure >> DTC Troubleshooting
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DTC Troubleshooting

TROUBLESHOOTING CHART

Step Action YES NO
1  Was "ABS Check" performed?  Go to Step 2. Go to ABS CHECK .
2 
  1. Turn ignition switch OFF.
  2. Disconnect ABS (ESP®) control module connector.
  3. Check for proper connection to ABS (ESP®) control module at each sensor terminal.
  4. If OK, then turn ignition switch ON and measure voltage between applicable sensor terminal of module connector and vehicle body ground.

Is it 0 V? 		 Go to Step 4. ABS wheel speed sensor circuit shorted to power.
3 
  1. Disconnect applicable wheel speed sensor coupler with ignition switch OFF.
  2. Measure resistance between the following points.
    • Both ABS (ESP®) control module connector (1) terminals a pair of applicable sensor terminals. This check result should be no continuity.
    • Between applicable sensor terminal of ABS (ESP®) control module connector and vehicle body ground. This check result should be no continuity.
    • Between applicable sensor terminal of module connector and corresponding terminal of wheel speed sensor connector (2) in main harness (for front sensor) or floor harness (for rear sensor). This check result should be continuity.
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Are each check results OK? 		 Go to Step 4. Circuit open or short to ground.
4 
  1. Remove applicable wheel speed sensor.
  2. Check sensor for damage or foreign material attached.

Is it in good condition? 		 Go to Step 5. Clean, repair or replace.
5  Check front and/or rear encoder for the following (remove front and/or rear drive shaft):
  • Encoder surface neither crack nor damaged
  • No foreign material being attached
  • Encoder not being eccentric
  • Wheel bearing free from excessive play

Are they in good condition? 		 Go to Step 6. Clean, repair or replace wheel hub assembly.
6 
  1. Install wheel speed sensor to knuckle.
  2. Tighten sensor bolt to specified torque and check that there is no clearance between sensor and knuckle.

Is it OK? 		 Go to Step 7. Replace ABS wheel speed sensor.
7  Refer to FRONT WHEEL SPEED SENSOR ON-VEHICLE INSPECTION  and/or REAR WHEEL SPEED SENSOR ON-VEHICLE INSPECTION , check output voltage or waveform.
Is specified voltage and/or waveform obtained? 		 Substitute a known-good ABS (ESP®) hydraulic unit/control module assembly and recheck. Replace sensor and recheck.
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