Diagnostic procedure
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STEP
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INSPECTION
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ACTION
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|---|---|---|---|
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1
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VERIFY CURRENT INPUT SIGNAL STATUS IS CONCERN INTERMITTENT OR CONSTANT
• Turn ignition key to OFF.
• Connect SST (WDS) to DLC-2.
• Start engine and drive vehicle.
• Access LF WSPD, LR WSPD, RF WSPD and RR WSPD PID using SST (WDS)
• Do vehicle speeds correspond approximately to the four PIDs above?
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Yes
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Inspect intermittent concern using the same procedure as engine control system.
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No
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PID(s) indicates 0 km/h {0 mph} during driving:
• Go to next step
PID(s) are not equal:
• Go to Step 7
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2
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INSPECT ABS WHEEL-SPEED SENSOR CIRCUIT FOR SHORT TO GROUND
• Turn ignition key to OFF.
• Disconnect ABS/TCS HU/CM or ABS HU/CM connector.
• Connect SST (adapter harness) to ABS/TCS HU/CM or ABS HU/CM connector (harness side).
• Inspect continuity between suspected sensor terminal(s) of SST (adapter harness) and ground(s).
• Is there continuity?
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Yes
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Go to next step.
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No
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Go to Step 4.
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3
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INSPECT ABS WHEEL-SPEED SENSOR FOR SHORT TO GROUND
• With ignition key at OFF, disconnected suspected sensor connector(s), inspect continuity between suspected sensor terminal(s) 1 (part side) and ground(s).
• Is there continuity?
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Yes
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Replace ABS wheel-speed sensor(s), then go to Step 10.
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No
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Repair or replace harness (short to ground) between ABS/TCS HU/CM or ABS HU/CM and ABS wheel-speed sensor connector(s), then go to Step 10.
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4
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INSPECT ABS WHEEL-SPEED SENSOR
• Measure resistance between suspected sensor terminals of SST:
• Is resistance within 1.3-1.7 kilohm?
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Yes
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Go to Step 6.
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No
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Go to next step.
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5
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INSPECT ABS WHEEL-SPEED SENSOR
• With ignition key at OFF and disconnect suspected ABS wheel-speed sensor connector, measure resistance between sensor terminals (part side).
• Is resistance within 1.3-1.7 kilohm?
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Yes
|
Repair or replace harness for short to ground circuit between ABS/TCS HU/CM or ABS HU/CM to ABS wheel-speed sensor power circuit and ground circuit, then go to Step 10.
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No
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Replace ABS wheel-speed sensor, then go to Step 10.
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6
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INSPECT SENSOR ROTOR CLEARANCE
• Jack-up vehicle and support it with safety stands.
• Remove suspected wheel(s).
• Inspect clearance between sensor and rotor.
• Is clearance within 0.3-1.1 mm {0.12-0.043 in}?
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Yes
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Go to Step 10.
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No
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Replace ABS wheel-speed sensor(s), then go to Step 10.
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7
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INSPECT ABS WHEEL-SPEED SENSOR OUTPUT PULSE
• Start engine and drive vehicle.
• Inspect output voltage pattern using an oscilloscope.
• Is output voltage pattern okay?
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Yes
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Go to Step 10.
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No
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Go to Step 6.
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8
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INSPECT SENSOR ROTOR FOR DAMAGE
• Jack-up vehicle and support it with safety stands.
• Remove suspected wheel(s).
• Visually inspect sensor rotor for missing, deformed and obstructed teeth.
Number of teeth: 44
• Is sensor rotor okay?
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Yes
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Go to next step.
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No
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Replace rotor, then go to Step 10.
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9
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INSPECT SENSOR ROTOR CLEARANCE
• Inspect clearance between sensor and rotor.
• Is clearance within 0.3-1.1 mm {0.12-0.043 in}?
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Yes
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Go to next step.
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No
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Replace ABS wheel-speed sensor, then go to next step.
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10
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VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnected all disconnected connectors.
• Clear DTC from memory
(See Clearing DTCs Procedure)
• Start engine and drive vehicle at 10 km/h {6.2 mph} or above.
• Gradually slow down vehicle and stop.
• Is same DTC present?
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Yes
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Replace ABS/TCS HU/CM or ABS HU/CM, then go to next step.
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No
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Go to next step.
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11
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VERIFY AFTER REPAIR PROCEDURE
• Is there any other DTC present?
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Yes
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Go to applicable DTC inspection.
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No
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Troubleshooting completed.
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