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Check if the tight corner braking phenomenon occurs during driving on a flat road with the 4WD switch being on the 4WD ECO or 4WD LOCK position.
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Q.
Does the tight corner braking phenomenon occur?
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This diagnosis is complete.
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(1)Check the wiring harness between the 4WD-ECU connector (terminal SOL+, SOL-) and the electronic control coupling solenoid connector for damage or other problem.
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(2)Check the connector(s) or terminal(s) or wiring harness above for damage or other problem.
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Q.
Is the check result normal?
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Repair the connector(s) or terminal(s) or wiring harness.
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Check the data list for the items below (Refer to ).
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- Item No.8: Steering angle sensor
- Item No.11: Accelerator position
- Item No.18: FL wheel speed sensor
- Item No.19: FR wheel speed sensor
- Item No.20: RL wheel speed sensor
- Item No.21: RR wheel speed sensor
- Item No.22: Yaw rate sensor
- Item No.23: Lateral G sensor
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Q.
Is the check result normal?
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Perform the troubleshooting of the ABS system (Refer to GROUP 35B - Troubleshooting/Diagnosis Code Chart <Vehicles with ABS>), the ASC system (Refer to GROUP 35C - Troubleshooting/Diagnosis Code Chart <Vehicles with ASC>) or the engine control system (Refer to GROUP 13A - Troubleshooting/Inspection Chart for Diagnosis Code <4B1>, GROUP 13B -Troubleshooting/Inspection Chart for Diagnosis Code <6B3>). Then go to Step 4.
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Check if the tight corner braking phenomenon occurs during driving on a flat road with the 4WD switch being on the 4WD ECO.
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Q.
Does the tight corner braking phenomenon occur?
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YES (Coil current in the electronic control coupling solenoid is 0 A) : Measure the coil current when the tight corner braking occurs. If the coil current measures 0 A, replace the electronic control coupling (Refer to ). Then go to Step 5.
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YES (Coil current in the electronic control coupling solenoid is other than 0 A) : Measure the coil current when the tight corner braking occurs. If the coil current is other than 0 A, go to Step 5.
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This diagnosis is complete. Then go to Step 6.
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Q.
Does the malfunction occur again?
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Replace 4WD-ECU (Refer to ). Then go to Step 6 .
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The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/How to Cope with Intermittent Malfunctions ).
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Q.
Does the malfunction occur again?
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Replace the electronic control coupling (Refer to ). Then go to Step 7.
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This diagnosis is complete.
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Q.
Does the malfunction occur again?
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Diagnose again from Step 1.
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This diagnosis is complete.
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