Creep Aid System Solenoid Valves A and B Troubleshooting

Creep Aid System Solenoid Valves A and B Troubleshooting
1. Turn the ignition switch OFF.
2. Raise the front and rear of the vehicle, and make sure it is securely supported.
3. Disconnect the creep aid system solenoid connector.





4. Check for creep aid system solenoid valve A operation by connecting the battery positive terminal to creep aid system solenoid connector terminal No. 2, and connecting the battery negative terminal to the connector terminal No. 4. Check for the solenoid valve B operation with connecting the battery positive terminal to the connector terminal No. 1, and connecting the connector terminal No. 3.
Is a clicking sound heard when connecting battery terminals?
YES-Go to step 5.
NO-Replace the creep aid system solenoid valves A and B.
5. While connecting the battery positive terminal to the connector terminals No. 1 and No. 2, and connecting the battery negative terminal to the connector terminal No. 2 and No. 4, press the brake pedal.





6. Release the brake pedal, and check the application of the brake by rotating the wheel by hand. Repeat the same test for all wheels. All the wheels should stay locked for 1 second after the brake pedal released.
Do the brakes operate properly ?
YES-The brake system and the creep aid system operate properly.
NO-The brakes on the right front wheel and the left rear wheel or on the left front wheel and right rear wheel drag, replace the creep aid system valve body. If the brake on the one of the wheels or all wheels drag, inspect the brake systems