Component Tests and General Diagnostics
ABS FUNCTION TEST
NOTE: The ABS system can be checked with the ALB checker or with the Honda PGM Tester.
1. Raise the car off the ground, and support it with safety stands.
2. Check that there is no brake drag.
3. Turn the ignition switch ON (II), and confirm that the ABS indicator light comes on.
- If the ABS indicator light does not come on, follow the troubleshooting description. Manufacturer Codes
4. With the ignition switch OFF, disconnect the ABS inspection connector (6P) from the connector cover located under the glove box, and connect it to the ALB checker.
5. Shift the transmission to [P] position.
6. Start the engine and release the parking brake.
7. Turn the Mode Selector switch to "1".
8. Push the Start Test switch.
The ABS indicator light should not come on while the Test in Progress light is on.
- If the ABS indicator light comes on, confirm the DTC and perform the appropriate troubleshooting for the code.
NOTE: Do not turn the Mode Selector switch when the Test in Progress light is on. Damage to the ALB checker can result.
9. Turn the Mode Selector switch to "2".
10. Depress the brake pedal firmly, and push the Start Test switch. The ABS indicator light should not come on while the Test in Progress light is on. There should be kickback on the brake pedal.
Have the assistant check that the wheel controlled by the ABS can be rotated by hand when there is kickback on the brake pedal.
- If the ABS indicator light comes on, confirm the DTC and perform the appropriate troubleshooting for the code.
- If the ABS indicator light does not come on and the wheel controlled by the ABS cannot be rotated, check the connection of the modulator wire harness connectors. If the connections are OK, replace the modulator unit.
NOTE: The kickback should occur approximately 20 seconds after the Start Test switch is pushed. The ABS can be checked with a brake tester, too, by checking the brake torque fluctuation of the wheel controlled by the ABS.
11. Turn the Mode Selector switch to "3", "4" and "5". Perform step 10 for each of the test mode positions.
Operation Sequence Simulated by Modes of ALB Checker
NOTE: The wheel sensors and sensor wire harnesses are not checked by the ALB checker.
Inspection Points
If the ABS indicator light comes on and the system stops during the inspection, confirm the DTC and perform the appropriate troubleshooting for the code.
If there is no kickback in modes 2 through 5, and the ABS indicator light does not come on, the following items are probable causes:
- Pressure switch stuck ON
- Clogged or stuck solenoid outlet valve
- Modulator wire harness connectors improperly connected
Modulator Function Check
NOTE: This inspection determines whether the basic brake system continues to operate normally when the modulator unit fluid pressure is low.
CAUTION:
- This inspection is made by relieving the high-pressure fluid in the modulator unit and checking for brake operation. After inspection, be sure to add fresh brake fluid to the specified level of the reservoir, and start the engine to restore the ABS to its normal operating condition.
- Do not spill brake fluid on the vehicle; it may damage the paint; if brake fluid does contact the paint, wash it off immediately with water.
- Do not reuse the drained brake fluid.
- Do not loosen the relief plug on the accumulator.
1. Remove the bleeder cap from the maintenance bleeder on the modulator unit.
2. Attach the wrench to the maintenance bleeder.
3. Connect a rubber tube of the appropriate diameter to the maintenance bleeder, and set the other end of the rubber tube in a suitable container.
4. While holding the rubber tube with your hand, slowly loosen the maintenance bleeder 1/8 to 1/4 turn to collect the brake fluid in the container.
CAUTION: Do not loosen the maintenance bleeder too much. The high-pressure brake fluid can burst out.
5. After the brake fluid stops flowing out, loosen the maintenance bleeder more to release the pressure completely.
6. Tighten the maintenance bleeder to the specified torque.
7. Raise the vehicle off the ground, and support it with safety stands.
8. Have an assistant depress the brake pedal firmly, and check that the wheels do not rotate.
9. Remove the cap, and refill the reservoir to the MAX (upper) level with fresh brake fluid.
NOTE: Pour the brake fluid slowly so that it does not foam, and wait for a few minutes.
10. Start the engine and let it idle for a minute. Stop the engine.
11. Check the brake fluid level in the reservoir. It should be below the MAX (upper) level line. Refill the reservoir with fresh brake fluid to the MAX level line again.
12. After inspection, start the engine and make sure that the ABS indicator light goes off.