Brakes - Anti-Lock Brake Problem Code 1/Solenoid Leak
90honda06Model Applicable To
'90-91 WITH
PRELUDE ALB
File Under Bulletin No.
90-038
BRAKES Issue Date
DEC. 7, 1990
Anti-lock Brake Problem Code 1 / Leaking Solenoid
SYMPTOM
The ALB indicator light comes on and the ALB control unit indicates Problem Code 1. In some cases, the top of the ALB modulator reservoir is wet with brake fluid.
NOTE:
^ This bulletin addresses a possible cause for ALB Problem Code 1 that is not covered in the service manual.
^ The LED on the ALB control unit (located in the center console) displays problem codes once, each time the ignition switch is turned on. The code appears 10 seconds after the ignition switch is turned on. Have an assistant turn the ignition switch on while you watch the LED.
PROBABLE CAUSE
A leaking modulator solenoid prevents the pump from pressurizing the accumulator to the prescribed level within the pump running limit of 120 seconds.
CORRECTIVE ACTION
Perform a solenoid leak check and, if necessary, flush the solenoids.
Solenoid Leak Check
1. Place the car on level ground with the wheels blocked. Put the transmission in neutral (M/T models) or Park (A/T models).
2. Record the fluid levels in the modulator and the master cylinder reservoirs.
3. Remove the ALB 27 fuse from the under-hood relay box for at least three seconds to erase the control unit's memory. Reinstall the fuse.
4. Remove the modulator reservoir filter.
5. Connect the ALB Checker, T/N O7HAJSG0010A, and turn the Mode Selector to "1."
6. Start the engine and release the parking brake. Push the Start Test button on the ALB Checker.
^ If the ALB pump runs, note when it starts, and quickly go to step 7.
^ If the ALB pump doesn't run, the cause of the Code 1 has corrected itself. Refill the modulator reservoir to the MAX level, and return the car to the customer.
7. While the ALB pump is running, place your finger over the top of the solenoid return tube in the modulator reservoir. Note when the pump stops.
^ If you can feel brake fluid coming from the return tube, one of the solenoids is leaking. Go to Solenoid Flushing.
^ It you feel no fluid coming from the return tube and the pump runs for less than 120 seconds, the cause of the Code 1 has corrected itself. Refill the modulator reservoir to the MAX level, and return the car to the customer.
^ If you feel no fluid coming from the return tube, and if the pump runs for 120 seconds (ALB warning light comes on, LED indicates Code 1), call Engineering Tech Line with the fluid levels you recorded in step 2.
Solenoid Flushing
1. Remove the pump relay from the under-hood relay box.
2. Insert a spare blade terminal into each of the two rear pump relay terminal cavities in the under-hood relay box. Connect a remote starter switch to the blade terminals. This is now the "pump relay switch."
3. Disconnect the three modulator solenoid connectors.
4. Connect the RED terminal from one solenoid to the battery positive (+) terminal with a remote starter switch. This is now the "solenoid switch." Connect the BLK terminal from the same solenoid to the battery negative terminal with a jumper lead.
5. Bleed any high pressure fluid from the maintenance bleeder with the ALB T-wrench, T/N 07HAA-SG00101.
6. Press the pump relay switch to run the pump. After the pump has run for about five seconds, press and release the solenoid switch rapidly for 10 to 15 seconds to open and close the solenoid. Continue running the pump for about 30 seconds, then release the pump relay switch and open and close the solenoid rapidly for another 10 to 15 seconds.
7. Repeat steps 4-6 for the other two solenoids.
8. Reconnect the solenoids and the pump relay.
9. Connect the ALB Checker and turn the Mode Selector to "1." Start the engine and release the parking brake. Push the Start Test button on the ALB Checker.
10. While the ALB pump is running, place your finger over the top of the solenoid return tube in the modulator reservoir and check for leaks.
^ If the solenoid leakage has stopped, refill the modulator reservoir to the MAX level, and return the car to the customer.
^ If a solenoid is still leaking, call the Engineering Tech Line with the fluid levels you recorded in step 2 of the Solenoid Leak Check.
WARRANTY CLAIM INFORMATION
In warranty: The normal warranty applies.
Out-of-warranty: Any repair performed after warranty expiration may be eligible for goodwill consideration by the District Service Manager. You must request consideration, and get the DSM's decision, before starting work.
Operation Description Flat Rate
Number Time
413065 Leak Check 0.3 hour
413066 Leak Check and 0.9 hour
Flushing
Failed P/N: 57110-SF1-806
H/C 3430402
Defect code: 060
Contention code: B99