Prelude L4-2056cc DOHC (1990)
Technical Service Bulletin # 90038
Date: 910816
Brakes - Anti-Lock Brake Problem Code 1/Leaking Solenoid
Bulletin No.
90-038
File Under
BRAKES
Issue Date
AUG 16, 1991
Model
'90-91
PRELUDE
'91
ACCORD SE
Applicable To
with ALB
Anti-lock Brake Problem Code 1/Leaking Solenoid (Supersedes 90-038, dated June 21, 1991)
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 may be
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 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 or replace the solenoids.
Solenoid Leak Check (Accord/Prelude)
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 (Prelude) or the ALB B2 fuse from the ALB fuse box (Accord) 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 07HAJ-SG0010A or B, 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.
