Prelude L4-2056cc DOHC (1990)
Hydraulic Control Assembly - Antilock Brakes: Customer Interest
Brakes - Anti-Lock Brake Problem Code 1/Solenoid Leak
Model
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.
