Anti-lock Brake System Indicator Light
Temporary Driving Conditions:
1. The anti-lock brake system indicator light will come
on and the control unit memorizes the problem
under certain conditions.
NOTE: Problem codes are explained on pages
19 – 46.
The tire(s) adhesion is lost due to excessive cor-
Problem codes: 5, 5-4, 5-8.
The vehicle loses traction when starting from a
stuck condition on a muddy, snowy, or sandy
Problem code: 4-1, 4-2, 4-4, 4-8.
When the parking brake is applied for more than
30 seconds while the vehicle is being driven.
Problem code: 2.
The vehicle is driven on extremely rough road.
The anti-lock brake system is OK, if the anti-lock
brake system indicator light goes off after the
engine is restarted.
ANTI-LOCK BRAKE SYSTEM INDICATOR LIGHT
2. If you receive a customer’s report that the anti-lock
brake system indicator light sometimes comes on,
check the system using the ALB checker to confirm
whether there is any trouble in the system.
See page 19 – 41.
3. The anti-lock brake system indicator light will come
on and the control unit will store a problem code
when there is insufficient battery voltage to the
control unit. An example would be when the bat-
tery is so weak that the car must be jump-started.
After the battery is sufficiently recharged, the anti-
lock brake system indicator light will work normally
after the engine is stopped and restarted.
However, after recharging the battery, the problem
code must be cleared from the control unit’s
memory by disconnecting the ALB 2,3 (No. 32)
fuse for at least 3 seconds.
Anti-lock Brake System Indicator Light Circuit:
CAUTION: Use only the digital multimeter to
check the system.
1. The indicator light does not go on when the ignition
switch is turned on.
Check the following items. If they are OK, check
the control unit connectors.
If not loose or disconnected, install a new control
unit and recheck:
Blown anti-lock brake system indicator light
Open circuit in YEL wire between No. 5 (10 A)
fuse and gauge assembly.
Open circuit in BLU/WHT wire between gauge
assembly and control unit.
Loose component grounding of the control unit
to the body.
2. The anti-lock brake system indicator light remains
ON after the engine is started, however the anti-
lock brake system indicator light does not blink any
code or sub-code. Check the following items:
Loose or poor connection of the wire harness at
the control unit.
Faulty ALB 2,3 (No. 32) fuse.
Open circuit in WHT/BLK wire between ALB 2,3
(No. 32) fuse and control unit.
Open circuit in YEL/BLK wire between fuse No.
4 (1 5 A) and control unit.
Short circuit in BLU/WHT wire between gauge
assembly and control unit.
Open circuit in WHT/BLU wire between alter-
nator and control unit.
If the problem is not found substitute a known-good
control unit and recheck whether the warning light re-
Comes on and remains on while running:
1. Stop the engine.
2. Turn the ignition switch on and make sure that the anti-lock brake system indicator light comes on.
3. Restart the engine and check the anti-lock brake system indicator light.
There is no problem in the anti-lock brake system, if the anti-lock brake system indicator light goes off.
Go to step 4, if the anti-lock brake system indicator light remains on.
4. Stop the engine.
5. Disconnect the service check connector from the connector cover located under the glove box.
Connect the two terminals of the service check connector with a jumper wire.
6. Turn the ignition switch on, but do not start the engine.
7. Record the blinking frequency of the anti-lock brake system indicator light.
The blinking frequency indicates the problem code.
CAUTION: Before starting the engine, disconnect the jumper wire from the service check connector, or else the
Check Engine light will stay on with the engine running.
Turn the ignition
Main Code: 4
Main Code: 1
Main Code: 7
The control unit can indicate three problem codes (one, two or three problems).
If the anti-lock brake system indicator light does not light, see Troubleshooting of Anti-lock Brake System
Indicator Light Circuit page 19-44.
If you miscount the blinking frequency, turn the ignition switch off, then turn on to blink the anti-lock brake
system indicator light again.
After the repair is completed, disconnect the ALB 2,3 (No. 32) fuse for at least 3 seconds to erase the control
unit’s memory. Then turn the ignition key on again and recheck.
The memory is erased if the connector is disconnected from the control unit or the control unit is removed from
After recording the main and sub-code (if applicable), refer to the Symptom-to-System Chart.
ANTI-LOCK BRAKE SYSTEM INDICATOR LIGHT SERVICE CHECK CONNECTOR