Nubira SX Hatchback L4-2.0L DOHC D-TEC MFI (1999)
Brake Warning Indicator: Testing and Inspection
BRAKE LAMP WARNING CIRCUIT DIAGNOSIS
Test Description
The number(s) below refer to step(s) on the diagnostic table.
1. When the ignition is turned ON, the brake warning lamp should initially illuminate and then dim for ABS equipped vehicles. This is done as a bulb
check. On vehicles that are not equipped with ABS, the brake warning lamp should only illuminate when either the brake fluid reservoir is low or
the parking brake is applied.
7. The brake fluid level switch is a normally open switch. If the brake warning lamp is off after disconnecting the switch, the brake fluid level switch
is stuck closed.
9. If the brake warning lamp is still on after disconnecting the parking brake switch, there is a short to ground in the wire to the parking brake switch.
12. If the other checks have been properly performed and the brake warning lamp is off after disconnecting the electronic brake control module
(EBCM) J1 connector, the EBCM is faulty.
19. If the brake warning lamp does not operate while performing any of the functions, the fault should be in the ignition feed to the circuit.
24. This step determines if the problem is in the ignition feed to the circuit or in the instrument cluster.
30. The brake warning lamp should illuminate when jumpering the parking brake connector to ground.
32. If the brake warning lamp is on after jumpering the brake fluid level switch terminals, the switch is faulty.
