Daewoo NUBIRA User Manual

HYDRAULIC BRAKES 4A – 7
DAEWOO V–121 BL4
Brake Lamp Warning Circuit Diagnosis
Step Action Value(s) Yes No
1 Turn the ignition ON.
Is the brake warning lamp always on?
Go toStep 2 Go toStep 18
2 Check the ABS warning lamp.
Is the ABS warning lamp also on?
Go toStep 3 Go toStep 4
3 Use a scan tool to check for diagnostic trouble codes
(DTCs) and follow the procedures for any DTCs
found.
Is the lamp still on?
Go toStep 4 System OK
4 Release the parking brake fully.
Is the lamp off?
System OK Go toStep 5
5 Check the brake fluid level.
Is the fluid level OK?
Go toStep 7 Go toStep 6
6
1. Fill the brake fluid reservoir with clean DOT 3
equivalent hydraulic fluid.
2. Replace the cap on the fluid reservoir.
Is the lamp on?
Go toStep 7 System OK
7 Disconnect the harness connector from the brake
fluid level switch.
Is the lamp on?
Go toStep 9 Go toStep 8
8 Replace the brake fluid level switch.
Is the repair complete?
System OK
9
1. Connect the brake fluid level switch.
2. Disconnect the parking brake switch.
Is the lamp on?
Go toStep 11 Go toStep 10
10 Replace the parking brake switch.
Is the repair complete?
System OK
11 Connect the parking brake switch.
Is the vehicle equipped with ABS?
Go toStep 12 Go toStep 14
12
1. Turn the ignition OFF.
2. Disconnect the electronic brake control module
(EBCM) connector.
3. Turn the ignition ON.
Is the lamp on?
Go toStep 14 Go toStep 13
13 Replace the electronic brake control module
(EBCM).
Is the repair complete?
System OK
14
1. Turn the ignition OFF.
2. Connect the EBCM connector.
3. Check for a short to ground in the wiring be-
tween the instrument cluster terminal A2 and
the brake fluid level switch.
Is the problem found?
Go toStep 17 Go toStep 15
15 Check for a short to ground in the wiring between the
instrument cluster terminal A2 and the parking brake
switch.
Is the problem found?
Go toStep 17 Go toStep 16

Daewoo NUBIRA Specifications

General

Brand	Daewoo
Model	NUBIRA
Category	Automobile
Language	English