SsangYong Korando II (1996-2006 year). Manual - part 266

ABS AND TCS 4F-79

SSANGYONG MY2002

BLANK

SSANGYONG MY2002

4F-80  ABS AND TCS

DIAGNOSTIC TROUBLE CODE (DTC) 27

STOPLAMP SWITCH FAULT

KAA4F230

Circuit Description

When the brake pedal is pressed, the contacts on the
brake light switch close to illuminate the brake lights.
Battery voltage is also applied to terminal 48 of the
elec-tronic brake control module (EBCM), which signals
the ABS controller that the brakes are applied and ABS
may be needed. Without this, signals from a wheel
speed sensor that may indicate the need for ABS
intervention are questionable. When the brake pedal is
not pressed, the EBCM terminal 48 is grounded through
the stoplamps.

Diagnosis

This procedure will check whether there is no output or
constant output from the stoplamp switch and will deter-
mine the cause as a faulty switch or a problem in the
circuitry.

Cause(s)

•

The ground connection or the positive connection
at the EBCM has failed.

•

There is an open, short to ground, or short to positive
in the vehicle wiring.

•

The stoplamp switch has failed.

Fail Action

The system records a DTC 27. ABS operation is not
dis-abled.

Test Description

The number(s) below refer to step(s) on the diagnostic
table.

12. This step begins the process of troubleshooting

stoplamps that are always on.

Diagnostic Aids

Inspect the wiring and the connectors carefully and
thoroughly. Failure to do so could result in misdiagnosis,
causing part replacement with the reappearance of the
malfunction.

ABS AND TCS 4F-81

SSANGYONG MY2002

Step

1

2

 3

4

5

6

7

8

9

10

11

12

13

14

15

DTC 27 - Stoplamp Switch Fault

Action

Go to Step 12

Go to Step 3

System OK

Go to Step 6

System OK

Go to Step 7

System OK

Go to Step 10

System OK

Go to Step 12

System OK

Go to Step 13

System OK

Go to Step 16

System OK

Go to Step 2

Go to Step 4

-

Go to Step 5

-

Go to Step 8

-

Go to Step 9

-

Go to Step 11

-

Go to Step 14

-

Go to Step 15

-

-

-

-

11 - 14v

-

-

-

11 - 14v

-

11 - 14v

-

-

-

11 - 14v

-

Observe the stoplamps when the brakes are applied.
Do the stoplamps turn on?
Check fuse EF11.
Is fuse EF11 blown?
1. Check for a short circuit and repair it, if necessary.
2. Replace fuse EF11
Is the repair complete?
Check the voltage at fuse EF11.
Is the voltage equal to the specified value?
Repair the power supply circuit for fuse EF11.
Is the repair complete?
Check the voltage at fuse F18.
Is fuse F18 blown?
1. Check for a short circuit between terminal 8 of

connector C104 and fuse F18 in the I/P fuse block
and repair it, if necessary.

2. Replace fuse F18.
Is the repair complete?
Check the voltage at terminal B2 of the stoplamps
switch.
Is the voltage equal to the specified value?
Repair the open circuit between fuse F18 and termi-
nal B2 of the stoplamp switch.
Is the repair complete?
With the brakes applied, check the voltage at
terminal B4 of the stoplamp switch.
Is the voltage equal to the specified value?
Replace the stoplamp switch.
Is the repair complete?
1. Disconnect the electronic brake control module

(EBCM) connector.

2. Visually inspect the EBCM and its connector for

damaged pins or terminals.

Are there any damaged pins or terminals?
Repair the damaged pins or terminals.
Is the repair complete?
1. With the EBCM connector disconnected, applied

the brake.

2. Check the voltage at terminal 48 of the EBCM.
Is the voltage equal to the specified value?
Repair the open circuit between the B4 of the stoplamp
switch and terminal 48 of the EBCM connector.
Is the repair complete?

Value(s)

Yes

No

SSANGYONG MY2002

4F-82  ABS AND TCS

Step

16

17

18

Action

Go to Step 18

System OK

System OK

Go to Step 17

-

-

≈

 0 

Ω

-

-

With the EBCM disconnected, use an ohmmeter to
measure the resistance between ground and terminal
28 of the EBCM connector.
Is the resistance equal to the specified value?
Repair the open circuit between ground and terminal
48 of the EBCM.
Is the repair complete?
Replace the ABS unit.
Is the repair complete?

DTC 27 - Stoplamp Switch Fault (Cont’d)

Value(s)

Yes

No