SSANGYONG KORANDO 1997 Service Repair Manual

SSANGYONG MY2002
4F-78 ABS AND TCS
Step
15
16
17
18Action
Go to Step 6
System OK
System OK
System OKGo to Step 16
-
Go to Step 18
- ≈ 0 Ω
-
-
-
1. Disconnect the hydraulic modulator.
2. Check the resistance between the motor connector
terminal 13 and ground G205.
Is the resistance equal to the specified value?
Repair the open circuit between the motor relay
connector terminal 13 and ground G205.
Is the repair complete?
1. Replace the hydraulic modulator.
2. Road test the vehicle.
Does DTC 24 clear?
Replace the ABS unit.
Is the repair complete?
DTC 24 - Pump Motor or Pump Motor Relay Fault (Cont’d)
Value(s) Yes No

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 OKGo 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
18Action
Go to Step 18
System OK
System OKGo 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

ABS AND TCS 4F-83
SSANGYONG MY2002
BLANK

SSANGYONG MY2002
4F-84 ABS AND TCS
DIAGNOSTIC TROUBLE CODE (DTC) 28
LOW VOLTAGE FAULT
KAA4F240
Circuit Description
Proper operation of the electronic brake control module
(EBCM) requires a certain minimum voltage. The EBCM
monitors the ignition feed circuit to determine if the
voltage falls below a minimum level.
Diagnosis
This test checks for battery output, proper grounding,
blown fuses, faulty ignition switch, and problems in the
circuitry.
Cause(s)
The battery is defective.
There is a defective ground connection.
A connector is damaged.
A wire is broken or shorted.
A fuse is blown.
The ignition switch is malfunctioning.Fail Action
ABS action is disabled during the period of low voltage,
and the ABS warning lamp is ON for the remainder of
the ignition cycle. If the failure is intermittent, the EBCM
will enable the system at the next ignition cycle and
set a history DTC 28.
Test Description
The number(s) below refer to step(s) on the diagnostic
table.
1. This step determines whether there is voltage at
the battery and at the high current source.
7. This step checks for voltage at the ignition 1
source.
15. This step begins the check for voltage at the EBCM
end of the ABS harness.
Diagnostic Aids
It is very important to perform a thorough inspection of
the wiring and the connectors. Failure to do so may re-
sult in misdiagnosis, causing part replacement with the
reappearance of the malfunction.
Step
1
2
3
Action
Go to Step 3
System OK
Go to Step 4Go to Step 2
-
Go to Step 7 11 - 14v
-
-
Check the voltage at the battery.
Is the voltage within the specified value?
Charge or replace the battery, as required.
Is the repair complete?
Check fuse EF11 in the engine fuse block.
Is the fuse blown?
DTC 28 - Low Voltage Fault
Value(s) Yes No

ABS AND TCS 4F-85
SSANGYONG MY2002
Step
4
5
6
7
8
9
10
11
12
13
DTC 28 - Low Voltage Fault (Cont’d)
Action
Go to Step 5
System OK
System OK
Go to Step 8
Go to Step 9
System OK
System OK
Go to Step 12
Go to Step 13
System OKGo to Step 6
-
-
Go to Step 11
Go to Step 10
-
-
Go to Step 15
Go to Step 14
- -
-
-
-
-
-
-
-
-
-
1. Replace fuse EF11.
2. Turn the ignition to ON.
Does the fuse blow again?
1. Turn the ignition to OFF.
2. Trace the BLK/WHT wires in the ABS wiring
harness from terminal 8 of C104 at the engine fuse
block to F19 in the I/P fuse block.
3. Repair any short circuit found along this path.
Is the repair complete?
1. Turn the ignition to OFF.
2. Install the scan tool.
3. Clear all DTCs.
4. Road test the vehicle.
Does DTC 28 reset?
Check fuse F19 in the I/P fuse block.
Is the fuse blown?
1. Replace fuse F19.
2. Turn the ignition to ON.
Does the fuse blow again?
1. Turn the ignition to OFF.
2. Trace the WHT/RED wires in the ABS Wiring
harness from fuse F19 to terminal 50 of the EBCM
connector.
3. Repair any short circuit found along this path.
Is the repair complete?
1. Turn the ignition to OFF.
2. Install the scan tool.
3. Clear all DTCs.
4. Rood test the vehicle.
Does DTC 28 reset?
Check fuse F29 in the I/P fuse block.
Is fuse F29 blown?
1. Replace fuse F29.
2. Turn the ignition to ON.
Does fuse F29 blow again?
1. Turn the ignition to OFF.
2. Trace the WHT/RED wire from fuse F19 to terminal
1 of the EBCM connector.
3. Repair any short circuit found along this path.
Is the repair complete?
Value(s) Yes No

SSANGYONG MY2002
4F-86 ABS AND TCS
Step
14
15
16
17
18
19
20
21
22
23
24
25
26
27
DTC 28 - Low Voltage Fault (Cont’d)
Action
System OK
Go to Step 17
System OK
Go to Step 19
System OK
Go to Step 21
System OK
Go to Step 22
Go to Step 23
System OK
System OK
Go to Step 26
System OK
System OK-
Go to Step 16
-
Go to Step 18
-
Go to Step 18
-
Go to Step 20
-
Go to Step 24
Go to Step 25
-
-
- -
11 - 14v
-
11 - 14v
-
11 - 14v
-
≈ 0 Ω
-
-
-
-
-
-
1. Turn the ignition to OFF.
2. Install the scan tool.
3. Clear all DTCs.
4. Road test the vehicle.
Does DTC 28 reset?
1. Disconnect the EBCM connector from the EBCM.
2. Turn the ignition to ON.
3. Check the voltage between ground and terminal 1,
and between ground and terminal 50.
Is the voltage within the specified value?
1. Turn the ignition to OFF.
2. Trace the WHT/RED wires between terminals 1
and 50 of the EBCM connector to fuse F19 and
F29 in the I/P fuse block.
3. Repair the open in this circuit.
Is the repair complete?
1. Turn the ignition ON.
2. Check the voltage at fuse F19.
Is the voltage within the specified value?
Repair the power supply circuit for fuse F19.
Is the repair complete?
1. Turn the ignition ON.
2. Check the voltage at fuse F29.
Is the voltage within the specified value?
Repair the power supply circuit for Fuse 29.
Is the repair complete?
1. Turn the ignition to OFF.
2. Check the resistance between ground and terminals
28 and 29 of the ABS harness EBCM connector.
Is the resistance equal to the specified value?
Examine terminals 1, 28, 29, and 50 of the EBCM
connector.
Is there a defective terminal?
Repair the defective terminal or replace the connector
or wiring harness, as required.
Is the repair complete?
Repair the defective ground connection.
Is the repair complete?
1. Install the scan tool.
2. Clear all DTCs.
3. Road test the vehicle.
Does DTC 28 set again?
Replace the ABS unit.
Is the repair complete?
1. Examine the wiring harness and connectors for
causes of intermittent problems.
2. Repair any intermittent problem found.
Is the repair complete?
Value(s) Yes No

ABS AND TCS 4F-87
SSANGYONG MY2002
BLANK