1997 SSANGYONG KORANDO Pedal

M161 ENGINE CONTROLS 1F2 -- 93
D AEW OO M Y_2000
Failure
CodeDescriptionTrouble AreaMaintenance Hint
239
Unusual accelerator
pedal position sensor
comparison fault
(CPU 2)
240
Throttle potentiometer
comparison fault
(CPU 2)
241Unusual CPU
communication (CPU 2)
242Unusual CPU
configuration (CPU 2)
243A/D converter failure
(CPU 2)
244
Accelerator pedal
position sensor setpoint
fault between CPU 1
and CPU 2
System internal failureDInspection the Engine Control Module
(ECM)
245
Position controller
setpoint fault between
CPU 1 and CPU 2
y(ECM)
246
MSR setpoint fault
between CPU 1 and
CPU 2
247
Idle control setpoint fault
between CPU 1 and
CPU 2
248A/D converter overflow
(CPU 2)
249ROM fault (CPU 2)
250RAM fault (CPU 2)
251Cycle monitor fault
(CPU 2)

M161 ENGINE CONTROLS 1F2 -- 103
D AEW OO M Y_2000
KAA1F410
PEDAL POSITION SENSOR
Removal and installation Procedure
1. Disconnect the negative battery cable.
2. Disconnect the pedal position sensor connector.
3. Unscrew the bolts and nut.
Installation Notice
Tightening Torque
6NSm (53 lb-in)
4. Remove the pedal and sensor assembly.
5. Installation should follow the removal procedure in
the reverse order.
YAA1F820
OXYGEN SENSOR
Removal and Installation Procedure
1. Disconnect the negative battery cable.
Notice:The oxygen sensor uses a permanently at-
tached pigtail and connector. This pigtail should not be
removed from the oxygen sensor. Damage or removal
of the pigtail or the connector could affect proper opera-
tion of the oxygen sensor. Do not drop the oxygen sen-
sor.
2. Disconnect the electrical connector.
3. Carefully remove the oxygen sensor from the exhaust
pipe.
Installation Notice
Tightening Torque
55 NSm (41 Ib-ft)
Important:A special anti-seize compound is used on
the oxygen sensor threads. This compound consists of
a liquid graphite and glass beads. The graphitewill burn
away, but the glass beadswill remain, making the sen-
sor easier to remove. New or serviced sensors will al-
ready have the compound applied to the threads. If a
sensor is removed from any engine and is to be rein-
stalled, the threads must have an anti-seize compound
applied before reinstallation.
4. Coat the threads of the oxygen sensor with an anti-
seize compound, if needed.
5. Installation should follow the removal procedure in
the reverse order.

SECTION 4A
HYDRAULIC BRAKES
CAUTION: Disconnect the negative battery cable before removing or installing any electrical unit or when
a tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this
cable will help prevent personal injury and damage to the vehicle. The ignition must also be in LOCK
unless otherwise noted.
TABLE OF CONTENTS
Description and Operation...................................4A-2
General Description.............................................4A-2
Diagnostic Information and Procedures..............4A-3
Brake System Testing ..........................................4A-3
Brake Hose Inspection.........................................4A-3
Brake Warning Lamp Circuit Description..............4A-4
Brake Warning Lamp Diagnosis...........................4A-5
LCRV (Load Conscious Reducing Valve)..............4A-8
Repair Instructions..............................................4A-10On-Vehicle Service...............................................4A-10
Manual Bleeding The Brakes.............................4A-10
Front Brake Hose...............................................4A-13
Rear Brake Hose...............................................4A-13
Stoplamp Switch................................................4A-14
Brake Pedal.......................................................4A-14
Specifications.....................................................4A-15
General Specification .........................................4A-15
Fastener Tightening Specifications.....................4A-16

HYDRAULIC BRAKES 4A-3
SSANGYONG MY2002
DIAGNOSTIC INFORMATION AND PROCEDURES
BRAKE SYSTEM TESTING
Brakes should be tested on a dry, clean, reasonably
smooth and level roadway. A true test of brake perfor-
mance cannot be made if the roadway is wet, greasy,
or covered with loose dirt which can cause tires not to
grip the road unequally. Testing also will be inaccurate
on a crowned roadway because the wheels tend to
bounce.
Test the brakes at different vehicle speeds with both
light-and heavy-pedal pressure; however, avoid locking
the brakes and sliding the tires. Locked brakes and
slid-ing tires do not indicate brake efficiency since
heavily braked but turning wheels will stop the vehicle
in less distance than locked brakes. More tire-to-road
friction is present with a heavily braked, turning tire
than with a sliding tire.
Because of the high deceleration capability, a firmer
pedal may be felt at higher deceleration levels.
There are three major external conditions that affect
brake performance:
•Tires having unequal contact and grip of the road
will cause unequal braking. Tires must be equally
inflated, and the tread pattern of the right and the
left tires must be approximately equal.
Unequal loading of the vehicle can affect the brake
performance since the most heavily loaded wheels
require more braking power, and thus more braking
effort, than the others.
Misalignment of the wheels, particularly conditions
of excessive camber and caster, will cause the
brakes to pull to one side.
To check for brake fluid leaks, hold constant foot pres-
sure on the pedal with the engine running at idle and
the shift lever in NEUTRAL. If the pedal gradually falls
away with the constant pressure, the hydraulic system
may be leaking. Perform a visual check to confirm any
suspected leaks.
Check the master cylinder fluid level. While a slight
drop in the reservoir level results from normal lining
wear, an abnormally low level indicates a leak in the
system. The hydraulic system may be leaking either
internally or externally. Refer to the procedure below
to check the master cylinder. The system may appear
to pass this test while still having a slight leak. If the
fluid level is normal, check the vacuum booster pushrod
length. If an incorrect pushrod length is found, adjust
or replace the rod.Check the master cylinder using the following proce
dure:
Check for a cracked master cylinder casting or a
brake fluid leak around the master cylinder. Leaks
are indicated only if there is at least one drop of
fluid. A damp condition is not abnormal.
Check for a binding pedal linkage and for an
incorrect pushrod length. If both of these parts are
in satisfactory condition, disassemble the master
cylinder and check for an elongated or swollen
primary cylinder or piston seals. If swollen seals
are found, substandard or contaminated brake fluid
should be suspected. If contaminated brake fluid
is found, all the components should be
disassembled and cleaned, and all the rubber
components should be replaced. All of the pipes
must also be flushed.
Improper brake fluid, or mineral oil or water in the fluid,
may cause the brake fluid to boil or cause deterioration
of the rubber components. If the primary piston cups in
the master cylinder are swollen, the rubber parts have
deteriorated.
If deterioration of the rubber is evident, disassemble
all the hydraulic parts and wash the parts with alcohol.
Dry these parts with compressed air before reassembly
to keep the alcohol out of the system. Replace all the
rubber parts in the system, including the hoses. When
working on the brake mechanisms, check for fluid on
the linings. If excessive fluid is found, replace the
linings.
If the master cylinder piston seals are in satisfactory
condition, check for leaks or excessive heat conditions.
If these conditions are not found, drain the fluid, flush
the master cylinder with brake fluid, refill the master
cylinder, and bleed the system.
BRAKE HOSE INSPECTION
The hydraulic brake hoses should be inspected at least
twice a year. The brake hose assembly should be
checked for road hazard damage, cracks, chafing of
the outer cover, and for leaks or blisters. Inspect the
hoses for proper routing and mounting. A brake hose
that rubs on a suspension component will wear and
eventually fail. A light and a mirror may be needed for
an adequate inspection. If any of the above conditions
are observed on the brake hose, adjust or replace the
hose as necessary.

HYDRAULIC BRAKES 4A-11
SSANGYONG MY2002
KAA4A040
KAA4A020
KAA4A040
KAA4A050
3. Disconnect the brake line at the front of the master
cylinder.
4. Allow the brake fluid to fill the master cylinder until
it begins to flow from the port.
5. Reconnect the brake line at the front of the master
cylinder.
6. Slowly push and hold the brake pedal.
7. While the brake pedal is pushed down, loosen the
brake fitting at the front of the master cylinder to
purge the air from the cylinder.
8. Slightly tighten the brake fitting. Then release the
brake pedal slowly. Wait 15 seconds before continu-
ing with the next step.
9. Repeat Steps 6-8 until all of the air is removed
from the master cylinder bore.
10. Tighten the brake line fitting.
Installation Notice
11. After the air has been bled at the front connection,
bleed the master cylinder at the rear connection
using the same sequence as with the top
connection.
Installation Notice
Tightening Torque 22 Nm (16 lb-ft)
Tightening Torque 17 Nm (13 lb-ft)

SSAMGYONG MY2002
4A-12 HYDRAULIC BRAKES
13. Slowly push and hold the brake pedal. Avoid rapid
pumping of the brake pedal.
14. While the brake pedal is pushed down, loosen the
bleeder valve to purge the air from the caliper.
15. After the air bubbles have escaped into the
container of brake fluid, slightly tighten the rear
bleeder valve.
16. Slowly release the brake pedal. Wait 15 seconds
before proceeding with the next step.
Notice: Keep brake fluid away from painted
surfaces because brake fluid will damage the paint
finish.
17. Repeat Steps 13 - 16 until all of the air is removed.
You will know all of the air is removed when no
bubbles appear in the container when the bleeder
valve is loosened. Keep the master cylinder reser
voir at least one-half full during the bleeding
operation.
18. Tighten the front bleeder valve.
Installation Notice 12. Attach a transparent tube over the rear bleeder
valve at the right rear caliper. Allow the tube to
hang submerged in the brake fluid in a transparent
container. (After the right rear caliper is bled in
the following steps, use this procedure at the left
front, the left rear and the right front bleeder valves.)
19. Bleed the remaining calipers in the following order
: left rear, right front, and left front. Use the
procedure in Steps 12 - 17.
20. After all calipers have been bled, check the brake
pedal for sponginess. If the brake pedal is not firm,
repeat the entire bleeding procedure to correct this
condition.
Tightening Torque 10 Nm (89 lb-ft)
KAA4A060
KAA4A070

SSAMGYONG MY2002
4A-14 HYDRAULIC BRAKES
KAA4A120
KAA4A130
KAA4A140
STOPLAMP SWITCH
Removal and Installation Procedure
1. Remove the stoplamp switch connector.
2. Remove the stoplamp switch.
3. Installation should follow the removal procedure
in the reverse order.
BRAKE PEDAL
Removal and Installation Procedure
1. Remove the stoplamp switch connector.
2. Remove the clevis pin and disconnect the brake
booster pushrod.
Installation Notice:
Install in the upper hole.
Install the snap pin fully in the hole of clevis
pin.
Apply the grease around the hold of clevis pin.
3. Remove the brake pedal mounting nut and remove
the brake pedal assembly.
Installation Notice
Tightening Torque 13 Nm (10 lb-ft)
4. Installation should follow the removal procedure
in the reverse order.
KAA4A070
3. Remove the rear bleeder valve from the caliper as
sembly.
Installation Notice
Tightening Torque 10 Nm (89 lb-ft)
Bleed the brake system. Refer to “Manual
Bleeding the Brakes” in this section.
Check the brake system for leaks.
4. Installation should follow the removal procedure in
the reverse order.

SSAMGYONG MY2002
4A-16 HYDRAULIC BRAKES
10
13
-
22
- Brake Pedal Mounting Nut
Brake Lind Fitting
Front Bleeder Valve
Front Brake Hose-to-Front Caliper Assembly Bolt
Rear Bleeder ValveNm Application
Lb-In
FASTENER TIGHTENING SPECIFICATIONS
Lb-Ft
13
17
10
30
10-
-
89
-
89