SSANGYONG KORANDO 1997 Service Repair Manual

1F1 -- 68 M162 ENGINE CONTROLS
D AEW OO M Y_2000
ACCELERATOR PEDAL MODULE
YAA1F620
The Acceleration Pedal Position (APP) sensor is mounted on the accelerator pedal assembly. The sensor is actually
two individual APP sensors and one housing. This sensor works with the Throttle Position (TP) sensor to provide input
to the Engine Control Module (ECM) regarding driver requested accelerator pedal and throttle angle at the throttle
body.
When the APP sensor is defected:
When the APP 1 or APP 2 sensor is defected condition, the engine is still running at idle condition but, the accelerator
pedal reaction is not response correctly and also, the engine rpmwill be reacted to 4,000 rpm slowly. If the APP 1
sensor is out of order, the APP 2 sensor will be conducted with signal as a default signal but, the throttle valve opening
is limited 60% and delayed opening speed.
When the TP sensor or servo motor is defected:
When the TP 1, 2 sensor or servo motor is defected condition, the throttle valvewill be closed to the spring capsule by
spring force, at this condition, the throttle valvewillopen 10°~20°and engine rpmwill be controlled by ECM will
opening (On/Off) time of injector. Theengine rpmwill be maintaining 900 rpm (at idle) to 1,800 according to theengine
load.

M162 ENGINE CONTROLS 1F1 -- 69
D AEW OO M Y_2000
KAB1F270
Failure
CodeDescriptionTrouble AreaMaintenance Hint
122
Acceleration pedal
position sensor signal
failureWhen malfunction of APP
Sensor
160
Acceleration pedal
position 1 sensor low
voltageAPP 1 sensor short circuit to
ground or open
161
Acceleration pedal
position sensor 1 high
voltageAPP 1 sensor short circuit to
power
DMonitoring the actual values through
162
Acceleration pedal
position sensor 2 low
voltageAPP 2 sensor short circuit to
ground or open
Monitoringtheactualvaluesthrough
scan tool
DInspection the ECM pin 31, 47, 32, 48,
59, 51 about short circuit or open with
badcontact
163
Acceleration pedal
position sensor 2 high
voltageAPP 2 sensor short circuit to
power
badcontact
DInspection the APP sensor
DInspection the ECM
164
Accelerator pedal
position sensor 1 not
plausible with
accelerator pedal
position sensor 2
When difference between
APP 1 sensor and APP 2
sensor
167
Both setpoint
Accelerator pedal
position sensor defectiveWhen defective of both APP
sensor
Circuit Description
The ECM supplies a 5 or 2.5 volt reference signal and a ground to the APP sensor 1 or 2. The ECM calculates on these
signal lines. The APP sensor output changes as the accelerator pedal is moved. The output of the APP 1 and APP 2
sensor are low, about 0.4 ~ 0.7 volts and 0.2 ~ 0.35 volts respectively at the closed throttle position. As pushing the
accelerator pedal, the output increases so that the output voltageswill be about 4.3 ~ 4.8 volts and 2.1 ~ 2.4 volts
individually when accelerating fully with the kick down, at Wide Open Throttle (WOT).

1F1 -- 70 M162 ENGINE CONTROLS
D AEW OO M Y_2000
Acceleration Pedal Position Sensor 1 Inspection
1. Turn the ignition switch to “ON” position.
2. Measure the signal voltage between the ECM pin No. 47 and No. 31 while operating the accelerator pedal as follow-
ing conditions.
DNot depress the pedal (closed throttle position)
DFully depress the pedal (full throttle with kick down)
Condition of Throttle Valve
Specified Value (V)
Closed Throttle Valve0.3 ~ 0.7
Fully Depressed Throttle Valve4.3 ~ 4.8
Notice:If measured value is not within the specified value, check the pedal valve sensor and the supply voltage to
APP 1 sensor.
Acceleration Pedal Position Sensor 2 Inspection
1. Turn the ignition switch to “ON” position.
2. Measure the signal voltage between the ECM pin No. 48 and No. 50 while operating the accelerator pedal as follow-
ing conditions.
DNot depress the pedal (closed throttle position)
DFully depress the pedal (full throttle with kick down)
Condition of Throttle Valve
Specified Value (V)
Closed Throttle Valve0.1 ~ 0.4
Fully Depressed Throttle Valve2.1 ~ 2.5
Notice:If measured value is not within the specified value, check the pedal valve sensor and the supply voltage to
APP sensor 2.

M162 ENGINE CONTROLS 1F1 -- 71
D AEW OO M Y_2000
CLUTCH SWITCH
KAB1F280
Failure
CodeDescriptionTrouble AreaMaintenance Hint
62Clutch switch defectiveWhen malfunction of clutch
switch
DInspection the Engine Control Module
(ECM) pin 43 about shout circuit or
open
DInspection the clutch switch
DInspection the ECM

1F1 -- 72 M162 ENGINE CONTROLS
D AEW OO M Y_2000
COOLING FAN
KAB1F290
Failure
CodeDescriptionTrouble AreaMaintenance Hint
44Cooling fan (HI) relay
short circuit to powerCooling fan short circuit to
powerDInspection the Engine Control Module
(ECM) pin 35 about short circuit or
openwithbadcontact
45
Cooling fan (HI) relay
short circuit to ground or
openCooling fan short circuit to
ground or open
openwithbadcontact
DInspection the power source
DInspection the cooling fan
DInspection the ECM
Circuit Description
Ignition voltage is supplied directly to the cooling fan relay coil. The ECM controls the relay by grounding the control
circuit. When the ECM is commanding a command ON, the voltage of the control circuit should be low (near 0 volt).
When the ECM is commanding the control circuit should be high (near battery voltage). If the fault detection circuit
senses a voltage other than what is expected, the fault line status will change causing the fault code to set.

M162 ENGINE CONTROLS 1F1 -- 73
D AEW OO M Y_2000
A/C COMPRESSOR RELAY
KAB1F290
Failure
CodeDescriptionTrouble AreaMaintenance Hint
228A/C compressor relay
short circuit to battery
WhenmalfunctionofA/C
DMonitoring the actual operation
through scan tool
DInspection the Engine Control Module
(ECM)pin44aboutshortcircuitor
229
A/c compressor relay
short circuit to ground or
open
When malfunction ofA/C
compressor control
(ECM)pin44aboutshortcircuitor
open with bad contact
DInspection the relay short circuit or
open
DInspection the ECM
Circuit Description
When the ECM detects that A/C has been requested, the ECMwill activated the A/C clutch relay. When the relay has
been activated, voltage should be present at both the A/C clutch relay and A/C switch circuit at ECM.

1F1 -- 74 M162 ENGINE CONTROLS
D AEW OO M Y_2000
CRUISE CONTROL SWITCH
KAB1F300
Failure
CodeDescriptionTrouble AreaMaintenance Hint
129
Cruise control “OFF”
due to message counter
failureCruise control system
Message counter fault
130Vehicle speed signal
failureWhen malfunction of
auto-- cruise systemDMonitoring the actual recognition
status and vehicle speed signal
throughscantool
131Vehicle speed signal
failure
autocruisesystem
Implausible condition of
vehicle speed signal.through scan tool
DInspection the Engine Control Module
(ECM)pin52,53,54,55,57about
132Cruise control lever
failureCruise control lever defective
(ECM)pin52,53,54,55,57about
short circuit or open with bad contact
DInspection the CAN and ABS
133Cruise control
acceleration failureCruise control system
Implausible condition of
acceleration signal
InspectiontheCANandABS
DInspection the cruise control lever
switch
DInspection the ECM
134Cruise control
deceleration failureCruise control system
Implausible condition of
deceleration signal
p
Circuit Description
Cruise control is an automatic speed control system that maintain a desired driving speed without using the accelerator
pedal. The vehicle speed must be greater than 40 km/h to engage cruise control.

M162 ENGINE CONTROLS 1F1 -- 75
D AEW OO M Y_2000
TRACTION CONTROLSYSTEM (TCS)
KAB1F310
Failure
CodeDescriptionTrouble AreaMaintenance Hint
150TCS input signal short
circuit to batteryTCS short circuit to powerDInspection the Engine Control Module
(ECM) pin 45 about short circuit or
openwithbadcontact
151TCS input signal short
circuit to ground or openTCS short circuit to ground or
open
openwithbadcontact
DInspection the TCS lamp of I/P cluster.
DInspection the ECM
Circuit Description
Battery voltage is supplied to the TCS warning lamp with the ignition in ON and START. The warning lamp can be
activated only by the Electrical Brake Control Module (EBCM) internally supplying ground to terminal 32. If the TCS
input circuit is open or short, this failure codewill be set.

1F1 -- 76 M162 ENGINE CONTROLS
D AEW OO M Y_2000
RESONANCE FLAP
KAB1F160
Failure
CodeDescriptionTrouble AreaMaintenance Hint
198Resonance flap short
circuit to batteryResonance flap short circuit
to power
DMonitoring the actual operational
status and vehicle speed signal
through scan tool
DInspection the Engine Control Module
(ECM) pin 97 about short circuit or
openwithbadcontact
199Resonance flap short
circuit to ground or openResonance flap short circuit
to ground or open
openwithbadcontact
DInspection the power source short
circuit or open to resonance flap
DInspection the resonance flap solenoid
and hardware
DInspection the ECM
Circuit Description
A pneumatically actuated resonance flap is located on the intake manifold, andwill beopened and closed by load,
which operates resonance flap according to engine and controlled by ECM and rpm.
Resonance flap is closed at idle/partial load (less than 3,800/rpm). The switch valvewill be adjusted by ECM and reso-
nance flapwill be closed. By increasing air flow passage through dividing intake air flow toward both air collection
housing. This leads to a significant increase in the torque in the lower speed range.
Resonance flap is open at full load (over 3,800/rpm). The switch valvewill not be adjusted by ECM and resonance flap
will beopen. The collected air in the air collection housingwill not be divided and intake air passage will be shorten.

M162 ENGINE CONTROLS 1F1 -- 77
D AEW OO M Y_2000
STOP LAMP SWITCH
KAB1F320
Failure
CodeDescriptionTrouble AreaMaintenance Hint
135Stop lamp switch failure
When malfunction of stop
lamp switch – implausible
condition of stop lamp signal
input
DMonitoring the actual operational
status and vehicle speed signal
through scan tool
DInspection the Engine Control Module
(ECM) pin 49 about short circuit or
open with bad contact
DInspection the contact condition of
stop lamp switch
DInspection the ECM
Circuit Description
The stop lamp switch is normally opened. When the ignition switch ON and brake ON, the battery voltage is supplied to
the ECM. A scan tool should display ON when brake pedal is depressed and should read OFF with brake pedal rele-
ased.