SSANGYONG KORANDO 1997 Service Repair Manual

M161 ENGINE CONTROLS 1F2 -- 43
D AEW OO M Y_2000
KAB1F210
Failure
CodeDescriptionTrouble AreaMaintenance Hint
34Fuel pump relay short
circuit to batteryWhen short circuit to power
sourceDInspection the Engine Control Module
(ECM) pin 33 about short circuit or
openwithbadcontact
35Fuel pump relay short
circuit to ground or openWhen short circuit to ground
or open
openwithbadcontact
DInspection the fuel pump relay
DInspection the ECM
Circuit Description
When the ignition switch is turned ON, the ECM will activate the pump relay and run the in -- tank fuel pump. The fuel
pump willoperate as long as the engine is cranking or running and the ECM is receiving ignition reference pulses.
If there are no reference pulses, the ECM will shut off the fuel pump within 2 seconds after the ignition switch is turned
ON, engine stopped or engine stalled.
Fuel Pump Relay Inspection
Measure the voltage between the ECM terminal No. 33 and Ground.
Ignition Switch : ON
0v(for1~2sec.)
Cranking0v

1F2 -- 44 M161 ENGINE CONTROLS
D AEW OO M Y_2000
Measure the Fuel Delivery from the Fuel Pump
1. Disconnect the return pipe from fuel distributor and insert the appropriate hose into it.
2. Place the hose end into the beaker with the minimum capacity of 1 Liter
3. Turn the ignition switch to “ON” position.
4. Connect the terminal No. 33 and No. 5 of ECM with a service wire.
5. Measure the fuel delivery from the fuel pump
Specified Value
1 Liter/max. 35 sec.
Notice:Check the fuel filter and fuel line when the fuel delivery is not within specified value.
Measure the Current Consumption of Fuel Pump
1. Remove the fuel pump relay from fuse and relay box in trunk, and turn the ignition switch to “ON” position.
2. Using a multimeter, measure the current consumption by connecting the terminal No. 30 and No. 87 of the fuel
pump relay connector.
Specified Value
5~9A
Notice:Replace the fuel pump relay if the measured value is over 9 A.

M161 ENGINE CONTROLS 1F2 -- 45
D AEW OO M Y_2000
BLANK

1F2 -- 46 M161 ENGINE CONTROLS
D AEW OO M Y_2000
FUEL INJECTOR
YAA1F0C0
The Multipoint Fuel Injection (MFI) assembly is a solenoid -- operated device controlled by the Engine Control Module
(ECM) that meters pressurized fuel to an each individual cylinder. The injector sprays the fuel, in precise quantities at a
point in time determined by the ECM, directly toward the cylinder intake valve. ECM energizes the fuel injector solenoid
to lift the needle valve and to flow the fuel through the orifice. This injector ’s discharge orifice is calibrated to meet the
effective fuel atomization necessary for both ensuring the maximum homogeneity in the air -- fuel mixture and holding
the condensation along the walls of the intake tract to a minimum.
Fuel enters the top feed injector from above and flows through its vertical axis. The lower end extends into the intake
valve. Fuel from the tip is directed at the intake valve, causing it to become further atomized and vaporized before
entering the combustion chamber.
A fuel injector which is stuck partially open would cause a loss of fuel pressure after the engine is shut down. Also, an
extended crank time would be noticed on some engines. Dieseling could also occur because some fuel could be deliv-
ered to the engine after the ignition is turned off.

M161 ENGINE CONTROLS 1F2 -- 47
D AEW OO M Y_2000
KAB1F460
Failure
CodeDescriptionTrouble AreaMaintenance Hint
72No. 1 injector short
circuit to battery
When malfunction of injector
circuit
Injector #1 short circuit to
powerDInspection the power to injector #1 or
bad contact
DInspection the injector
DInspection the ECM
73No. 1 injector short
circuit to ground or open
When malfunction of injector
circuit
Injector #1 short circuit to
ground or openDInspection the ECM pin 63 about short
circuit or open with bad contact
DInspection the injector
DInspection the ECM
74No. 2 injector short
circuit to battery
When malfunction of injector
circuit
Injector #2 short circuit to
powerDInspection the power to injector #2 or
bad contact
DInspection the injector
DInspection the ECM
75No. 2 injector short
circuit to ground or open
When malfunction of injector
circuit
Injector #2 short circuit to
ground or openDInspection the ECM pin 64 about short
circuit or open with bad contact
DInspection the injector
DInspection the ECM
76No. 3 injector short
circuit to battery
When malfunction of injector
circuit
Injector #3 short circuit to
powerDInspection the power to injector #3 or
bad contact
DInspection the injector
DInspection the ECM

1F2 -- 48 M161 ENGINE CONTROLS
D AEW OO M Y_2000
Failure
CodeDescriptionTrouble AreaMaintenance Hint
77No. 3 injector short
circuit to ground or open
When malfunction of injector
circuit
Injector #3 short circuit to
ground or openDInspection the ECM pin 65 about short
circuit or open with bad contact
DInspection the injector
DInspection the ECM
78No. 4 injector short
circuit to battery
When malfunction of injector
circuit
Injector #4 short circuit to
powerDInspection the power to injector #4 or
bad contact
DInspection the injector
DInspection the ECM
79No. 4 injector short
circuit to ground or open
When malfunction of injector
circuit
Injector #4 short circuit to
ground or openDInspection the ECM pin 66 about short
circuit or open with bad contact
DInspection the injector
DInspection the ECM
YAA1F420YAA1F430
Injector Spray Pattern Check
1. Turn the ignition switch OFF.
2. Remove the fuel injector connectors.
3. Remove the fuel distributor and injector with a unit. At this time, do not remove the supply and return line.
Notice:Prepare the beaker for taking the fuel.
4. Connect the shop made cable to the injector with a firing order.
5. Connect the other end of shop made cable to the positive battery cable and negative battery cable.
6. Turn the ignition switch ON.
7. Check the injector for normal spray pattern as shown in the figure. Check injector for leaks or later drop
Injector Resistance Inspection
1. Turn the ignition switch OFF.
2. Remove the fuel injector connectors.
3. Measure the fuel injector coil resistance using a multimeter.
Specified Value
14 ~ 17Ω
Notice:Replace the fuel injector if the measured value is out of the specified values. Check the connector and wire
connection between the ECM and the injector if the measured values are normal.

M161 ENGINE CONTROLS 1F2 -- 49
D AEW OO M Y_2000
Injector Pulse Width Inspection
1. Turn the ignition switch OFF.
2. Install the scan tool.
3. Turn the ignition switch ON.
4. Monitor the “INJECTION TIME” with a scan tool.
Cranking
8.0 ms
Engine Idle3~5ms
Wide Open Throttle (WOT)14 ms

1F2 -- 50 M161 ENGINE CONTROLS
D AEW OO M Y_2000
PURGE CONTROL VALVE
YAA1F440
The fuel vaporization control system is installed to inhibit the fuel vaporized gas from discharging into the atmosphere.
The fuel vaporized gas that is accumulated in the canister abstracts through the purge control valve purification during
the engine combustion (except the decreasing mode) and coolant temperature of over 80°C. For this reason, the En-
gine Control Module (ECM) transacts the engine speed, air inflow quantity, coolant temperature, and intake tempera-
ture.
The purge control valve is activated by the ECM frequency according with the engine rotating speed to adjust the
purification rate. The purification rate is determined by the continuous valve opening interval.
The purge control valve is activated by the ECM for the following conditions:
DCoolant temperature of over 80°C
DEngine speed of over 1,000 rpm
D2 minutes after starting
DWhen the fuel cut -- off mode is not activated

M161 ENGINE CONTROLS 1F2 -- 51
D AEW OO M Y_2000
KAB1F230
Failure
CodeDescriptionTrouble AreaMaintenance Hint
40Purge control valve
short circuit to batteryWhen short circuit to power
sourceDInspection the ECM pin 34 about short
circuitoropenwithbadcontact
41
Purge control valve
short circuit to ground or
openWhen short circuit to ground or
open
circuitor open withbadcontact
DInspection the source power of valve
DInspection the purge control solenoid
vale
54Purge control circuit
malfunctionWhen malfunction of purge
control : not workvale
DInspection the ECM
Test
YAA1F460
1. Maintain the normal temperature and idling state by
operating the engine.
2. Connect the ECM terminal No. 11 and No. 34 and
check for normal operation through the output waves
using oscilloscope.Notice:Test during purge control valve operation after
the minimum of 1 minute after the engine turned on.
3. Connect the ECM terminal No. 34 and No.10 and
check for current consumption during the ignition
switch ON.
Specified Value
0.3 ~ 0.5 A
4. Remove the line to canister and measure the pres-
sure with the vacuum pressure gauge.
Specified Value
> 500 mbar
(after approx. 1 min.)
purge control valve operates
at this time
Notice:Test while at normal temperature and at idling
state by operating the engine.

1F2 -- 52 M161 ENGINE CONTROLS
D AEW OO M Y_2000
FUEL RAIL
YAA1F0E0