SsangYong Korando II (1996-2006 year). Manual — part 113
1F2 -- 32 M161 ENGINE CONTROLS
DAEWOO MY_2000
KNOCK SENSOR (KS)
YAA1F320
The Knock Sensor (KS) detects abnormal knocking in the engine. The two KS are mounted in the engine block near
the cylinders. The sensors produce an output voltage which increases with the severity of the knock. This signal is sent
to the Engine Control Module (ECM) via a shielded cable. The ECM then adjusts the ignition timing to reduce the spark
knock.
M161 ENGINE CONTROLS 1F2 -- 33
DAEWOO MY_2000
KAB1F440
Failure
Code
Description
Trouble Area
Maintenance Hint
56
No. 1 knock sensor
signal failure
When recognition in more
than control gain threshold at
normal operational condition
of other system during over
75 and 3,000 rpm running
area (cylinder 1, 2, 3, 4)
D
Inspection the ECM pin 118, 117 about
short circuit or open with bad contact
D
Inspection the KS 1 malfunction
D
Inspection the ECM
Circuit Description
The KS system is used to detect engine detonation, allowing the ECM to retard the ignition control spark timing based
on the KS signal being received. The KS signal’s amplitude and frequency depend upon the amount of knock being
experienced. The ECM monitors the KS signal and can diagnose the KS sensor and circuitry.
Knock Sensor Resistance Inspection
1. Disconnect the coupling from ECM while the ignition switch is in “OFF” position.
2. Measure the resistance between the coupling terminal pin No. 118 and No. 117 using a multimeter.
Specified Value
> 10 MΩ
Notice: Replace the KS if the measured values is out of the specified values. Check the connector and wire connec-
tion between ECM and the KS if the measured values are normal.
1F2 -- 34 M161 ENGINE CONTROLS
DAEWOO MY_2000
SPARK PLUG
YAA1F990
M161 ENGINE CONTROLS 1F2 -- 35
DAEWOO MY_2000
KAB1F450
Failure
Code
Description
Trouble Area
Maintenance Hint
68
Random / Multiple
Misfire
When detection misfire of
multiple cylinder for source of
over the emission threshold or
catalyst damage
D
Inspection the ignition system
D
Inspection the injection system
D
Inspection the fuel pressure
D
Inspection the compression pressure
D
Inspection the valve timing or
clearance
D
Inspection the air flow sensor
D
Inspection the crankshaft position
sensor and air gap
D
Inspection the engine wiring system
D
Inspection the Engine Control Module
(ECM)
Circuit Description
The ECM monitors the crankshaft and camshaft positions to detect if the engine is misfiring. The ECM looks for a quick
drop in crankshaft speed. Misfire multiple cylinder is monitored by engine roughness measuring. The actual roughness
value is compared with the actual (emission and catalyst damage) threshold.
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