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6-20 ENGINE GENERAL INFORMATION AND DIAGNOSIS
DTC NO.
P1620
ECU code not registered
(No.84)
P1621
No ECU code transmitted from Immobilizer
(No.83)
Control Module
P1622
Fault in ECM
(No.82)
P1623
ECU code not matched
(No.81)
NOTE:
• For ( ) marked No. in DTC column, it is used for vehicle without immobilizer indication lamp.
• DTC No.12 appears when none of the other codes is identified.
• For vehicle with immobilizer indication lamp, star (✱) marked DTCs can be read with SUZUKI scan
tool ECM application.
FAIL-SAFE TABLE
When any of the following DTCs is detected, ECM enters fail-safe mode as long as malfunction continues to
exist but that mode is canceled when ECM detects normal condition after that.
DTC NO.
TROUBLE AREA
P0105
MAP SENSOR
(No.11)
P0110
IAT SENSOR
(No.18)
P0115
ECT SENSOR
(No.19)
P0120
TP SENSOR
(No.13)
P0130,
HEATED OXYGEN
P0134
SENOR-1
(No.14)
P0325
KNOCK SENSOR
(No.17)
P0335
CKP SENSOR
(No.23)
DETECTING ITEM
FAIL-SAFE OPERATION
ECM uses value determined by throt-
tle opening and engine speed.
ECM stops EGR, EVAP purge and
idle air control.
ECM controls actuators assuming
that intake air temperature is 20°C.
ECM controls actuators assuming
that engine coolant temperature is
80°C.
Radiator fan motor ON.
ECM controls actuators assuming
that throttle opening is 20°.
• Fix ignition timing.
• ECM changes injection control sys-
tem from sequential injection to
simultaneous one.
DETECTING CONDITION
(DTC will set when detecting :)
Refer to Section 8G
Hard starting/ rough or incorrect
idle/ excessive fuel consumption/
hesitation/ poor acceleration/
surge/ detonation or spark knock
Hard starting/ rough or incorrect
idle/ excessive fuel consumption/
hesitation poor acceleration/ deto-
nation or spark knock
Hard starting/ rough or incorrect
idle/ excessive fuel consumption/
hesitation poor acceleration/ deto-
nation or spark knock
Rough or incorrect idle/ excessive
fuel consumption/ hesitation/ poor
acceleration
–
Hard starting/rough or incorrect
idle/ excessive fuel consumption/
hesitation/ poor acceleration
–
Detonation/ spark knock
Hard staring/ engine stall
MIL
SYMPTOM
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