Suzuki Engine 2002 GRAND VITARA SQ625, Service Manual

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ENGINE GENERAL INFORMATION AND DIAGNOSIS (G16/J20 ENGINES) 6-89
DTC DETECTING CONDITION AND TROUBLE AREA
DTC CONFIRMATION PROCEDURE
1) Connect scan tool to DLC with ignition switch OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool and run
engine at idle speed for 10 sec.
3) Check DTC and pending DTC by using scan tool.
TROUBLESHOOTING (DTC P0335)
DTC DETECTING CONDITION TROUBLE AREA
CKP sensor signal is not input while 20 pulses of CMP sen-
sor signal are input after engine start. • CKP sensor circuit
• CKP sensor
• ECM (PCM)
NOTE:
Check to make sure that the following conditions are satisfied when using this “DTC Confirmation
Procedure”.
• Intake air temp. : –8°C, 18°F or higher
• Engine coolant temp. : –8 – 110°C (18 – 230°F)
• Altitude (barometric pressure) : 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)
Step Action Yes No
1 Was “Engine Diag. Flow Table” performed? Go to Step 2. Go to “Engine Diag.
Flow Table”.
2 CKP Sensor and Its Circuit Resistance Check :
1) With ignition switch OFF, disconnect ECM
(PCM) coupler (C51-2).
2) Check for proper connection to ECM (PCM) at
C51-2-19 and C51-2-20 terminals.
3) If OK, check resistance of followings.
CKP resistance between C51-2-19 and
C51-2-20 terminals of ECM (PCM)
360 – 460
Ω
at 20°C, 68°F (G16)
484 – 656
Ω
at 20°C, 68°F (J20)
CKP resistance between each terminal of ECM
(PCM) and ground : 1M
Ω
or more
Is check result satisfactory?
Go to Step 4. Go to Step 3.
3 CKP Sensor Resistance Check :
1) With ignition switch OFF, disconnect CKP sen-
sor coupler.
2) Check resistance between terminals of CKP
sensor coupler for G16 engine, between
“WHT” wire terminal (1) and “RED” wire termi-
nal (2) for J20 engine.
3) Check resistance between each terminal and
ground. (See Fig.)
Were measured resistance values as specified in
Step 2?
Faulty “WHT/BLU” wire or
“ORN/BLU” wire. Faulty CKP sensor.