Suzuki Engine 2002 GRAND VITARA SQ625, Руководство по обслуживанию

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6-1-106 ENGINE GENERAL INFORMATION AND DIAGNOSIS (H25 ENGINE)
DTC CONFIRMATION PROCEDURE
1) With ignition switch OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC by using scan tool if any.
3) Crank engine for 8 sec.
4) Check DTC by using scan tool.
DTC TROUBLESHOOTING
NOTE:
Check to make sure that following conditions are satisfied when using this DTC CONFIRMATION PRO-
CEDURE.
• Intake air temperature : between –14°C and 70°C (6.8°F and 158°F)
• Atmospheric pressure : higher than 560 mmHg (Altitude : lower than 2790 m (9150 ft))
• Following DTC is not detected : P0335
Step Action Yes No
1 Was “Engine Diag. Flow Table” performed? Go to Step 2. Go to “Engine Diag. Flow
Table”.
2 Is engine cranked? Go to Step 3. Go to Section 6G.
3 Engine Start Signal check :
1) Check engine start signal circuit referring to
“DTC P1500” in this section.
Is the result satisfactory?
Go to Step 4. Repair or replace.
4 CMP Sensor Power Supply Voltage check :
1) With ignition switch OFF, disconnect CMP
sensor coupler (1).
2) With ignition switch ON, check voltage
between “BLU/BLK” wire terminal and
“GRY/YEL” wire terminal of CMP sensor
coupler.
Is the voltage 10 – 14 V?
Go to Step 5. Faulty “BLU/BLK” wire
and/or “GRY/YEL” wire.
5 CMP Sensor (REF) Signal check :
1) With ignition switch OFF, connect CMP sen-
sor coupler (1).
2) Disconnect couplers from ignition coil
assembly and fuel injectors.
3) With ignition switch ON and crankshaft
turned slowly, check voltage between C51-
3-10 and C51-3-21.
Does voltmeter indicator deflect between 0 – 1
V and 4 – 6 V 6 times while crankshaft turned
two revolutions?
Go to Step 6. Faulty “YEL/BLU” wire or
CMP sensor.
If OK, substitute a known-
good ECM (PCM) and
recheck.
6 CMP Sensor (POS) Signal check :
1) With ignition switch ON and crankshaft
turned slowly, check voltage between C51-
3-9 and C51-3-21.
Does voltmeter indicator deflect between 0 – 1
V and 4 – 6 V?
Poor C51-3-9 and/or C51-
3-10 terminal of ECM
(PCM) coupler connec-
tion.
If OK, substitute a known-
good ECM (PCM) and
recheck. Faulty “YEL/GRN” wire or
CMP sensor.
If OK, substitute a known-
good ECM (PCM) and
recheck.