Suzuki Engine 2002 GRAND VITARA SQ625, Руководство по обслуживанию

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6-1-70 ENGINE GENERAL INFORMATION AND DIAGNOSIS (H25 ENGINE)
DTC TROUBLESHOOTING
Fig. for Step 5
Step Action Yes No
1 Was “Engine Diag. Flow Table” performed? Go to Step 2. Go to “Engine Diag. Flow
Table”.
2 TP Sensor Signal check :
1) Remove ECM (PCM) cover.
2) Start engine and warm up for normal oper-
ating temperature then stop engine.
3) With ignition switch ON leaving engine stop,
check voltage between C51-3-12 and C51-
3-20.
TP sensor output signal circuit resistance
Fully close : 0.35 – 0.65 V
Fully open : 3.5 – 4.5 V
Is check result as specified?
Go to Step 3. Go to Step 4.
3 Air Intake System inspection :
1) Check air intake system for clog and air
inhabit.
Is air intake system in good condition?
Substitute a known-good
ECM (PCM) and recheck. Repair or replace.
4 TP Sensor Performance check :
1) Check “TP Sensor” referring to Section 6E2.
Is check result as specified?
Go to Step 5. Faulty TP sensor.
5 TP Sensor Reference Voltage check :
1) With ignition switch OFF, disconnect TP
sensor coupler.
2) With ignition switch ON, check voltage
between “GRY/RED” wire terminal of TP
sensor coupler and ground.
Is the voltage 4.5 – 5.5 V?
Go to Step 6. Faulty “GRY/RED” wire.
If OK, substitute a known-
good ECM (PCM) and
recheck.
6 TP Sensor Ground Circuit check :
1) Check continuity between “GRY/YEL” wire
terminal of TP sensor coupler and ground.
Is continuity in good condition?
Go to Step 7. Faulty “GRY/YEL” wire.
If OK, substitute a known-
good ECM (PCM) and
recheck.
7 TP Sensor Installation check :
1) Check “TP Sensor” installation referring to
Section 6E2.
Is TP sensor installation as specified?
Substitute a known-good
ECM (PCM) and recheck. Adjust TP sensor referring
to “TP Sensor” in Section
6E2 and recheck.