Suzuki 2000 Grand Vitara SQ416, Руководство по обслуживанию

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YH4
GRAND
VITARA
6-50 ENGINE DIAGNOSIS (G16 / J20 ENGINES)
TROUBLESHOOTING
STEP ACTION YES NO
1 Was “ENGINE DIAG. FLOW TABLE” performed? Go to Step 2. Go to “ENGINE DIAG.
FLOW TABLE”.
2 Check ECT Sensor and Its Circuit.
1) Connect scan tool with ignition switch OFF.
2) Turn ignition switch ON.
3) Check engine coolant temp. displayed on scan
tool.
Is – 40
_
C (– 40
_
F) or 164
_
C (327
_
F) indicated?
Go to Step 3. Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection”
in Section 0A.
3 Check Wire Harness.
1) Disconnect ECT sensor connector with ignition
switch OFF.
2) Check for proper connection to ECT sensor at
“Or / B” and “Bl” wire terminals.
3) If OK, then with ignition switch ON, is voltage
applied to “Or / B” wire terminal about 4 – 6 V?
Go to Step 4. “Or / B” wire open or
shorted to power, or
poor C51-3-2
connection.
If wire and connection
are OK, substitute a
known-good ECM
(PCM) and recheck.
4 Does scan tool indicate – 40
_
C (– 40
_
F) at Step 2? Go to Step 6. Go to Step 5.
5 Check Wire Harness.
1) Disconnect ECT sensor connector.
2) Check intake air temp. displayed on scan tool.
Is – 40
_
C (– 40
_
F) indicated?
Replace ECT
sensor. “Or / B” wire shorted to
ground.
If wire is OK, substitute
a known-good ECM
(PCM) and recheck.
6 Check Wire Harness.
1) Using service wire, connect ECT sensor
connector terminals.
2) Turn ignition switch ON and check engine
coolant temp. displayed on scan tool.
Is 164
_
C (327
_
F) indicated?
Replace ECT
sensor. “Bl / W” wire open or
poor C51-3-23
connection.
If wire and connection
are OK, substitute a
known-good ECM
(PCM) and recheck.