Suzuki 2000 Grand Vitara SQ416, Руководство по обслуживанию

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YH4
GRAND
VITARA
ENGINE DIAGNOSIS (G16 / J20 ENGINES) 6-65
TROUBLESHOOTING (DTC P0141)
STEP ACTION YES NO
1 Was “ENGINE DIAG. FLOW TABLE” performed? Go to Step 2. Go to “ENGINE
DIAG. FLOW
TABLE”.
2 HO2S-2 Heater Check:
1) Disconnect HO2S-2 coupler with ignition
switch OFF.
2) Check resistance between “3” and “4” terminal of
HO2S-2 connector.
Is it within 11.7 – 14.3 (at 20
_
C, 68
_
F)?
Go to Step 3. Replace HO2S-2.
3 HO2S-2 Power Supply Check:
1) Connect HO2S-2 connector.
2) Check voltage between E61-3 terminal of ECM
(PCM) connector and body ground with ignition
switch ON.
Is it 10 – 14 V?
Go to Step 4. “B / W” or “P / G” circuit
open / shorted to
ground.
If wire and connec-
tions are OK, substi-
tute a known-good
ECM (PCM) and
recheck.
4 HO2S-2 Heater Operation Check:
1) Drive vehicle about 30 – 40 mph (50 – 60 km / h)
for 2 min. or more.
2) Stop vehicle and check voltage between E61-3
terminal of ECM (PCM) connector and body
ground with engine idling.
Is it 0 – 1 V?
Intermittent trouble.
Check intermittent
referring to “Intermit-
tent and Poor Connec-
tion” in Section 0A. Poor E61-3 connec-
tion.
If connection is OK,
substitute a known-
good ECM (PCM)
and recheck.