Heated Oxygen Sensor (Ho2S) Circuit Slow Response (Sensor-1) - Suzuki Swift User Manual
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INSPECTION
STEP
1
Was "ENGINE DIAG. FLOW TABLE" performed?
2
Is there DTC(s) other than HO2S-1
(DTC P0130)?
3
1) Connect scan tool to DLC with ignition switch
OFF.
2) Warm up engine to normal operating
temperature and keep it at 2000 r/min. for
60 sec.
3) Repeat racing engine (Repeat depressing
accelerator pedal 5 to 6 times continuously
and take foot off from pedal to enrich and
enlean A/F mixture). See Fig. 1 and 2.
Does HO2S-1 output voltage deflect between
0.3 V and over 0.6 V repeatedly?
Fig. 1 for Step 3
DTC P0133 HEATED OXYGEN SENSOR (HO2S) CIRCUIT SLOW RESPONSE
(SENSOR-1)
WIRING DIAGRAM/CIRCUIT DESCRIPTION – Refer to DTC P0130 section.
DTC DETECTING CONDITION
D When running at specified idle speed after engine
warmed up and running at specified vehicle speed,
response time (time to change from lean to rich or
from rich to lean) of HO2S-1 output voltage is about
1 sec. at minimum or average time of 1 cycle is 5 sec.
at minimum. See. Fig. 1
: 2 driving cycle detection logic, Monitoring once/1
driving.
Fig. 1
1 cycle time
HO2S-1
Output
voltage
Response time
ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10) 6-55
ACTION
Fig. 2 for Step 3
Normal
YES
Go to Step 2.
Go to applicable DTC
Diag. Flow Table.
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection"
in Section 0A.
POSSIBLE CAUSE
D Heated oxygen sensor-1 malfunction
NO
Go to "ENGINE DIAG.
FLOW TABLE".
Go to Step 3.
Check "R" and "G"
wires for open and
short, and connections
for poor connection.
If wires and connections
are OK, replace
HO2S-1.
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