ENGINE GENERAL INFORMATION AND DIAGNOSIS (G16/J20 ENGINES) 6-73
TROUBLESHOOTING (DTC P0130)
Fig. 1 for Step 2
Step Action Yes No
1Was “Engine Diag. Flow Table” performed? Go to Step 2. Go to “Engine Diag. Flow
Ta bl e ”.
2 HO2S-1 Output Voltage Check :
1) Connect scan tool to DLC with ignition
switch OFF.
2) Warm up engine to normal operating tem-
perature and keep it at 2000 r/min. for 60
sec.
3) Repeat racing engine (Repeat depressing
accelerator pedal 5 to 6 times continuously
to enrich A/F mixture and take foot off from
pedal to enlean) and check HO2S output
voltage displayed on scan tool. See Fig. 1.
Is over 0.6 V and below 0.3 V indicated?
Go to Step 4. Go to Step 3.
3HO2S-1 Check :
1) With ignition switch OFF, disconnect HO2S-
1 connector.
2) Check for proper connection to HO2S-1 at
each terminal.
3) If OK, connect voltmeter “GRY/YEL” wire
terminal and “RED” wire terminal of HO2S-1
connector.
4) Start engine and check voltmeter while
repeating racing engine.
Is over 0.6 V and below 0.3 V indicated?
“RED” or “GRY/YEL” cir-
cuit open or short.
If wire and connections
are OK, substitute a
known-good ECM (PCM)
and recheck.
Replace HO2S-1.
4 Short Term Fuel Trim Check :
1) Run engine at 2000 r/min. for 60 sec.
2) With engine idling, check short term fuel
trim displayed on scan tool.
Is it within –20 to +20%?
Intermittent trouble or
faulty ECM (PCM).
Check for intermittent
referring to “Intermittent
and Poor Connection” in
Section 0A.
Go to DTC P0171/P0172
Diag. Flow Table.
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