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- Refer to Code No. P0131: Right bank oxygen sensor (front) circuit
low voltage

- Refer to Code No. P0201: No. 1 injector system

- Refer to Code No. P0203: No. 3 injector system

- Refer to Code No. P0205: No. 5 injector system

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- The engine-ECU effects air/fuel ratio feedback control
in accordance with the signals from the right bank oxygen sensor (front).
- If the right bank oxygen sensor (front) has deteriorated, corrections will be made
by the right bank oxygen sensor (rear).
- Code No. P0134 becomes stored in memory if a failure is detected in the above air/fuel
ratio feedback control system.
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Check Conditions
- More than 20 seconds have passed since the engine starting sequence was completed.
- Engine coolant temperature is more than 7°C.
- Engine speed is more than 1,200 r/min.
- Volumetric efficiency is more than 30 %.
- Throttle position sensor output voltage is less than 4 V.
- Except while fuel is being shut off.
- Monitoring time: 30 seconds.
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Judgment Criterion
- Right bank oxygen sensor (front) output voltage does not get across lean/rich criteria
(about 0.5 V) within about 30 seconds.
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- Failed right bank oxygen sensor (front)
- Harness damage in right bank oxygen sensor (front) circuit
- Failed right bank injector
- Harness damage in right bank injector circuit
- Exhaust leak
- Air drawn in from gaps in gasket, seals, etc.
- Incorrect fuel pressure
- Failed engine-ECU
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- Refer to Data List Reference Table
.
- Item AC: Right bank oxygen sensor (front)
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Q.
Is the check result normal?
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Intermittent malfunction (Refer to GROUP 00 -
How to Use Troubleshooting/Inspection
Service Points -
How to Cope with Intermittent Malfunctions ).
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Q.
Is the check result normal?
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Q.
Is the check result normal?
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Q.
Is the check result normal?
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Repair or replace the connector.
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- Check right bank oxygen sensor (front) itself (Refer to
).
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Q.
Is the check result normal?
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Replace the right bank oxygen sensor (front).
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Q.
Is the check result normal?
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Repair or replace the connector.
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- Measure the resistance between terminal No. 6 and
No. 7 when measuring No. 1 cylinder.
- Measure the resistance between terminal No. 6 and No. 8 when measuring No. 3 cylinder.
- Measure the resistance between terminal No. 6 and No. 9 when measuring No. 5 cylinder.
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Q.
Are the check results normal?
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- B-102 (No. 1 injector connector).
- B-105 (No. 3 injector connector).
- B-127 (No. 5 injector connector).
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Q.
Are the check results normal?
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Repair or replace the connector.
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Check No. 1, No. 3 and No. 5 injector itself (Refer to ).
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Q.
Are the check results normal?
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Check and repair harness between intermediate connector
and injector connector.
- Check and repair harness between B-44 (terminal No.
7) intermediate connector and B-102 (terminal No. 2) No. 1 injector connector
- Check and repair harness between B-44 (terminal No. 8) intermediate connector and
B-105 (terminal No. 2) No. 3 injector connector
- Check and repair harness between B-44 (terminal No. 9) intermediate connector and
B-127 (terminal No. 2) No. 5 injector connector
- Check output line for damage.
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Q.
Is the check result normal?
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Repair or replace the connector.
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- Check output line for damage.
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Q.
Is the check result normal?
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Repair the damaged harness wire.
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- Check and repair harness between B-44 (terminal No.
7) intermediate connector and B-29 (terminal No. 2) engine-ECU connector.
- Check and repair harness between B-44 (terminal No. 8) intermediate connector and
B-29 (terminal No. 18) engine-ECU connector.
- Check and repair harness between B-44 (terminal No. 9) intermediate connector and
B-29 (terminal No. 50) engine-ECU connector.
- Check output line for damage.
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Q.
Are the check results normal?
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Repair the damaged harness wire.
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- Fuel pressure measurement (Refer to Fuel Pressure Test
).
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Q.
Is the check result normal?
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