 DTC DETECTION LOGIC
To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1 signal fluctuates according to fuel feedback control. DTC No.
| Trouble diagnosis name
| DTC detecting condition
| Possible Cause
| P0130
| Air fuel ratio (A/F) sensor 1 (bank 1) circuit
| A)
| The A/F signal computed by ECM from the A/F sensor 1 signal is constantly in the range other than approx. 2.2 V.
| - Harness or connectors
(The A/F sensor 1 circuit is open or shorted.)
- A/F sensor 1
| B)
| The A/F signal computed by ECM from the A/F sensor 1 signal is constantly approx. 2.2 V.
| P0150
| Air fuel ratio (A/F) sensor 1 (bank 2) circuit
| A)
| The A/F signal computed by ECM from the A/F sensor 1 signal is constantly in the range other than approx. 2.2 V.
| B)
| The A/F signal computed by ECM from the A/F sensor 1 signal is constantly approx. 2.2 V.
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 DTC CONFIRMATION PROCEDURE
 1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test. - Turn ignition switch OFF and wait at least 10 seconds.
- Turn ignition switch ON.
- Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:Before performing the following procedure, confirm that battery voltage is more than 11 V at idle. >>GO TO 2.
 2.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A
 3.CHECK AIR FUEL RATIO (A/F) SENSOR 1 FUNCTION
- Start engine and warm it up to normal operating temperature.
- Select “A/F SEN1 (B1)” or “A/F SEN1 (B2)” in “DATA MONITOR” mode with CONSULT-III.
- Check “A/F SEN1 (B1)” or “A/F SEN1 (B2)” indication.
Does the indication fluctuates around 2.2 V?
YES >>GO TO 4. NO >>Go to Diagnosis Procedure (GT-R certified NISSAN dealer).
 4.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-I
- Select “A/F SEN1 (B1) P1276” (for DTC P0130) or “A/F SEN1 (B2) P1286” (for DTC P0150) of “A/F SEN1” in “DTC WORK SUPPORT” mode with CONSULT-III.
- Touch “START”.
- When the following conditions are met, “TESTING” will be displayed on the CONSULT-III screen.
ENG SPEED
| 1,250 - 2,900 rpm
| VHCL SPEED SE
| More than 64 km/h (40 MPH)
| B/FUEL SCHDL
| 1.0 - 8.0 msec
| Selector lever
| A position
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If “TESTING” is not displayed after 20 seconds, retry from step 2.■ CAUTION ■ Always drive vehicle at a safe speed.
Is “TESTING” displayed on CONSULT-III screen?
YES >>GO TO 5. NO >>Check A/F sensor 1 function again. GO TO 3.
 5.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-II
Release accelerator pedal fully. NOTE: Never apply brake during releasing the accelerator pedal.Which does “TESTING” change to? COMPLETED >>GO TO 6. OUT OF CONDITION >>Retry DTC CONFIRMATION PROCEDURE. GO TO 4.
 6.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-III
 7.PERFORM COMPONENT FUNCTION CHECK FOR MALFUNCTION B
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