1.CHECK GROUND CONNECTION
Turn ignition switch OFF.
Check ground connection M95. Refer to Ground Inspection in
Circuit Inspection
.
Is the inspection result normal?
YES
>>
GO TO 2
.
NO
>>
Repair or replace ground connection.
2.RETIGHTEN A/F SENSOR 1
Loosen and retighten the A/F sensor 1. Refer to
Disassembly and Assembly (GT-R certified NISSAN dealer)
.
>>
GO TO 3
.
3.CHECK EXHAUST GAS LEAK
Start engine and run it at idle.
Listen for an exhaust gas leak before three way catalyst 1.
Is exhaust gas leak detected?
YES
>>
Repair or replace malfunctioning part.
NO
>>
GO TO 4
.
4.CHECK FOR INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
Is intake air leak detected?
YES
>>
Repair or replace malfunctioning part.
NO
>>
GO TO 5
.
5.CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE
Clear the mixture ratio self-learning value. Refer to
Special Repair Requirement (GT-R certified NISSAN dealer)
.
Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171, P172, P0174 or P0175 detected? Is it difficult to start engine?
YES
>>
Perform trouble diagnosis for DTC P0171, P0174 or P0172, P0175. Refer to
DTC Logic (GT-R certified NISSAN dealer)
or
DTC Logic (GT-R certified NISSAN dealer)
.
NO
>>
GO TO 6
.
6.CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
Disconnect A/F sensor 1 harness connector.
Turn ignition switch ON.
Check the voltage between A/F sensor 1 harness connector and ground.
DTC
A/F sensor 1
Ground
Voltage
Bank
Connector
Terminal
P0133
1
F8
4
Ground
Battery voltage
P0153
2
F25
4
Is the inspection result normal?
YES
>>
GO TO 8
.
NO
>>
GO TO 7
.
7.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E3, F1
IPDM E/R harness connector E7
15A fuse (No. 46)
Harness for open or short between A/F sensor 1 and fuse
>>
Repair or replace harness or connectors.
8.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
Turn ignition switch OFF.
Disconnect ECM harness connector.
Check the continuity between A/F sensor 1 harness connector and ECM harness connector.
DTC
A/F sensor 1
ECM
Continuity
Bank
Connector
Terminal
Connector
Terminal
P0133
1
F8
1
F102
81
Existed
2
82
P0153
2
F25
1
85
2
86
Check the continuity between A/F sensor 1 harness connector or ECM harness connector and ground.
DTC
A/F sensor 1
ECM
Ground
Continuity
Bank
Connector
Terminal
Connector
Terminal
P0133
1
F8
1
F102
81
Ground
Not existed
2
82
P0153
2
F25
1
85
2
86
Also check harness for short to power.
Is the inspection result normal?
YES
>>
GO TO 9
.
NO
>>
Repair open circuit, short to ground or short to power in harness or connectors.
9.CHECK AIR FUEL RATIO (A/F) SENSOR 1 HEATER
Refer to
Component Inspection (GT-R certified NISSAN dealer)
.
Is the inspection result normal?
YES
>>
GO TO 10
.
NO
>>
GO TO 13
.
10.CHECK MASS AIR FLOW SENSOR
Check both mass air flow sensor (bank 1 and bank 2).
Refer to
Component Inspection (GT-R certified NISSAN dealer)
.
Is the inspection result normal?
YES
>>
GO TO 11
.
NO
>>
Replace malfunctioning mass air flow sensor.
11.CHECK PCV VALVE
Refer to
Component Inspection
.
Is the inspection result normal?
YES
>>
GO TO 12
.
NO
>>
Repair or replace PCV valve.
12.CHECK INTERMITTENT INCIDENT
Perform
Intermittent Incident
.
Is the inspection result normal?
YES
>>
GO TO 13
.
NO
>>
Repair or replace malfunctioning part.
13.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air fuel ratio (A/F) sensor 1.
■ CAUTION ■
Discard any A/F sensor which has been dropped from a height of more than 0.5 m (1.6 ft) onto a hard surface such as a concrete floor; use a new one.
Before installing new A/F sensor, clean exhaust system threads using Oxygen Sensor
Thread Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant (commercial service tool).
>>
INSPECTION END