Nissan Maxima. Instruction — part 492
EC-452
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P2096, P2097, P2098, P2099 A/F SENSOR 1
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Clear the mixture ratio self-learning value. Refer to
EC-24, "MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Special Repair Requirement"
.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Start engine and keep the engine speed between 3,500 and 4,000 rpm for 1 minute under no load.
6. Let engine idle for 1 minute.
7. Keep engine speed between 2,500 and 3,000 rpm for 20 minutes.
8. Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010095156
Regarding Wiring Diagram information, refer to
.
1.
CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E9. Refer to Ground Inspection in
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace ground connection.
2.
RETIGHTEN A/F SENSOR 1 AND HEATED OXYGEN SENSOR 2
Loosen and retighten the A/F sensor 1 and heated oxygen sensor 2. Refer to
.
>> GO TO 3.
3.
CHECK FOR EXHAUST GAS LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before the three way catalyst 2.
Is exhaust gas detected?
YES
>> Repair or replace.
NO
>> GO TO 4.
4.
CHECK FOR INTAKE AIR LEAKAGE
1. Start engine and run it at idle.
2. Listen for an intake air leakage after the mass air flow sensor.
Is intake air leakage detected?
YES
>> GO TO 5.
NO
>> Repair or replace malfunctioning part.
5.
CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE
1. Clear the mixture ratio self-learning value. Refer to
EC-24, "MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Special Repair Requirement"
.
2. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171, P0172, P0174 or P0175 detected? Is it difficult to start engine?
YES
>> Perform trouble diagnosis for DTC P0171, P0174 or P0172, P0175. Refer to
or
NO
>> GO TO 6.
6.
CHECK HARNESS CONNECTOR
P2096, P2097, P2098, P2099 A/F SENSOR 1
EC-453
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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1. Turn ignition switch OFF.
2. Disconnect A/F sensor 1 harness connector.
3. Check that water is not inside connectors.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace harness connector.
7.
CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect A/F sensor 1 harness connector.
2. Turn ignition switch ON.
3. Check the voltage between A/F sensor 1 harness connector and
ground.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> GO TO 8.
8.
DETECT MALFUNCTIONING PART
Check the following.
• IPDM E/R harness connector F10
• 15 A fuse (No. 37)
• Harness for open or short between A/F sensor 1 and fuse
>> Repair or replace harness or connectors.
9.
CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.
4. Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector
and ground.
DTC
A/F sensor
Ground
Voltage (V)
Bank
Connector
Terminal
P2096
P2097
1
F12
4
Ground
Battery voltage
P2098
P2099
2
F61
4
PBIB3308E
DTC
A/F sensor 1
ECM
Continuity
Bank
Connector
Terminal
Connector
Terminal
P2096
P2097
1
F12
1
F13
45
Existed
2
49
P2098
P2099
2
F61
1
53
2
57
DTC
A/F sensor 1
Ground
Continuity
Bank
Connector
Terminal
P2096
P2097
1
F12
1
Ground
Not existed
2
P2098
P2099
2
F61
1
2
EC-454
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P2096, P2097, P2098, P2099 A/F SENSOR 1
5. Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
10.
CHECK A/F SENSOR 1 HEATER
EC-172, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> GO TO 13.
11.
CHECK HEATED OXYGEN SENSOR 2
EC-235, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 12.
NO
>> Replace heated oxygen sensor 2. Refer to
EM-31, "Removal and Installation (LH)"
(LH) or
"Removal and Installation (RH)"
12.
CHECK INTERMITTENT INCIDENT
Perform
GI-41, "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. Refer to
EM-31, "Removal and Installation (LH)"
(LH) or
EM-33, "Removal and Installation (RH)"
CAUTION:
• Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) 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).
Do you have CONSULT?
YES
>> GO TO 14.
NO
>> GO TO 15.
14.
CONFIRM A/F ADJUSTMENT DATA
With CONSULT
1. Turn ignition switch ON.
2. Select “A/F ADJ-B1” and “A/F ADJ-B2” in “DATA MONITOR” mode with CONSULT.
3. Make sure that “0.000” is displayed on CONSULT screen.
Is “0.000” displayed?
YES
>> INSPECTION END
NO
>> GO TO 15.
15.
CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE
Clear the mixture ratio self-learning value. Refer to
EC-24, "MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Special Repair Requirement"
DTC
ECM
Ground
Continuity
Connector
Terminal
P2096
P2097
F13
45
Ground
Not existed
49
P2098
P2099
53
57
P2096, P2097, P2098, P2099 A/F SENSOR 1
EC-455
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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Do you have CONSULT?
YES
>> GO TO 16.
NO
>> INSPECTION END
16.
CONFIRM A/F ADJUSTMENT DATA
With CONSULT
1. Turn ignition switch ON.
2. Select “A/F ADJ-B1” and “A/F ADJ-B2” in “DATA MONITOR” mode with CONSULT.
3. Make sure that “0.000” is displayed on CONSULT screen.
>> INSPECTION END
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