Nissan Sentra. Manual — part 379
EC-212
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
P0130 A/F SENSOR 1
2. Disconnect A/F sensor 1 harness connector.
3. Turn ignition switch ON.
4. Check the voltage between A/F sensor 1 harness connector and ground.
*1: Except California
*2: For California
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector.
3. Check the continuity between A/F sensor 1 harness connector and IPDM E/R harness connector.
*1: Except California
*2: For California
4. Also check harness for short to ground.
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for power supply circuit.
NO
>> Repair or replace error-detected parts.
3.
CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT
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.
*1: Except California
*2: For California
4. Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector
and ground.
+
−
Voltage
A/F sensor 1
Connector
Terminal
F12
*1
F42
*2
4
Ground
Battery voltage
+
−
Continuity
A/F sensor 1
IPDM E/R
Connector
Terminal
Connector
Terminal
F12
*1
F42
*2
4
E45
26
Existed
+
−
Continuity
A/F sensor 1
ECM
Connector
Terminal
Connector
Terminal
F12
*1
F42
*2
1
F24
41
Existed
2
45
P0130 A/F SENSOR 1
EC-213
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
*1: Except California
*2: For California
5. Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts.
4.
CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to
GI-39, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace air fuel ratio (A/F) sensor 1. Refer to
NO
>> Repair or replace error-detected parts.
+
−
Continuity
A/F sensor 1
Connector
Terminal
F12
*1
F42
*2
1
Ground
Not existed
2
+
−
Continuity
ECM
Connector
Terminal
F24
41
Ground
Not existed
45
EC-214
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
P0131 A/F SENSOR 1
P0131 A/F SENSOR 1
DTC Logic
INFOID:0000000009758478
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 is not inordinately low.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5 V at idle.
>> GO TO 2.
2.
CHECK A/F SENSOR FUNCTION
With CONSULT
1. Start engine and warm it up to normal operating temperature.
2. Select “A/F SEN1 (B1)” in “DATA MONITOR” mode of “ENGINE” using CONSULT.
3. Check “A/F SEN1 (B1)” indication.
With GST
Follow the procedure “With CONSULT” above.
Is the indication constantly approx. 0 V?
YES
>> Proceed to
.
NO
>> GO TO 3.
3.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Turn ignition switch OFF, wait at least 10 seconds and then restart engine.
2. Drive and accelerate vehicle to more than 40 km/h (25 MPH) within 20 seconds after restarting engine.
CAUTION:
Always drive vehicle at a safe speed.
3. Maintain the following conditions for about 20 consecutive seconds.
NOTE:
• Keep the accelerator pedal as steady as possible during the cruising.
• If this procedure is not completed within 1 minute after restarting engine at step 1, return to step
1.
4. Check 1st trip DTC.
With GST
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P0131
A/F SENSOR1 (B1)
(O2 sensor circuit low volt-
age bank 1 sensor 1)
The A/F signal computed by ECM from the A/F
sensor 1 signal is constantly approx. 0 V.
• Harness or connectors
(A/F sensor 1 circuit is open or
shorted.)
• A/F sensor 1
ENG SPEED
1,000 - 3,200 rpm
VHCL SPEED SE
More than 40 km/h (25 mph)
B/FUEL SCHDL
1.5 - 9.0 msec
Selector lever
Suitable position
P0131 A/F SENSOR 1
EC-215
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Follow the procedure “With CONSULT” above.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009758479
1.
CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect A/F sensor 1 harness connector.
3. Turn ignition switch ON.
4. Check the voltage between A/F sensor 1 harness connector and ground.
*1: Except California
*2: For California
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector.
3. Check the continuity between A/F sensor 1 harness connector and IPDM E/R harness connector.
*1: Except California
*2: For California
4. Also check harness for short to ground.
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for power supply circuit.
NO
>> Repair or replace error-detected parts.
3.
CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT
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.
*1: Except California
+
−
Voltage
A/F sensor 1
Connector
Terminal
F12
*1
F42
*2
4
Ground
Battery voltage
+
−
Continuity
A/F sensor 1
IPDM E/R
Connector
Terminal
Connector
Terminal
F12
*1
F42
*2
4
E45
26
Existed
+
−
Continuity
A/F sensor 1
ECM
Connector
Terminal
Connector
Terminal
F12
*1
F42
*2
1
F24
41
Existed
2
45
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