Nissan Altima L32. Instruction — part 586
P2A00, P2A03 A/F SENSOR 1
EC-1465
< COMPONENT DIAGNOSIS >
[VQ35DE]
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3. Check the voltage between A/F sensor 1 harness connector and
ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> GO TO 7.
7.
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 IPDM E/R
>> Repair or replace harness or connectors.
8.
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.
5. 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.
DTC
A/F sensor
Ground
Voltage (V)
Bank
Connector
Terminal
P2A00
1
F12
4
Ground
Battery voltage
P2A03
2
F61
4
PBIB3308E
DTC
A/F sensor 1
ECM
Continuity
Bank
Connector
Terminal
Connector
Terminal
P2A00
1
F12
1
F13
45
Existed
2
49
P2A03
2
F61
1
53
2
57
DTC
A/F sensor 1
Ground
Continuity
Bank
Connector
Terminal
P2A00
1
F12
1
Ground
Not existed
2
P2A03
2
F61
1
2
DTC
ECM
Ground
Continuity
Connector
Terminal
P2A00
F13
45
Ground
Not existed
49
P2A03
53
57
EC-1466
< COMPONENT DIAGNOSIS >
[VQ35DE]
P2A00, P2A03 A/F SENSOR 1
9.
CHECK INTERMITTENT INCIDENT
Perform
GI-42, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Repair or replace malfunctioning part.
10.
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 (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).
>> INSPECTION END
ASCD BRAKE SWITCH
EC-1467
< COMPONENT DIAGNOSIS >
[VQ35DE]
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ASCD BRAKE SWITCH
Description
INFOID:0000000004362344
When the brake pedal is depressed, ASCD brake switch is turned OFF and stop lamp switch is turned ON.
ECM detects the state of the brake pedal by those two types of input (ON/OFF signal).
for the ASCD function.
Component Function Check
INFOID:0000000004362345
1.
CHECK ASCD BRAKE SWITCH FUNCTION
With CONSULT-III
1. Turn ignition switch ON.
2. Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-III.
3. Check “BRAKE SW1” indication under the following conditions.
Without CONSULT-III
1. Turn ignition switch ON.
2. Check the voltage between ECM harness connectors.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
EC-1467, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000004458156
1.
CHECK OVERALL FUNCTION-I
Check which type of transmission the vehicle is equipped with.
Which type of transmission?
CVT
>> GO TO 2.
M/T
>> GO TO 6.
2.
CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector.
3. Turn ignition switch ON.
Monitor item
Condition
Indication
BRAKE SW1
Brake pedal (CVT)
Brake pedal and clutch pedal (M/T)
Slightly depressed
OFF
Fully released
ON
ECM
Condition
Voltage
Con-
nector
+
–
Terminal
Terminal
E10
110
(ASCD
brake
switch
signal)
112
Brake pedal (CVT)
Brake pedal and
clutch pedal (M/T)
Slightly
depressed
Approx. 0 V
Fully re-
leased
Battery voltage
JMBIA1881ZZ
EC-1468
< COMPONENT DIAGNOSIS >
[VQ35DE]
ASCD BRAKE SWITCH
4. Check the voltage between ASCD brake switch harness con-
nector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
• Fuse block (J/B) connector E6
• 10 A fuse (No. 3)
• Harness for open or short between ASCD brake switch and fuse
>> Repair open circuit, short to ground or short to power in harness or connectors.
4.
CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between ASCD brake switch harness connector and ECM harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
5.
CHECK ASCD BRAKE SWITCH
EC-1470, "Component Inspection (ASCD Brake Switch)"
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> Replace ASCD brake switch.
6.
CHECK ASCD BRAKE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ASCD clutch switch harness connector.
3. Turn ignition switch ON.
4. Check the voltage between ASCD clutch switch harness con-
nector and ground.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> GO TO 7.
7.
CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT
ASCD brake switch
Ground
Voltage (V)
Connector
Terminal
E37
1
Ground
Battery voltage
PBIB0857E
ASCD brake switch
ECM
Continuity
Connector
Terminal
Connector
Terminal
E37
2
E10
110
Existed
ASCD clutch switch
Ground
Condition
Voltage (V)
Connector
Terminal
E39
1
Ground
Brake pedal
Slightly de-
pressed
Approx. 0
Fully released
Battery voltage
PBIB0857E
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