Nissan Altima L32. Instruction — part 332
P2A00 A/F SENSOR 1
EC-449
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
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• Discard any 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 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-III?
YES
>> GO TO 12.
NO
>> GO TO 13.
12.
CONFIRM A/F ADJUSTMENT DATA
With CONSULT-III
1. Turn ignition switch ON.
2. Select “A/F ADJ-B1” in “DATA MONITOR” mode with CONSULT-III.
3. Make sure that “0.000” is displayed on CONSULT-III screen.
Is “0.000” displayed?
YES
>> INSPECTION END
NO
>> GO TO 13.
13.
CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE
Clear the mixture ratio self-learning value. Refer to
EC-32, "MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Special Repair Requirement"
Do you have CONSULT-III?
YES
>> GO TO 14.
NO
>> INSPECTION END
14.
CONFIRM A/F ADJUSTMENT DATA
With CONSULT-III
1. Turn ignition switch ON.
2. Select “A/F ADJ-B1” in “DATA MONITOR” mode with CONSULT-III.
3. Make sure that “0.000” is displayed on CONSULT-III screen.
>> INSPECTION END
EC-450
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
ASCD BRAKE SWITCH
ASCD BRAKE SWITCH
Description
INFOID:0000000004349508
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 this input of two kinds (ON/OFF signal).
for the ASCD function.
Component Function Check
INFOID:0000000004349509
1.
CHECK FOR 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 connector and
ground.
Is the inspection result normal?
YES
>> INSPECTION END.
NO
>> Refer to
.
Diagnosis Procedure
INFOID:0000000004349510
1.
CHECK OVERALL FUNCTION-I
Check which type of transmission the vehicle is equipped with.
Is the inspection result normal?
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
Ground
Condition
Voltage
Connector
Terminal
E10
110
(ASCD
brake switch
signal)
Ground
Brake pedal (CVT)
Brake pedal and
clutch pedal (M/T)
Slightly
depressed
Approx.
0 V
Fully re-
leased
Battery
voltage
PBIB3602E
ASCD BRAKE SWITCH
EC-451
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
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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
• Junction block connector E44, E46
• 10A fuse (No. 3)
• Harness for open or short between ASCD brake switch and fuse
>> Repair open circuit or 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 or short to ground or short to power in harness or connectors.
5.
CHECK ASCD BRAKE SWITCH
EC-453, "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 continuity between ASCD clutch switch harness connector and ground.
5. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> GO TO 7.
ASCD brake switch
Ground
Voltage
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 depressed
Approx. 0
Fully released
Battery voltage
EC-452
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
ASCD BRAKE SWITCH
7.
CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector.
3. Turn ignition switch ON.
4. Check the voltage between ASCD brake switch harness con-
nector and ground.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> GO TO 8.
8.
DETECT MALFUNCTIONING PART
Check the following.
• Fuse block (J/B) connector E6
• Junction block connector E44, E46
• 10A fuse (No. 3)
• Harness for open or short between ASCD brake switch and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.
CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check the continuity between ASCD brake switch harness connector and ASCD clutch switch harness
connector.
3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
10.
CHECK ASCD BRAKE SWITCH
EC-453, "Component Inspection (ASCD Brake Switch)"
.
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> Replace ASCD brake switch.
11.
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 clutch 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 12.
ASCD brake switch
Ground
Voltage
Connector Terminal
E37
1
Ground Battery voltage
PBIB0857E
ASCD brake switch
ASCD clutch switch
Continuity
Connector Terminal Connector Terminal
E37
2
E39
1
Existed
ASCD clutch switch
ECM
Continuity
Connector Terminal Connector Terminal
E39
2
E10
110
Existed
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