Infiniti EX35. Manual — part 674
EC-438
< COMPONENT DIAGNOSIS >
[VQ35HR]
P2A00, P2A03 A/F SENSOR 1
• 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-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” and “A/F ADJ-B2” 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-20, "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” and “A/F ADJ-B2” in “DATA MONITOR” mode with CONSULT-III.
3.
Make sure that “0.000” is displayed on CONSULT-III screen.
>> INSPECTION END
ASCD BRAKE SWITCH
EC-439
< COMPONENT DIAGNOSIS >
[VQ35HR]
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ASCD BRAKE SWITCH
Description
INFOID:0000000003133617
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).
Refer to
for the ASCD function.
Component Function Check
INFOID:0000000003133618
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 connector terminals as follows.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000003133619
1.
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 connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
DETECT MALFUNCTIONING PART
Check the following.
• Fuse block (J/B) connector E103
• 10A fuse (No. 3)
• Harness for open or short between ASCD brake switch and fuse
Monitor item
Condition
Indication
BRAKE SW1
Brake pedal
Slightly depressed
OFF
Fully released
ON
ECM
Condition
Voltage (V)
Connector
+
–
Terminal
Terminal
M107
126
(ASCD brake switch signal)
128
Brake pedal
Slightly depressed
Approx. 0
Fully released
Battery voltage
ASCD brake switch
Ground
Voltage
Connector
Terminal
E109
1
Ground
Battery voltage
EC-440
< COMPONENT DIAGNOSIS >
[VQ35HR]
ASCD BRAKE SWITCH
>> Repair open circuit or short to ground in harness or connectors.
3.
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
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E106, M6
• Harness for open or short between ECM and ASCD brake switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.
CHECK ASCD BRAKE SWITCH
EC-440, "Component Inspection (ASCD Brake Switch)"
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace ASCD brake switch.
6.
CHECK INTERMITTENT INCIDENT
GI-38, "Intermittent Incident"
>> INSPECTION END
Component Inspection (ASCD Brake Switch)
INFOID:0000000003133620
1.
CHECK ASCD BRAKE SWITCH-I
1.
Turn ignition switch OFF.
2.
Disconnect ASCD brake switch harness connector.
3.
Check the continuity between ASCD brake switch terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
CHECK ASCD BRAKE SWITCH-II
1.
Adjust ASCD brake switch installation. Refer to
BR-7, "Inspection and Adjustment"
.
2.
Check the continuity between ASCD brake switch terminals under the following conditions.
ASCD brake switch
ECM
Continuity
Connector
Terminal
Connector
Terminal
E109
2
M107
126
Existed
Terminals
Condition
Continuity
1 and 2
Brake pedal
Fully released
Existed
Slightly depressed
Not existed
Terminals
Condition
Continuity
1 and 2
Brake pedal
Fully released
Existed
Slightly depressed
Not existed
ASCD BRAKE SWITCH
EC-441
< COMPONENT DIAGNOSIS >
[VQ35HR]
C
D
E
F
G
H
I
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K
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A
EC
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P
O
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace ASCD brake switch.
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