Nissan Altima L32. Instruction — part 592
FUEL PUMP
EC-1489
< COMPONENT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
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A
EC
N
P
O
1. Disconnect “fuel level sensor unit and fuel pump” harness connector.
2. Check the continuity between “fuel level sensor unit and fuel pump” harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 15.
NO
>> GO TO 14.
14.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors B10, E29 (with rear view monitor)
• Harness for open or short between “fuel level sensor unit and fuel pump” and ground
>> Repair open circuit or short to power in harness or connectors.
15.
CHECK FUEL PUMP
EC-1489, "Component Inspection (Fuel Pump)"
.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Replace fuel pump.
16.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace IPDM E/R.
NO
>> Repair or replace harness or connectors.
Component Inspection (Fuel Pump)
INFOID:0000000004362370
1.
CHECK FUEL PUMP
1. Turn ignition switch OFF.
2. Disconnect “fuel level sensor unit and fuel pump” harness connector.
3. Check resistance between “fuel level sensor unit and fuel pump”
terminals as per the following.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace “fuel level sensor unit and fuel pump”
Component Inspection (Condenser-1)
INFOID:0000000004458313
1.
CHECK CONDENSER
1. Turn ignition switch OFF.
2. Disconnect condenser-1 harness connector.
Fuel level sensor unit and fuel
pump
Ground
Continuity
Connector
Terminal
B42
3
Ground
Existed
Terminals
Resistance
1 and 3
0.2 - 5.0
Ω [at 25°C (77°F)]
SEC918C
EC-1490
< COMPONENT DIAGNOSIS >
[VQ35DE]
FUEL PUMP
3. Check resistance between condenser-1 terminals as follows.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace condenser.
Terminals
Resistance
1 and 2
Above 1 M
Ω [at 25°C (77°F)]
PBIB0794E
IGNITION SIGNAL
EC-1491
< COMPONENT DIAGNOSIS >
[VQ35DE]
C
D
E
F
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EC
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IGNITION SIGNAL
Description
INFOID:0000000004362371
The ignition signal from the ECM is sent to and amplified by the power transistor. The power transistor turns
ON and OFF the ignition coil primary circuit. This ON/OFF operation induces the proper high voltage in the coil
secondary circuit.
Component Function Check
INFOID:0000000004362372
1.
INSPECTION START
Turn ignition switch OFF, and restart engine.
Does the engine start?
YES-1 >> With CONSULT-III: GO TO 2.
YES-2 >> Without CONSULT-III: GO TO 3.
NO
>> Go to
EC-1491, "Diagnosis Procedure"
2.
CHECK IGNITION SIGNAL FUNCTION
With CONSULT-III
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-III.
2. Check that each circuit produces a momentary engine speed drop.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
EC-1491, "Diagnosis Procedure"
3.
CHECK IGNITION SIGNAL FUNCTION
Without CONSULT-III
1. Let engine idle.
2. Read the voltage signal between ECM harness connector termi-
nals with an oscilloscope.
NOTE:
The pulse cycle changes depending on rpm at idle.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
EC-1491, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000004362373
1.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF, wait at least 10 seconds and then turn it ON.
ECM
Voltage signal
+
–
Connec-
tor
Terminal
Connec-
tor
Terminal
F14
9
E10
112
10
11
18
19
21
JMBIA1886GB
JMBIA0035GB
EC-1492
< COMPONENT DIAGNOSIS >
[VQ35DE]
IGNITION SIGNAL
2. Check the voltage between ECM harness connector and
ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Refer to
EC-1175, "Diagnosis Procedure"
2.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect condenser harness connector.
3. Turn ignition switch ON.
4. Check the voltage between condenser harness connector and
ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-III
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector.
3. Check the continuity between IPDM E/R harness connector and condenser harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> Refer to
EC-1175, "Diagnosis Procedure"
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
4.
CHECK CONDENSER GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check the continuity between condenser harness connector and ground.
3. Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair open circuit or short to power in harness or connectors.
5.
CHECK CONDENSER
EC-1495, "Component Inspection (Condenser)"
ECM
Voltage
Connector
+
–
Terminal
Terminal
E10
105
112
Battery voltage
JMBIA1887ZZ
Condenser
Ground
Voltage
Connector
Terminal
F26
1
Ground
Battery voltage
PBIB0624E
IPDM E/R
Condenser
Continuity
Connector
Terminal
Connector
Terminal
F10
49
F26
1
Existed
Condenser
Ground
Continuity
Connector
Terminal
F26
2
Ground
Existed
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