Nissan Altima L32. Instruction — part 337
FUEL PUMP
EC-469
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
2. Also heck harness for short to power.
Is the inspection result normal?
YES
>> GO TO 12.
NO
>> Repair open circuit or short to power in harness or connectors.
12.
CHECK FUEL PUMP
EC-469, "Component Inspection (Fuel Pump)"
.
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> Replace fuel pump.
13.
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:0000000004349531
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 follows.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace “fuel level sensor unit and fuel pump”.
Component Inspection (Condenser-1)
INFOID:0000000004349532
1.
CHECK CONDENSER
1. Turn ignition switch OFF.
2. Disconnect condenser-1 harness connector.
3. Check resistance between condenser-1 terminals as follows.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace condenser-1.
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
Terminal
Resistance
1 and 2
Above 1 M
Ω [at 25°C (77°F)]
PBIB0794E
EC-470
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
IGNITION SIGNAL
IGNITION SIGNAL
Description
INFOID:0000000004349533
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:0000000004349534
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
2.
IGNITION SIGNAL FUNCTION
With CONSULT-III
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-III.
2. Make sure that each circuit produces a momentary engine speed drop.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
3.
IGNITION SIGNAL FUNCTION
Without CONSULT-III
1. Let engine idle.
2. Read the voltage signal between ECM harness connector and
ground.
NOTE:
The pulse cycle changes depending on rpm at idle.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000004349535
1.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
ECM
Ground
Voltage signal
Connector
Terminal
F14
9
Ground
10
11
21
PBIB3616E
JMBIA0085GB
IGNITION SIGNAL
EC-471
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
2. Check the voltage between ECM harness connector and
ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Go to
2.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect condenser-2 harness connector.
3. Turn ignition switch ON.
4. Check the voltage between condenser-2 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 F10.
3. Check the continuity between IPDM E/R harness connector and condenser-2 harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> Go to
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK CONDENSER-2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check the continuity between condenser-2 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 ground or short to power in harness or connectors.
5.
CHECK CONDENSER
EC-474, "Component Inspection (Condenser-2)"
Is the inspection result normal?
ECM
Ground
Voltage
Connector Terminal
E10
105
Ground Battery voltage
PBIA9575J
Condenser
Ground
Voltage
Connector Terminal
F26
1
Ground Battery voltage
PBIB0624E
IPDM E/R
Condenser-2
Continuity
Connector Terminal Connector Terminal
F10
53
F26
1
Existed
Condenser-2
Ground Continuity
Connector Terminal
F26
2
Ground
Existed
EC-472
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
IGNITION SIGNAL
YES
>> GO TO 6.
NO
>> Replace condenser.
6.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-V
1. Reconnect all harness connectors disconnected.
2. Disconnect ignition coil harness connector.
3. Turn ignition switch ON.
4. Check the voltage between ignition coil harness connector and
ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.
CHECK IGNITION COIL GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check the continuity between ignition coil harness connector and ground.
3. Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
8.
CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check the continuity between ECM harness connector and ignition coil harness connector.
3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.
CHECK IGNITION COIL WITH POWER TRANSISTOR
EC-473, "Component Inspection (Ignition Coil with Power Transistor)"
.
Ignition coil
Ground
Voltage
Cylinder Connector Terminal
1
F34
3
Ground Battery voltage
2
F35
3
3
F36
3
4
F37
3
PBIB0138E
Ignition coil
Ground Continuity
Cylinder Connector Terminal
1
F34
2
Ground
Existed
2
F35
2
3
F36
2
4
F37
2
Ignition coil
ECM
Continuity
Cylinder Connector Terminal Connector Terminal
1
F34
1
F14
11
Existed
2
F35
1
10
3
F36
1
9
4
F37
1
21
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