Nissan Titan A60. Instruction — part 446
EC-450
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
FUEL PUMP
Check voltage between IPDM E/R terminal 46 and ground with
CONSULT-III or tester.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 14.
4.
DETECT MALFUNCTIONING PART
Check harness for open or short between IPDM E/R and ECM
>> Repair harness or connectors.
5.
CHECK CONDENSER-2 POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect condenser-2 harness connector.
4. Turn ignition switch ON.
5. Check voltage between condenser-2 terminal 1 and ground with
CONSULT-III or tester.
6. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 6.
6.
CHECK 15A FUSE
1. Turn ignition switch OFF.
2. Disconnect 15A fuse.
3. Check 15A fuse.
OK or NG
OK
>> GO TO 7.
NG
>> Replace fuse.
7.
CHECK CONDENSER-2 POWER SUPPLY CIRCUIT-II FOR OPEN AND SHORT
1. Disconnect IPDM E/R harness connector E119.
2. Check harness continuity between IPDM E/R terminal 13 and condenser-2 terminal 1.
Refer to Wiring Diagram.
Voltage: Battery voltage
PBIB2656E
BBIA0388E
Voltage:
Battery voltage should exist for 1 sec-
ond after ignition switch is turned ON.
PBIB0624E
Continuity should exist.
FUEL PUMP
EC-451
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
3. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 14.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
8.
CHECK CONDENSER-2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between condenser-2 terminal 2 and ground.
Refer to Wiring Diagram.
2. Also check harness for short to power.
OK or NG
OK
>> GO TO 9.
NG
>> Repair open circuit or short to power in harness or connectors.
9.
CHECK CONDENSER-2
EC-452, "Component Inspection"
OK or NG
OK
>> GO TO 10.
NG
>> Replace condenser-2.
10.
CHECK FUEL PUMP POWER SUPPLY AND GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect “fuel level sensor unit and fuel pump” harness con-
nector.
3. Disconnect IPDM E/R harness connector E119.
4. Disconnect dropping resistor harness connector.
5. Check harness continuity between IPDM E/R terminal 13 and
“fuel level sensor unit and fuel pump” terminal 1, “fuel level sen-
sor unit and fuel pump” terminal 2 and dropping resistor terminal
2, dropping resistor terminal 1 and ground.
Refer to Wiring Diagram.
6. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 12.
NG
>> GO TO 11.
11.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E41, C1
• Harness for open or short between fuel pump and IPDM E/R
• Harness for open or short between fuel pump and dropping resistor
• Harness for open or short between dropping resistor and ground
>> Repair open circuit or short to ground or short to power in harness or connectors.
12.
CHECK DROPPING RESISTOR
EC-452, "Component Inspection"
OK or NG
OK
>> GO TO 13.
NG
>> Replace dropping resistor.
13.
CHECK FUEL PUMP
EC-452, "Component Inspection"
OK or NG
Continuity should exist.
Continuity should exist.
BBIA0442E
EC-452
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
FUEL PUMP
OK
>> GO TO 14.
NG
>> Replace “fuel level sensor unit and fuel pump”.
14.
CHECK INTERMITTENT INCIDENT
GI-36, "How to Check Terminal"
and
GI-39, "Intermittent Incident"
OK or NG
OK
>> Replace IPDM E/R.
NG
>> Repair or replace harness or connectors.
Component Inspection
INFOID:0000000006158931
FUEL PUMP
1. Disconnect “fuel level sensor unit and fuel pump” harness connector.
2. Check resistance between fuel level sensor unit and fuel pump
terminals 1 and 3.
DROPPING RESISTOR
1. Turn ignition switch OFF.
2. Disconnect dropping resistor harness connector.
3. Check resistance between dropping resistor terminals as 1 and
2.
CONDENSER-2
1. Turn ignition switch OFF.
2. Disconnect condenser-2 harness connector.
3. Check resistance between condenser-2 terminals as 1 and 2.
Resistance: 0.2 - 5.0
Ω [at 25°C (77°F)]
SEC918C
Resistance
Above 1 M
Ω at 25°C (77°F)
PBIB0131E
Resistance
Above 1 M
Ω at 25°C (77°F)
PBIB0794E
IGNITION SIGNAL
EC-453
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
IGNITION SIGNAL
Component Description
INFOID:0000000006158932
IGNITION COIL & POWER TRANSISTOR
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.
Diagnosis Procedure
INFOID:0000000006158933
1.
CHECK ENGINE START
Turn ignition switch OFF, and restart engine.
Is engine running?
Yes or No
Yes (With CONSULT-III)>>GO TO 2.
Yes (Without CONSULT-III)>>GO TO 3.
No
>> GO TO 4.
2.
CHECK OVERALL 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.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 10.
3.
CHECK OVERALL FUNCTION
Without CONSULT-III
1. Let engine idle.
2. Read the voltage signal between ECM terminals 46, 60, 61, 62,
65, 79, 80, 81 and ground with an oscilloscope.
3. Verify that the oscilloscope screen shows the signal wave as
shown below.
NOTE:
The pulse cycle changes depending on rpm at idle.
OK or NG
1.
Ignition coils (with power transistor)
(bank 2)
2.
Ignition coils (with power transistor)
(bank 1)
BBIA0777E
PBIB2094E
PBIB0044E
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст