Infiniti M45 (Y34). Manual — part 458
DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
EC-521
C
D
E
F
G
H
I
J
K
L
M
A
EC
Wiring Diagram
ABS002PW
TBWA0306E
EC-522
DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic Procedure
ABS002PX
1.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten two ground screws.
Refer to
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
25
B/R
Fuel pump control
module (FPCM)
[When cranking engine]
0 - 0.5V
[Engine is running]
●
Warm-up condition
●
Idle speed
8 - 12V
41
GY
Fuel pump relay
[Ignition switch: ON]
●
For a few seconds after turning ignition switch
ON
[Engine is running]
0 - 1.0V
[Ignition switch: ON]
●
More than a few seconds after turning ignition
switch ON.
BATTERY VOLTAGE
(11 - 14V)
116
G/R
Fuel pump control
module (FPCM) check
[Engine is running]
●
More than a few seconds after turning ignition
switch ON
Approximately 0V
[Ignition switch ON]
●
For a few seconds after turning ignition switch
ON
[Engine is running]
●
Warm-up condition
●
Idle speed
4 - 6V
PBIB1118E
DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
EC-523
C
D
E
F
G
H
I
J
K
L
M
A
EC
2.
CHECK FPCM POWER SUPPLY CIRCUIT
1.
Disconnect fuel pump control module (FPCM) harness connector.
2.
Turn ignition switch ON.
3.
Check voltage between FPCM terminal 2 and ground with CON-
SULT-II or tester.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M141, B211
●
Harness connectors B62, B262
●
Harness for open or short between FPCM and harness connector B211
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK FPCM GROUND CIRCUIT-I FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Check harness continuity between FPCM terminal 3 and ground.
Refer to Wiring Diagram.
3.
Also check harness for short to power.
OK or NG
OK
>> GO TO 5.
NG
>> Repair open circuit or short to power in harness or connectors.
Voltage: Battery voltage
PBIB1129E
PBIB0099E
Continuity should exist.
EC-524
DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
5.
CHECK FPCM GROUND CIRCUIT-II FOR OPEN AND SHORT
1.
Disconnect “fuel level sensor unit and fuel pump” harness con-
nector.
2.
Disconnect dropping resistor harness connector.
3.
Check harness continuity between the following;
“fuel level sensor unit and fuel pump” terminal 1 and dropping
resistor terminal 2,
FPCM terminal 4 and dropping resister terminal 2.
Refer to Wiring Diagram.
4.
Check harness continuity between the following;
FPCM terminal 4 and ground,
“fuel level sensor and fuel pump” terminal 1 and ground.
Refer to Wiring Diagram.
5.
Also check harness for short to power.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 6.
6.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors B62, B262
●
Harness for open or short between “fuel level sensor unit and fuel pump” and dropping resistor
●
Harness for open or short between FPCM and dropping resistor
●
Harness for open or short between “fuel level sensor unit and fuel pump” and ground
●
Harness for open or short between FPCM and ground
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.
CHECK FPCM INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Disconnect ECM harness connector.
2.
Check harness continuity between ECM terminal 116 and FPCM terminal 4.
Refer to Wiring Diagram.
3.
Check harness continuity between ECM terminal 116 and ground.
Refer to Wiring Diagram.
4.
Also check harness for short to power.
OK or NG
OK
>> GO TO 9.
NG
>> GO TO 8.
Continuity should exist.
Continuity should not exist.
PBIB1127E
Continuity should exist.
Continuity should not exist.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст