Infiniti M35/M45 Y50. Manual — part 736
IGNITION SIGNAL
EC-1417
[VK45DE]
C
D
E
F
G
H
I
J
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M
A
EC
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic Procedure
NBS005PS
1.
CHECK ENGINE START
Turn ignition switch OFF, and restart engine.
Is engine running?
Yes or No
Yes (With CONSULT-II)>>GO TO 2.
Yes (Without CONSULT-II)>>GO TO 3.
No
>> GO TO 4.
2.
CHECK OVERALL FUNCTION
With CONSULT-II
1.
Perform “POWER BALANCE” in “ACTIVE TEST” mode with
CONSULT-II.
2.
Make sure that each circuit produces a momentary engine
speed drop.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 10.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
65
79
80
81
BR/R
GR/R
GR/B
G/R
Ignition signal No. 8
Ignition signal No. 6
Ignition signal No. 4
Ignition signal No. 2
[Engine is running]
●
Warm-up condition
●
Idle speed
NOTE:
The pulse cycle changes depending on rpm
at idle
0 - 0.2V
[Engine is running]
●
Warm-up condition
●
Engine speed: 2,000 rpm
0.1 - 0.4V
PBIB0044E
PBIB0045E
PBIB0133E
EC-1418
[VK45DE]
IGNITION SIGNAL
3.
CHECK OVERALL FUNCTION
Without CONSULT-II
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
OK
>> INSPECTION END
NG
>> GO TO 10.
4.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I
1.
Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
2.
Check voltage between ECM terminals 119, 120 and ground
with CONSULT-II or tester.
OK or NG
OK
>> GO TO 5.
NG
>> Go to
EC-858, "POWER SUPPLY AND GROUND CIR-
.
PBIB1549E
PBIB0044E
Voltage: Battery voltage
MBIB0034E
IGNITION SIGNAL
EC-1419
[VK45DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
5.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-II
1.
Turn ignition switch OFF.
2.
Disconnect condenser (1) harness connector.
3.
Turn ignition switch ON.
4.
Check voltage between condenser terminal 1 and ground with
CONSULT-II or tester.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 6.
6.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-III
1.
Turn ignition switch OFF.
2.
Disconnect IPDM E/R harness connector E7.
3.
Check harness continuity between IPDM E/R terminal 17 and condenser terminal 1.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
EC-858, "POWER SUPPLY AND GROUND CIRCUIT"
NG
>> GO TO 7.
7.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors E12, F3
●
Harness for open or short between IPDM E/R and condenser
>> Repair open circuit or short to ground or short to power in harness or connectors.
PBIB2713E
Voltage: Battery voltage
PBIB0624E
Continuity should exist.
EC-1420
[VK45DE]
IGNITION SIGNAL
8.
CHECK CONDENSER GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Check harness continuity between condenser terminal 2 and ground.
Refer to Wiring Diagram.
3.
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
Refer to
EC-1421, "Component Inspection"
OK or NG
OK
>> GO TO 10.
NG
>> Replace condenser.
10.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-IV
1.
Turn ignition switch OFF.
2.
Reconnect all harness connectors disconnected.
3.
Disconnect ignition coil harness connector.
4.
Turn ignition switch ON.
5.
Check voltage between ignition coil terminal 3 and ground with
CONSULT-II or tester.
OK or NG
OK
>> GO TO 12.
NG
>> GO TO 11.
Continuity should exist.
: Vehicle front
1.
Ignition coil (with power transistor)
(bank 2)
2.
Ignition coil (with power transistor)
(bank 1)
Voltage: Battery voltage
PBIB2692E
PBIB0138E
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