Infiniti Q45. Manual - part 524

IGNITION SIGNAL

EC-735

C

D

E

F

G

H

I

J

K

L

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.)

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

65
79
80
81

G/R
PU/W
W/R
W/G

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

EC-736

IGNITION SIGNAL

TBWM0582E

IGNITION SIGNAL

EC-737

C

D

E

F

G

H

I

J

K

L

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

NBS00271

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 13.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

46
60
61
62

L/R
GY/R
GY
Y/R

Ignition signal No. 7
Ignition signal No. 5
Ignition signal No. 3
Ignition signal No. 1

[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-738

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 13.

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-146, "POWER SUPPLY AND GROUND CIR-

CUIT"

 .

PBIB1549E

PBIB0044E

Voltage: Battery voltage

MBIB0034E