Infiniti Q45. Manual - part 515

ELECTRICAL LOAD SIGNAL

EC-699

C

D

E

F

G

H

I

J

K

L

M

A

EC

Wiring Diagram

NBS0027L

TBWM1258E

EC-700

ELECTRICAL LOAD SIGNAL

TBWM0588E

ELECTRICAL LOAD SIGNAL

EC-701

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.

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

NBS0027M

1. 

INSPECTION START

Do you have CONSULT-II?

Yes or No

Yes

>> GO TO 2.

No

>> GO TO 3.

2. 

CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCITION-I

 With CONSULT-II

1.

Turn ignition switch ON.

2.

Check “LOAD SIGNAL” in “DATA MONITOR” mode with CON-
SULT-II under the following conditions.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 8.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

84

Y/B

Electrical load signal
(Headlamp switch)

[Ignition switch: ON]

●

Lighting switch: 2nd position

BATTERY VOLTAGE
(11 - 14V)

[Ignition switch: ON]

●

Lighting switch: OFF

Approximately 0V

93

L/R

Electrical load signal
(Rear window defogger 
switch)

[Ignition switch: ON]

●

Rear window defogger switch: ON

BATTERY VOLTAGE
(11 - 14V)

[Ignition switch: ON]

●

Rear window defogger switch: OFF

Approximately 0V

96

SB

Heater fan switch

[Engine is running]

●

Heater fan switch: ON

Approximately 0V

[Engine is running]

●

Heater fan switch: OFF

BATTERY VOLTAGE
(11 - 14V)

Condition

LOAD SIGNAL

Lighting switch: ON at 2nd position

ON

Lighting switch: OFF

OFF

PBIB0103E

EC-702

ELECTRICAL LOAD SIGNAL

3. 

CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I

 Without CONSULT-II

1.

Turn ignition switch ON.

2.

Check voltage between ECM terminal 84 and ground under the
following conditions.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 8.

4. 

CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II

 With CONSULT-II

Check “LOAD SIGNAL” in “DATA MONITOR” mode with CONSULT-
II under the following conditions.

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 11.

5. 

CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II

 Without CONSULT-II

Check voltage between ECM terminal 93 and ground under the fol-
lowing conditions.

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 11.

Condition

Voltage

Lighting switch: ON at 2nd position

BATTERY VOLTAGE

Lighting switch: OFF

0V

MBIB0158E

Condition

LOAD SIGNAL

Rear window defogger switch: ON

ON

Rear window defogger switch: OFF

OFF

PBIB0103E

Condition

Voltage

Rear window defogger switch: ON

BATTERY VOLTAGE

Rear window defogger switch: OFF

0V

PBIB1773E