Infiniti Q45. Manual - part 516

 

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Infiniti Q45. Manual - part 516

 

 

ELECTRICAL LOAD SIGNAL

EC-703

C

D

E

F

G

H

I

J

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M

A

EC

6. 

CHECK HEATER FAN SIGNAL CIRCUIT OVERALL FUNCTION

 With CONSULT-II

Check “HEATER FAN SW” in “DATA MONITOR” mode with CON-
SULT-II under the following conditions.

OK or NG

OK

>> INSPECTION END.

NG

>> GO TO 14.

7. 

CHECK HEATER FAN SIGNAL CIRCUIT OVERALL FUNCTION

 Without CONSULT-II

Check voltage between ECM terminal 96 and ground under the fol-
lowing conditions.

OK or NG

OK

>> INSPECTION END.

NG

>> GO TO 14.

8. 

CHECK HEADLAMP FUNCTION

1.

Start engine.

2.

Turn the lighting switch ON at 2nd position.

3.

Check that headlamps are illuminated.

OK or NG

OK

>> GO TO 9.

NG

>> Refer to 

LT-5, "HEADLAMP (FOR USA)"

    or 

LT-36, "HEADLAMP (FOR CANADA) - DAYTIME

LIGHT SYSTEM -"

 .

9. 

CHECK HEADLAMP INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT

1.

Stop engine.

2.

Disconnect ECM harness connector.

3.

Disconnect headlamp relay-1 harness connector.

4.

Check harness continuity between headlamp relay-1 terminal 5 and ECM terminal 84.
Refer to Wiring Diagram.

5.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 16.

NG

>> GO TO 10.

Condition

LOAD SIGNAL

Heater fan control switch: ON

ON

Heater fan control switch: OFF

OFF

PBIB1995E

Condition

Voltage

Heater fan control switch: ON

0V

heater fan control switch: OFF

BATTERY VOLTAGE

PBIB1219E

Continuity should exist.

EC-704

ELECTRICAL LOAD SIGNAL

10. 

DETECT MALFUNCTIONING PART

Check the following.

Fuse, fusible link and relay block (J/B) connector E3

Harness connectors E34, F34

Harness for open and short between headlamp relay-1 and ECM

>> Repair open circuit or short to ground or short to power in harness or connectors.

11. 

CHECK REAR WINDOW DEFOGGER FUNCTION

1.

Start engine.

2.

Turn ON the rear window defogger switch.

3.

Check the rear windshield. Is the rear windshield heated up?

Yes or No

Yes

>> GO TO 12.

No

>> Refer to 

GW-61, "REAR WINDOW DEFOGGER"

 .

12. 

CHECK REAR WINDOW DEFOGGER INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT

1.

Stop engine.

2.

Disconnect ECM harness connector.

3.

Disconnect rear window defogger relay.

4.

Check harness continuity between rear window defogger relay terminals 5, 7 and ECM terminal 93.
Refer to Wiring Diagram.

5.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 16.

NG

>> GO TO 13.

13. 

DETECT MALFUNCTIONING PART

Check the following.

Harness connectors B5, M5

Harness connectors M135, F105

Harness for open and short between rear window defogger relay and ECM

>> Repair open circuit or short to ground or short to power in harness or connectors.

14. 

CHECK HEATER FAN CONTROL FUNCTION

1.

Start engine.

2.

Turn ON the fan control switch.

3.

Check the blower fan motor. Does the blower fan motor activate?

Yes or No

Yes

>> GO TO 15.

No

>> Refer to 

ATC-35, "TROUBLE DIAGNOSIS"

 .

Continuity should exist.

ELECTRICAL LOAD SIGNAL

EC-705

C

D

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F

G

H

I

J

K

L

M

A

EC

15. 

CHECK HEATER FAN SIGNAL CIRCUIT FOR OPEN OR SHORT

1.

Stop engine.

2.

Disconnect ECM harness connector.

3.

Disconnect A/C AUTO AMP. harness connector.

4.

Check harness continuity between A/C AUTO AMP. terminal 29 and ECM terminal 96.
Refer to Wiring Diagram.

5.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 16.

NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

16. 

CHECK INTERMITTENT INCIDENT

Perform 

EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Continuity should exist.

EC-706

FUEL INJECTOR

FUEL INJECTOR

PFP:16600

Component Description

NBS00274

The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the fuel injector circuit, the coil in the fuel injec-
tor is energized. The energized coil pulls the ball valve back and
allows fuel to flow through the fuel injector into the intake manifold.
The amount of fuel injected depends upon the injection pulse dura-
tion. Pulse duration is the length of time the fuel injector remains
open. The ECM controls the injection pulse duration based on
engine fuel needs.

CONSULT-II Reference Value in Data Monitor Mode

NBS00275

Specification data are reference values.

SEF375Z

MONITOR ITEM

CONDITION

SPECIFICATION

B/FUEL SCHDL

See 

EC-135, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"

  .

INJ PULSE-B1
INJ PULSE-B2

Engine: After warming up

Selector lever: P or N

Air conditioner switch: OFF

No load

Idle

2.0 - 3.0 msec

2,000 rpm

1.9 - 2.9 msec

 

 

 

 

 

 

 

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