Infiniti Q45. Manual — part 516
ELECTRICAL LOAD SIGNAL
EC-703
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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
LT-36, "HEADLAMP (FOR CANADA) - DAYTIME
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
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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
.
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
Continuity should exist.
ELECTRICAL LOAD SIGNAL
EC-705
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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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