2004 INFINITI FX35 Power supply

INTELLIGENT KEY SYSTEM
BL-125
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MA
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Revision: 2004 November 2004 FX35/FX45
2. KEY SWITCH POWER SUPPLY CIRCUIT INSPECTION
1. Remove mechanical key from ignition knob.
2. Disconnect key switch and ignition knob switch connector.
3. Check voltage between key switch and ignition knob switch connector M22 terminal 3 (L/R) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace key switch power supply circuit.
3. KEY SWITCH OPERATION INSPECTION
Check continuity between key switch and ignition knob switch terminals 3 and 4.
OK or NG
OK >> GO TO 4.
NG >> Replace key switch.
4. KEY SWITCH CIRCUIT INSPECTION
1. Disconnect Intelligent Key unit connector.
2. Check continuity between Intelligent Key unit connector M34 terminal 7 (B/W) and key switch and ignition
knob switch connector M22 terminal 4 (B/W).
3. Check continuity between key switch and ignition knob switch
connector M22 terminal 4 (B/W) and ground.
OK or NG
OK >> Replace Intelligent key unit.
NG >> Repair or replace harness between Intelligent Key unit
and key switch and ignition knob switch. 3 (L/R) - Ground : Battery voltage
PIIA6738E
Terminals Condition Continuity
3 – 4Key is inserted in ignition key cylinder. Yes
Key is removed from ignition key cylinder. No
PIIA6140E
7 (B/W) - 4 (B/W) : Continuity should exist.
4 (B/W) - Ground : Continuity should not exist.
PIIA6740E

BL-126
INTELLIGENT KEY SYSTEM
Revision: 2004 November 2004 FX35/FX45
Check Key Switch (BCM Input)AIS004ND
1. KEY SWITCH POWER SUPPLY CIRCUIT INSPECTION
1. Turn ignition knob OFF position.
2. Disconnect key switch and ignition knob switch connector.
3. Check voltage between key switch and ignition knob switch con-
nector M22 terminal 3 (L/R) and ground.
OK or NG
OK >> GO TO 2.
NG >> Check harness between key switch and ignition knob
switch and fuse.
2. KEY SWITCH INSPECTION
Check continuity between key switch and ignition knob switch as fol-
lows.
OK or NG
OK >> GO TO 3.
NG >> Replace key switch and ignition knob switch.
3. KEY SWITCH SIGNAL CIRCUIT INSPECTION
1. Disconnect key switch and ignition knob switch connector and
BCM connector.
2. Check continuity between key switch and ignition knob switch
connector M22 terminal 4 (B/W) and BCM connector M3 termi-
nal 37 (B/W).
3. Check continuity between key switch and ignition knob switch
connector M22 terminal 4 (B/W) and ground.
OK or NG
OK >> Key switch (BCM input) circuit is OK.
NG >> Repair or replace harness between key switch and ignition knob switch and BCM.3 (L/R) – Ground : Battery voltage.
PIIA5093E
Terminals Condition Continuity
3 – 4Key is inserted in ignition key cylinder. Yes
Key is removed from ignition key cylinder. No
PIIA6140E
4 (B/W) – 37 (B/W) : Continuity should exist.
4 (B/W) – Ground : Continuity should not exist.
PIIA5095E

INTELLIGENT KEY SYSTEM
BL-127
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BL
Revision: 2004 November 2004 FX35/FX45
Check Ignition Knob SwitchAIS004NE
1. IGNITION KNOB SWITCH INSPECTION
With CONSULT-II
Display “PUSH SW” on DATA MONITOR screen, and check if ON/OFF display is linked to ignition knob oper-
ation.
OK or NG
OK >> Ignition knob switch is OK.
NG >> GO TO 2.
2. IGNITION KNOB SWITCH POWER SUPPLY CIRCUIT INSPECTION
1. Turn ignition knob LOCK position.
2. Disconnect key switch and ignition knob switch connector.
3. Check voltage between key switch and ignition knob switch connector M22 terminal 1 (L/R) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace key switch and ignition knob switch
power supply circuit.
3. IGNITION KNOB SWITCH OPERATION INSPECTION
Check continuity between key switch and ignition knob switch terminals 1 and 2.
OK or NG
OK >> GO TO 4.
NG >> Replace key switch and ignition knob switch.Press ignition knob. : ON
Return ignition knob (release hands
from ignition knob): OFF
1 (L/R) - Ground : Battery voltage
PIIA6741E
Press ignition knob. : Continuity should exist.
Return ignition knob
(release hands from
ignition knob).: Continuity should not exist.
PIIA9929E

INTELLIGENT KEY SYSTEM
BL-131
C
D
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H
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MA
B
BL
Revision: 2004 November 2004 FX35/FX45
5. CHECK BCM OUTPUT SIGNAL
1. Connect BCM connector.
2. Check voltage between BCM connector and ground.
OK or NG
OK >> Check condition of harness and connector.
NG >> Replace BCM.
Check Unlock SensorAIS004NG
1. UNLOCK SENSOR POWER SUPPLY INSPECTION
Check voltage between Intelligent Key unit connector and ground.
OK or NG
OK >> Unlock sensor is OK.
NG >> GO TO 2.
2. UNLOCK SENSOR CIRCUIT INSPECTION
1. Turn ignition knob LOCK position.
2. Disconnect Intelligent Key unit and front door lock assembly (driver side) connector.
3. Check continuity between Intelligent Key unit connector M34 terminal 28 (W/B) and front door lock
assembly (driver side) connector D10 terminal 4 (W).
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness between Intelligent Key unit
and front door lock assembly (driver side). 58 (L) – Ground : Approx. 9V
PIIA6229E
ConnectorTerminals (Wire color)
ConditionVoltage (V)
(Approx.)
(+) (-)
M34 28 (W/B) GroundDriver side door lock is
locked5
Driver side door lock is
unlocked0
PIIA6802E
28 (W/B) – 4 (W) : Continuity should exist.
PIIA6803E

BL-134
INTELLIGENT KEY SYSTEM
Revision: 2004 November 2004 FX35/FX45
5. DOOR REQUEST SWITCH CIRCUIT INSPECTION
1. Disconnect Intelligent Key unit connector.
2. Check continuity between Intelligent Key unit connector M34 terminals 5 (driver door), 25 (passenger
door), and 29 (back door) and door request switch connector D12 (driver door), D42 (passenger door),
D113 (back door) terminal 1.
3. Check continuity between door request switch connector D12
(driver door), D42 (passenger door), D113 (back door) terminal
1 and ground.
OK or NG
OK >> Replace Intelligent Key unit.
NG >> Repair or replace harness between Intelligent Key unit and door request switch.
Check Intelligent Key Warning BuzzerAIS004NI
1. INTELLIGENT KEY WARNING BUZZER POWER SUPPLY CIRCUIT INSPECTION
1. Turn ignition knob LOCK position.
2. Disconnect Intelligent Key warning buzzer connector.
3. Check voltage between Intelligent Key warning buzzer connector D11 (driver side), D41 (passenger side)
terminal 1 (L) and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace Intelligent Key warning buzzer power
supply circuit.
2. INTELLIGENT KEY WARNING BUZZER CIRCUIT INSPECTION
1. Disconnect Intelligent Key unit connector.
2. Check continuity between Intelligent Key unit connector M34 terminal 4 and Intelligent Key warning
buzzer connector D11 (driver side), D41 (passenger side) terminal 2 (G).
3. Check continuity between Intelligent Key warning buzzer con-
nector D11 (driver side), D41 (passenger side) terminal 2 (G)
and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness between Intelligent Key warn-
ing buzzer and Intelligent Key unit. Driver 5 (W/L) - 1 (SB) : Continuity should exist.
Passenger 25 (W/R) - 1 (GY) : Continuity should exist.
Back door 29 (GY) - 1 (GY) : Continuity should exist.
1 - Ground : Continuity should not exist.
PIIA6747E
1 (L) - Ground : Battery voltage
PIIA6748E
4 (LG) - 2 (G) : Continuity should exist.
2 (G) - Ground : Continuity should not exist.
PIIA6749E

INTELLIGENT KEY SYSTEM
BL-135
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BL
Revision: 2004 November 2004 FX35/FX45
3. INTELLIGENT KEY WARNING BUZZER OPERATION INSPECTION
Connect battery power supply to Intelligent Key warning buzzer connector D11 (driver side), D41 (passenger
side) terminals 1 and 2, and check the operation.
OK or NG
OK >> Intelligent Key warning buzzer is OK.
NG >> Replace Intelligent Key warning buzzer
Check Outside Key AntennaAIS004NJ
1. OUTSIDE KEY ANTENNA POWER SUPPLY INSPECTION
Push each door request switch, and use an oscilloscope to check voltage waveform of harness between Intel-
ligent Key unit connector M34 terminals 17 (back door), 19 (driver and rear LH door), and 37 (passenger and
rear RH door) and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.1 (BAT+) - 2 (BAT-) : the buzzer sounds
PIIA6750E
Terminal (Wire color)
ConditionSignal
(Reference value)
(+) (-)
Back door:
17 (OR/L)
GroundPush each
door request
switch Driver, rear LH:
19 (SB)
Passenger,
rear RH
37 (G)
MIIB0375ESIIA1910J

BL-138
INTELLIGENT KEY SYSTEM
Revision: 2004 November 2004 FX35/FX45
Check Inside Key AntennaAIS004NK
1. INSIDE KEY ANTENNA POWER SUPPLY CIRCUIT INSPECTION
Push ignition knob and use an oscilloscope to check voltage waveform between Intelligent Key unit connector
M34 terminals 13 (luggage room), 15 (dash board), 35 (dash board) and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. INSIDE KEY ANTENNA OPERATION INSPECTION
1. Disconnect inside key antenna connector.
2. Check continuity between inside key antenna connector M70, M153 (dash board), B68 (luggage room)
terminals 1 and 2.
OK or NG
OK >> GO TO 3.
NG >> Replace malfunctioning inside key antenna.
Terminal (Wire color)
ConditionSignal
(Reference value)
(+) (-)
Luggage room:
13 (Y)
GroundPush igni-
tion knob. Dash board:
15 (W/R)
35 (LG)
PIIA6753ESIIA1910J
1 - 2 : Continuity should exist.
PIIA9933E

INTELLIGENT KEY SYSTEM
BL-139
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: 2004 November 2004 FX35/FX45
3. INSIDE KEY ANTENNA INSPECTION
1. Disconnect Intelligent Key unit connector.
2. Check continuity between inside key antenna connector M70, M153 (dash board), B68 (luggage room)
terminals 1, 2 and Intelligent Key unit connector terminals 13, 14, 15, 16, 35 and 36.
3. Check continuity between inside key antenna connector M70, M153 (dash board), B68 (luggage room)
terminals 1 and 2 and ground.
OK or NG
OK >> Replace Intelligent Key unit.
NG >> Repair or replace harness between inside key antenna and Intelligent Key unit.
Check Steering Lock UnitAIS004NL
1. STEERING LOCK UNIT POWER SUPPLY INSPECTION
1. Turn ignition knob LOCK position.
2. Disconnect steering lock unit connector.
3. Check voltage between steering lock unit connector M26 terminal 1 (L/R) and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace steering lock unit power supply circuit.Inside key
antenna-3 (Lug-
gage room)1 (OR/L) - 13 (Y): Continuity should exist.
2 (W/L) - 14 (BR): Continuity should exist.
Inside key
antenna-1 (Dash
board)1 (W/R) - 15 (W/R): Continuity should exist.
2 (B/R) - 16 (B/R): Continuity should exist.
Inside key
antenna-2 (Dash
board)1 (LG) - 35 (LG): Continuity should exist.
2 (PU) - 36 (PU): Continuity should exist.
Inside key
antenna-3 (Lug-
gage room)1 (OR/L) - Ground: Continuity should not exist.
2 (W/L) - Ground: Continuity should not exist.
Inside key
antenna-1 (Dash
board)1 (W/R) - Ground: Continuity should not exist.
2 (B/R) - Ground: Continuity should not exist.
Inside key
antenna-2 (Dash
board)1 (LG) - Ground: Continuity should not exist.
2 (PU) - Ground: Continuity should not exist.
PIIA6755E
1 (L/R) - Ground : Battery voltage
PIIA6797E