2004 INFINITI FX35 Lock

INTELLIGENT KEY SYSTEM
BL-131
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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-132
INTELLIGENT KEY SYSTEM
Revision: 2004 November 2004 FX35/FX45
3. UNLOCK SENSOR GROUND CIRCUIT INSPECTION
Check continuity between front door lock assembly (driver side) connector D10 terminal 5 (B) and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
4. INTELLIGENT KEY UNIT OUTPUT SIGNAL INSPECTION
1. Connect Intelligent Key unit connector.
2. Driver side door lock is locked.
3. Check voltage between Intelligent Key unit connector M34 terminal 28 (W/B) and ground.
OK or NG
OK >> Replace front door lock assembly (driver side)
NG >> Replace Intelligent Key unit.
Check Door Request SwitchAIS004NH
1. DOOR REQUEST SWITCH INSPECTION
With CONSULT-II
Display “DR REQ SW” (driver door), “AS REQ SW” (passenger door) and “BD/TR REQ SW” (back door) on
DATA MONITOR screen, and check if ON-OFF display is linked to door request switch operation.
OK or NG
OK >> Door request switch is OK.
NG >> GO TO 2.5 (B) – Ground : Continuity should exist.
PIIA6804E
28 (W/B) – Ground : Approx. 5V
PIIA6802E
Press door request switch. : ON
Release door request switch. : OFF

INTELLIGENT KEY SYSTEM
BL-133
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Revision: 2004 November 2004 FX35/FX45
2. DOOR REQUEST SWITCH SIGNAL INSPECTION
1. Turn ignition knob LOCK position.
2. Disconnect door request switch connector.
3. Check voltage between door request switch connector D12 (driver door), D42 (passenger door), D113
(back door) terminal 1 and ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 5.
3. DOOR REQUEST SWITCH OPERATION INSPECTION
Check continuity between door request switch D12 (driver door), D42 (passenger door), D113 (back door) ter-
minals 1 and 2.
OK or NG
OK >> GO TO 4.
NG >> Replace door request switch.
4. DOOR REQUEST SWITCH GROUND CIRCUIT INSPECTION
Check continuity between door request switch connector D12 (driver side), D42 (passenger side), D113 (back
door) terminal 2 (B) and ground.
OK or NG
OK >> Check harness connection.
NG >> Repair or replace door request switch ground circuit.Driver 1 (SB) - Ground : Approx. 5V
Passenger 1 (GY) - Ground : Approx. 5V
Back door 1 (GY) - Ground : Approx. 5V
PIIA6744E
1 - 2
Press door request
switch.: Continuity should exist.
Return door request
switch.: Continuity should not exist.
PIIA9930E
2 (B) - Ground : Continuity should exist.
PIIA6746E

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-139
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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

BL-140
INTELLIGENT KEY SYSTEM
Revision: 2004 November 2004 FX35/FX45
2. STEERING LOCK UNIT GROUND CIRCUIT INSPECTION
Check continuity between steering lock unit connector M26 terminal 4 (Y/B) and ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 4.
3. STEERING LOCK COMMUNICATION CIRCUIT INSPECTION
1. Connect steering lock unit connector.
2. Check voltage between Intelligent Key unit connector M34 terminal 1 (R/W) and ground.
3. Immediately after pushing ignition knob, use an oscilloscope to check voltage waveform between Intelli-
gent Key unit connector M34 terminal 32 (R/B) and ground.
OK or NG
OK >> GO TO 4.
NG >> Replace Intelligent Key unit.4 (Y/B) - Ground : Continuity should exist.
PIIA6798E
1 (R/W) - Ground : Approx. 5V
MIIB0385E
Immediately after ignition knob pushing.
32 (R/B) - Ground
MIIB0386E
SIIA1911J

INTELLIGENT KEY SYSTEM
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Revision: 2004 November 2004 FX35/FX45
4. STEERING LOCK UNIT COMMUNICATION CIRCUIT INSPECTION
1. Disconnect Intelligent Key unit and steering lock unit connectors.
2. Check continuity between Intelligent Key unit connector M34 terminals 1, 31, 32 and steering lock unit
connector M26 terminals 2, 3, 4.
3. Check continuity between steering lock unit connector M26 ter-
minals 2, 3, 4 and ground.
OK or NG
OK >> Replace steering lock unit.

After replacing steering lock unit, perform registration procedure. Refer to “CONSULT-II Opera-
tion Manual NATS-IVIS/NVIS”.
NG >> Repair or replace harness between steering lock unit and Intelligent Key unit.
Check Stop Lamp SwitchAIS004NM
1. STOP LAMP SWITCH POWER SUPPLY CIRCUIT INSPECTION
1. Disconnect stop lamp switch connector.
2. Check voltage between stop lamp switch connector E210 termi-
nal 1 (GY) and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness between stop lamp switch
and fuse.
2. STOP LAMP SWITCH OPERATION INSPECTION
Check continuity between stop lamp switch connector E210 terminal
1 and 2.
OK or NG
OK >> GO TO 3.
NG >> Replace stop lamp switch.1 (R/W) - 2 (R/W) : Continuity should exist.
31 (Y/B) - 4 (Y/B) : Continuity should exist.
32 (R/B) - 3 (R/B) : Continuity should exist.
2 (R/W) - Ground : Continuity should not exist.
3 (R/B) - Ground : Continuity should not exist.
4 (Y/B) - Ground : Continuity should not exist.
PIIA6799E
1 (GY) - Ground : Battery voltage
PIIA6811E
1 - 2
Brake pedal depressed : Continuity should exist.
Brake pedal not
depressed: Continuity should not exist.
PIIA6800E

BL-142
INTELLIGENT KEY SYSTEM
Revision: 2004 November 2004 FX35/FX45
3. STOP LAMP SWITCH GROUND CIRCUIT INSPECTION
1. Check continuity between stop lamp switch connector E210 ter-
minal 2 (P) and Intelligent Key unit connector M34 terminal 26
(P/L).
2. Check continuity between stop lamp switch connector E210 ter-
minal 2 (P) and ground.
OK or NG
OK >> Stop lamp switch is OK.
NG >> Repair or replace harness.
Check Detention SwitchAIS004NN
1. DETENTION SWITCH INPUT SIGNAL INSPECTION
1. Turn ignition knob LOCK position.
2. Check voltage between Intelligent Key unit connector and ground.
OK or NG
OK >> Door switch circuit is OK.
NG >> GO TO 2.2 (P) - 26 (P/L) : Continuity should exist.
2 (P) - Ground : Continuity should not exist.
PIIA6801E
ConnectorTerminal
(Wire color)
ConditionVoltage (V)
(Approx.)
(+) (-)
M34 39 (R/Y) GroundWhen selector lever is locked
at the “P” position0
When selector lever is not
locked at the “P” positionBattery voltage
PIIA6805E