2004 INFINITI FX35 ignition

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
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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

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

BL-144
INTELLIGENT KEY SYSTEM
Revision: 2004 November 2004 FX35/FX45
4. DETENTION SWITCH GROUND CIRCUIT INSPECTION
Check continuity between A/T device (detention switch) connector
M67 terminal 2 (B) and ground.
OK or NG
OK >> Check harness connection.
NG >> Repair or replace harness.
Check Select Unlock RelayAIS004NO
1. CHECK SELECT UNLOCK RELAY POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect passenger side select unlock relay connector.
3. Check voltage between passenger side select unlock relay con-
nector M30 terminal 1 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace passenger side select unlock relay power supply circuit.
2. CHECK HARNESS
1. Disconnect Intelligent Key unit connector.
2. Check continuity between passenger side select unlock relay
connector M30 terminal 2 and Intelligent Key unit connector
M34 terminal 40.
3. Check continuity between passenger side select unlock relay
connector M30 terminal 2 and ground.
OK or NG
OK >> Replace passenger side select unlock relay.
NG >> Repair or replace harness between passenger side select unlock relay and Intelligent Key unit.2 (B) – Ground : Continuity should exist.
PIIA6809E
1 (L/R) – Ground : Approx. 12V
PIIA6954E
2 (BR/W) – 40 (BR/W) : Continuity should exist.
2 (BR/W) – Ground : Continuity should not exist.
PIIA6955E

BL-146
INTELLIGENT KEY SYSTEM
Revision: 2004 November 2004 FX35/FX45
2. CHECK IPDM E/R HARNESS
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R and horn relay connector.
3. Check continuity between IPDM E/R connector E9 terminal 51 (SB) and horn relay connector E10 termi-
nal 1 (SB).
OK or NG
OK >> Check harness connection.
NG >> Repair or replace harness.
Removal and Installation of Intelligent Key UnitAIS004NT
REMOVAL
1. Remove the instrument lower driver panel. Refer to IP-11, "Removal and Installation" .
2. Disconnect the Intelligent Key unit connector, remove the screw
and Intelligent Key unit.
INSTALLATION
Install in the reverse order of removal.51 (SB) – 1 (SB) : Continuity should exist.
PIIA6404E
PIIA6371E

BACK DOOR AUTO CLOSURE SYSTEM
BL-171
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Revision: 2004 November 2004 FX35/FX45
Back Door Closure Control Unit Power Supply and Ground Circuit CheckAIS004OK
1. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Check voltage between back door closure control unit connector
D106 terminal 1 and ground.
OK or NG
OK >> GO TO 2.
NG >> Check the following.

15A fuse [No.18, located in fuse block (J/B)]

Harness for open or short between back door closure
control unit and fuse.
2. CHECK GROUND CIRCUIT
1. Disconnect back door closure control unit connector.
2. Check continuity between back door closure control unit con-
nector D106 terminal 4 and ground.
OK or NG
OK >> Power supply and ground circuit are OK.
NG >> Repair or replace harness.
Half-Latch Switch CheckAIS004OL
1. CHECK HALF-LATCH SWITCH SIGNAL
1. Turn ignition switch OFF.
2. Check the signal between back door closure control unit connector and ground with oscilloscope.
OK or NG
OK >> Half-latch switch is OK.
NG >> GO TO 2.1 (R) – Ground : Battery voltage
PIIA6166E
4 (B) – Ground : Continuity should exist.
PIIA6167E
Con-
nectorTerminals (Wire color)
Back door
conditionSignal
(Reference value)
(+) (-)
D106 7 (OR) GroundFully open →
fully closed
PIIA6168E
SIIA1479J

BACK DOOR AUTO CLOSURE SYSTEM
BL-173
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Revision: 2004 November 2004 FX35/FX45
Close Switch CheckAIS004OM
1. CHECK CLOSE SWITCH SIGNAL
1. Turn ignition switch OFF.
2. Check the signal between back door closure control unit connector and ground with oscilloscope.
OK or NG
OK >> Close switch is OK.
NG >> GO TO 2.
2. CHECK HARNESS CONTINUITY
1. Disconnect back door closure control unit and back door closure motor connector.
2. Check continuity between back door closure control unit con-
nector D106 terminal 8 and back door closure motor connector
D109 terminal 5.
3. Check continuity between back door closure control unit con-
nector D106 terminal 8 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK GROUND CIRCUIT
Check continuity between back door closure motor connector D109
terminal 8 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
Con-
nectorTerminals (Wire color)
Back door
conditionSignal
(Reference value)
(+) (-)
D106 8 (L) GroundFully open →
fully closed
PIIA6171E
SIIA1478J
8 (L) – 5 (L) : Continuity should exist.
8 (L) – Ground : Continuity should not exist.
PIIA6174E
8 (B) – Ground : Continuity should exist.
PIIA6170E