bcm INFINITI FX35 2004 Service Manual

LT-24
HEADLAMP - XENON TYPE -
Revision: 2004 November 2004 FX35/FX45
3. CHECK IPDM E/R
1. Select “IPDM E/R” on CONSULT-II. and select “DATA MONI-
TOR” on “SELECT DIAG MODE” screen.
2. Make sure “HL LO REQ” and “HL HI REQ” turns ON when light-
ing switch is in HIGH BEAM position.
OK or NG
OK >> Replace IPDM E/R.
NG >> Replace BCM. Refer to BCS-15, "
Removal and Installa-
tion of BCM" .
4. CHECK HEADLAMP INPUT SIGNAL
With CONSULT-II
1. Turn ignition switch OFF.
2. Disconnect front combination lamp RH and LH connector.
3. Select “IPDM E/R” on CONSULT-II. and select “ACTIVE TEST”
on “SELECT DIAG MODE” screen.
4. Select “LAMPS” on “SELECT TEST ITEM” screen.
5. Touch “HI” screen.
6. When headlamp high beam is operating, check voltage between
front combination lamp RH and LH harness connector and
ground (Headlamp high beam repeats ON–OFF every 1 sec-
ond).
Without CONSULT-II
1. Turn ignition switch OFF.
2. Disconnect front combination lamp RH and LH connector.
3. Start auto active test. Refer to PG-24, "
Auto Active Test" .
4. When headlamp high beam is operating, check voltage between front combination lamp RH and LH har-
ness connector and ground.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.When lighting switch is
HIGH BEAM position: HL LO REQ ON
: HL HI REQ ON
SKIA5775E
Terminals
Voltage (+)
(-)
Connector Terminal (Wire color)
RH E24 5 (BR)
Ground Battery voltage
LH E44 5 (SB)
PKIA5205E

LT-26
HEADLAMP - XENON TYPE -
Revision: 2004 November 2004 FX35/FX45
2. CHECK HEADLAMP CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between IPDM E/R harness connector E7 ter-
minal 27 (BR) and front combination lamp RH harness connec-
tor E24 terminal 5 (BR).
4. Check continuity between IPDM E/R harness connector E7 ter-
minal 28 (SB) and front combination lamp LH harness connector
E44 terminal 5 (SB).
OK or NG
OK >> Replace IPDM E/R.
NG >> Repair harness or connector.
3. CHECK HEADLAMP GROUND
1. Check continuity between front combination lamp RH harness
connector E24 terminal 7 (B) and ground.
2. Check continuity between front combination lamp LH harness
connector E44 terminal 7 (B) and ground.
OK or NG
OK >> Replace headlamp assembly.
NG >> Repair harness or connector.
High Beam Indicator Lamp Does Not IlluminateAKS007MN
1. CHECK BULB
Check bulb of high beam indicator lamp.
OK or NG
OK >> Replace combination meter.
NG >> Replace indicator bulb.
Headlamp Low Beam Does Not Illuminate (Both Sides)AKS007MO
1. CHECK COMBINATION SWITCH INPUT SIGNAL
With CONSULT-II
Select “BCM” on CONSULT-II. With “HEAD LAMP” data monitor,
make sure “HEAD LAMP SW 1” and “HEAD LAMP SW 2” turns ON-
OFF linked with operation of lighting switch.
Without CONSULT-II
Refer to LT- 11 3 , "
Combination Switch Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Check lighting switch. Refer to LT- 11 3 , "
Combination
Switch Inspection" . 27 (BR) – 5 (BR) : Continuity should exist.
28 (SB) – 5 (SB) : Continuity should exist.
PKIA5206E
7 (B) – Ground : Continuity should exist.
7 (B) – Ground : Continuity should exist.
PKIA5207E
When lighting switch is 2ND
position: HEAD LAMP SW 1 ON
: HEAD LAMP SW 2 ON
SKIA4194E

HEADLAMP - XENON TYPE -
LT-27
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Revision: 2004 November 2004 FX35/FX45
2. HEADLAMP ACTIVE TEST
With CONSULT-II
1. Select “IPDM E/R” on CONSULT-II. and select “ACTIVE TEST”
on “SELECT DIAG MODE” screen.
2. Select “LAMPS” on “SELECT TEST” ITEM screen.
3. Touch “LO” screen.
4. Make sure headlamp low beam operates.
Without CONSULT-II
1. Start auto active test. Refer to PG-24, "
Auto Active Test" .
2. Make sure headlamp low beam operates.
OK or NG
OK >> GO TO 3.
NG >> GO TO 4.
3. CHECK IPDM E/R
1. Select “IPDM E/R” on CONSULT-II. and select “DATA MONI-
TOR” on “SELECT DIAG MODE” screen.
2. Make sure “HL LO REQ” turns ON when lighting switch is in
2ND position.
OK or NG
OK >> Replace IPDM E/R.
NG >> Replace BCM. Refer to BCS-15, "
Removal and Installa-
tion of BCM" . Headlamp low beam should operate.
Headlamp low beam should operate.
SKIA5774E
When lighting switch is 2ND
position: HL LO REQ ON
SKIA5780E

LT-32
HEADLAMP - XENON TYPE -
Revision: 2004 November 2004 FX35/FX45
2. CHECK COMBINATION SWITCH INPUT SIGNAL
Select “BCM” on CONSULT-II. With “HEAD LAMP” data monitor,
make sure “HEAD LAMP SW 1” and “HEAD LAMP SW 2” turns ON-
OFF linked with operation of lighting switch.
OK or NG
OK >> Replace IPDM E/R.
NG >> Check lighting switch. Refer to LT- 11 3 , "
Combination
Switch Inspection" .
3. CHECKING CAN COMMUNICATIONS BETWEEN BCM AND IPDM E/R
Select “BCM” on CONSULT-II, and perform self-diagnosis for “BCM”.
Display of self-diagnosis results
NO DTC>> Replace IPDM E/R.
CAN COMM CIRCUIT>> Refer to BCS-14, "
CAN Communication
Inspection Using CONSULT-II (Self-Diagnosis)" . When lighting switch is OFF
position: HEAD LAMP SW 1 OFF
: HEAD LAMP SW 2 OFF
SKIA5200E
SKIA1039E

LT-38
DAYTIME LIGHT SYSTEM
Revision: 2004 November 2004 FX35/FX45
DAYTIME LIGHT SYSTEMPFP:284B2
Component Parts and Harness Connector LocationAKS007MZ
System DescriptionAKS007N0
DAYTIME LIGHT SYSTEM turns on Daytime Light Lamps while driving. Day Light Lamps are not turned on if
engine is activated with Parking Brake on. Take off Parking Brake to turn on Daytime Light Lamps. The lamps
turn off when Lighting Switch is in the 2ND position or AUTO position (Head Lamp is “ON”) and when Lighting
Switch is in the PASSING position. (Daytime Light Lamps are not turned off only by Parking Brake itself.)
An parking brake signal and engine run or stop signal are sent to BCM (body control module) by CAN commu-
nication line, and control daytime light system.
OUTLINE
Power is supplied at all times

through 10A fuse [No. 19, located in fuse block (J/B)]

to combination meter terminal 8

through 15A fuse [No. 22, located in fuse block (J/B)]

to BCM (body control module) terminal 42

through 50A fusible link (letter M, located in fuse and fusible link block)

to BCM (body control module) terminal 55

through 10A fuse [No. 36, located in fuse and fusible link block]

to daytime light relay terminals 2 and 5.
When the ignition switch is in ON or START position, power is supplied

through 10A fuse [No. 14, located in fuse block (J/B)]

to combination meter terminal 7

through 15A fuse [No. 1, located in fuse block (J/B)]

to BCM (body control module) terminal 38.
Ground is supplied

to combination meter terminals 5, 6 and 15
PKIA6522E

DAYTIME LIGHT SYSTEM
LT-39
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Revision: 2004 November 2004 FX35/FX45

through grounds M35, M45 and M85

to BCM (body control module) terminals 49 and 52

through grounds M35, M45 and M85.
DAYTIME LIGHT OPERATION
With the engine running, the lighting switch in the OFF or 1ST position and parking brake released, power is
supplied

through daytime light relay terminal 1

to combination meter terminal 10

through daytime light relay terminal 3

to clearance lamp RH and LH terminal 1.
Ground is supplied

to combination meter terminals 5, 6 and 15

through grounds M35, M45 and M85

to clearance lamp RH and LH terminal 3

through grounds E21, E50 and E51.
With power and grounds supplied, the front fog lamps illuminate.
COMBINATION SWITCH READING FUNCTION
Refer to BCS-3, "COMBINATION SWITCH READING FUNCTION" .
AUTO LIGHT OPERATION
For auto light operation, refer to LT- 5 4 , "System Description" in “AUTO LIGHT SYSTEM”.
CAN Communication System DescriptionAKS007N1
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN Communication UnitAKS0080T
Refer to LAN-6, "CAN Communication Unit" .

DAYTIME LIGHT SYSTEM
LT-45
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Revision: 2004 November 2004 FX35/FX45
Terminals and Reference Values for BCMAKS007XM
Te r m i n a l
No.Wire
colorSignal nameMeasuring condition
Reference value
Ignition
switchOperation or condition
2 GY Combination switch input 5 ONLighting, turn, wiper OFF
Wiper dial position 4
3 L/B Combination switch input 4 ONLighting, turn, wiper OFF
Wiper dial position 4
4 PU/W Combination switch input 3 ONLighting, turn, wiper OFF
Wiper dial position 4
5 Y/R Combination switch input 2
ONLighting, turn, wiper OFF
Wiper dial position 4
6 SB Combination switch input 1
32 GY/R Combination switch output 5 ONLighting, turn, wiper OFF
Wiper dial position 4
33 G Combination switch output 4 ONLighting, turn, wiper OFF
Wiper dial position 4
34 W/B Combination switch output 3 ONLighting, turn, wiper OFF
Wiper dial position 4
SKIA5291E
SKIA5292E
SKIA5291E
SKIA5292E
SKIA5291E
SKIA5292E
SKIA5291E

LT-46
DAYTIME LIGHT SYSTEM
Revision: 2004 November 2004 FX35/FX45
How to Proceed With Trouble DiagnosisAKS007N6
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT- 3 8 , "
System Description" .
3. Perform the Preliminary Check. Refer to LT- 4 6 , "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does the headlamp operate normally? If YES: GO TO 6. If NO: GO TO 4.
6. INSPECTION END
Preliminary CheckAKS007N7
CHECK POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSES

Check fuses for blown-out.
Refer to LT- 4 1 , "Wiring Diagram — DTRL —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-
3, "POWER SUPPLY ROUTING CIRCUIT" .
35 W/G Combination switch output 2
ONLighting, turn, wiper OFF
Wiper dial position 4
36 W/R Combination switch output 1
38 W/L Ignition switch (ON) ON — Battery voltage
39 L CAN− H—— —
40 R CAN− L—— —
42 L/R Battery power supply OFF — Battery voltage
49 B Ground ON — Approx. 0V
52 B Ground ON — Approx. 0V
55 G Battery power supply OFF — Battery voltage Terminal
No.Wire
colorSignal nameMeasuring condition
Reference value
Ignition
switchOperation or condition
SKIA5292E
Unit Power source Fuse and fusible link No.
BCMBatteryM
22
Ignition switch ON or START position 1
Daytime light relay Battery 36

DAYTIME LIGHT SYSTEM
LT-47
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Revision: 2004 November 2004 FX35/FX45
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check voltage between BCM harness connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open or short between BCM and
fuse.
3. CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
OK or NG
OK >> INSPECTION END
NG >> Check ground circuit harness.
INSPECTION PARKING BRAKE SWITCH CIRCUIT
1. CHECK BRAKE INDICATOR
1. Turn ignition switch ON
2. When parking brake is made ON/OFF, it checks whether the brake indicator lamp of combination meter
lights up/puts out the light.
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.
Terminals Ignition switch position
(+)
(-) OFF ON
Connector Terminal (Wire color)
M3 38 (W/L)
Ground0V Battery voltage
M442 (L/R) Battery voltage Battery voltage
55 (G) Battery voltage Battery voltage
SKIA7095E
Terminals
Continuity
Connector Terminal (Wire color)
M449 (B)
Ground Yes
52 (B)
PKIA5191E

LT-48
DAYTIME LIGHT SYSTEM
Revision: 2004 November 2004 FX35/FX45
2. CHECK PARKING BRAKE SWITCH SIGNAL
1. Turn ignition switch OFF.
2. Disconnect parking brake switch connector.
3. Turn ignition switch ON.
4. Check voltage between parking brake switch harness connector
E207 terminal 1 (L) and ground.
OK or NG
OK >> Replace parking brake switch.
NG >> GO TO 3.
3. CHECK PARKING BRAKE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter connector.
3. Check continuity between combination meter harness connector
M20 terminal 23 (PU/W) and parking brake switch harness con-
nector E207 terminal 1 (L).
OK or NG
OK >> Replace combination meter.
NG >> Repair harness or connector.
CONSULT-II Functions AKS007N8

CONSULT-II executes the following functions by combining data reception and command transmission via
the communication line from BCM. Work support, self-diagnosis, data monitor, and active test display.
CONSULT-II BASIC OPERATION
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
1. With the ignition switch OFF, connect CONSULT-II and CON-
SULT-II CONVERTER to the data link connector, then turn igni-
tion switch ON.1 (L) – Ground : Battery voltage should exist.
SKIA5876E
1 (L) – 23 (PU/W) : Continuity should exist.
SKIA5877E
BCM diagnosis part Check item, diagnosis mode Description
HEADLAMPDATA MONITOR Displays BCM input data in real time.
ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
BCM CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
PBIB1503E