2007 INFINITI M35 ecm

TROUBLE DIAGNOSIS
LAN-81
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Revision: 2007 April2007 M35/M45
Component Parts LocationNKS004G4
Harness LayoutNKS004G5
Refer to PG-62, "Harness Layout" .
1. AWD control unit F109 2. AFS control unit F110 3. IPDM E/R E9
4. BCM M1 5. NAVI control unit M210: With
navigation system
AV control unit M210: Without
navigation system6. Unified meter and A/C amp. M65
7. ICC sensor integrated unit E61 8. ABS actuator and electric unit
(control unit) E309. Intelligent Key unit M32
10. Data link connector M60 11. Low tire pressure warning con-
trol unit M1912. Driver seat control unit B204
13. Steering angle sensor M47 14. TCM F42 15. Pre-crash seat belt control unit
B142
16. RAS control unit B476 17. LDW camera unit M182 18. ECM M71
PKID0344E

LAN-82
[CAN]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
Malfunction Area ChartNKS004G6
MAIN LINE
BRANCH LINE
SHORT CIRCUIT
Malfunction Area Reference
Main line between TCM and data link connectorLAN-83, "
Main Line Between TCM and Data Link Connector"
Main line between data link connector and pre-crash seat belt
control unitLAN-84, "Main Line Between Data Link Connector and Pre-
crash Seat Belt Control Unit"
Main line between data link connector and RAS control unitLAN-85, "Main Line Between Data Link Connector and RAS
Control Unit"
Main line between RAS control unit and pre-crash seat belt con-
trol unitLAN-86, "Main Line Between RAS Control Unit and Pre-crash
Seat Belt Control Unit"
Main line between pre-crash seat belt control unit and driver
seat control unitLAN-87, "Main Line Between Pre-crash Seat Belt Control Unit
and Driver Seat Control Unit"
Main line between driver seat control unit and ABS actuator and
electric unit (control unit)LAN-88, "Main Line Between Driver Seat Control Unit and ABS
Actuator and Electric Unit (Control Unit)"
Main line between ABS actuator and electric unit (control unit)
and ICC sensor integrated unitLAN-89, "Main Line Between ABS Actuator and Electric Unit
(Control Unit) and ICC Sensor Integrated Unit"
Malfunction Area Reference
ECM branch line circuitLAN-89, "
ECM Branch Line Circuit"
AWD control unit branch line circuitLAN-90, "AWD Control Unit Branch Line Circuit"
AFS control unit branch line circuitLAN-91, "AFS Control Unit Branch Line Circuit"
BCM branch line circuitLAN-91, "BCM Branch Line Circuit"
LDW camera unit branch line circuitLAN-92, "LDW Camera Unit Branch Line Circuit"
TCM branch line circuitLAN-93, "TCM Branch Line Circuit"
NAVI control unit branch line circuitLAN-93, "NAVI Control Unit Branch Line Circuit"
AV control unit branch line circuitLAN-94, "AV Control Unit Branch Line Circuit"
Data link connector branch line circuitLAN-95, "Data Link Connector Branch Line Circuit"
Intelligent Key unit branch line circuitLAN-95, "Intelligent Key Unit Branch Line Circuit"
Unified meter and A/C amp. branch line circuitLAN-96, "Unified Meter and A/C Amp. Branch Line Circuit"
Steering angle sensor branch line circuitLAN-97, "Steering Angle Sensor Branch Line Circuit"
Low tire pressure warning control unit branch line circuitLAN-97, "Low Tire Pressure Warning Control Unit Branch Line
Circuit"
RAS control unit branch line circuitLAN-98, "RAS Control Unit Branch Line Circuit"
Pre-crash seat belt control unit branch line circuitLAN-99, "Pre-Crash Seat Belt Control Unit Branch Line Circuit"
Driver seat control unit branch line circuitLAN-99, "Driver Seat Control Unit Branch Line Circuit"
ABS actuator and electric unit (control unit) branch line circuitLAN-100, "ABS Actuator and Electric Unit (Control Unit) Branch
Line Circuit"
ICC sensor integrated unit branch line circuitLAN-101, "ICC Sensor Integrated Unit Branch Line Circuit"
IPDM E/R branch line circuitLAN-101, "IPDM E/R Branch Line Circuit"
Malfunction Area Reference
CAN communication circuitLAN-102, "
CAN Communication Circuit"

TROUBLE DIAGNOSIS
LAN-87
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Revision: 2007 April2007 M35/M45
3. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the connector of pre-crash seat belt control unit.
2. Check the continuity between the harness connector and the pre-crash seat belt control unit harness con-
nector.
OK or NG
OK >>
Present error: Check the following items again.
–Decision of CAN system type.
–Not received CONSULT-II data (SELECT SYSTEM, SELF-DIAG RESULTS, CAN DIAG SUP-
PORT MNTR).
–Procedure for detecting root cause.

Past error: Error was detected in the main line between the RAS control unit and the pre-crash
seat belt control unit.
NG >> Replace the body harness.
Main Line Between Pre-crash Seat Belt Control Unit and Driver Seat Control
Unit
NKS004G8
INSPECTION PROCEDURE
1. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Disconnect the following harness connectors.
–ECM harness connector
–Pre-crash seat belt control unit harness connector
–Harness connector B15 and B202
4. Check continuity between the pre-crash seat belt control unit harness connector and the harness connec-
tor.
OK or NG
OK >>
Present error: Check the following items again.
–Decision of CAN system type.
–Not received CONSULT-II data (SELECT SYSTEM, SELF-DIAG RESULTS, CAN DIAG SUP-
PORT MNTR).
–Procedure for detecting root cause.

Past error: Error was detected in the main line between the pre-crash seat belt control unit and
the driver seat control unit.
NG >> Replace the body harness.
Harness connectorPre-crash seat belt control unit
harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
B671
B14224 Yes
12 22 Yes
Pre-crash seat belt control unit
harness connectorHarness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
B14224
B153Yes
22 19 Yes

TROUBLE DIAGNOSIS
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Revision: 2007 April2007 M35/M45
Main Line Between ABS Actuator and Electric Unit (Control Unit) and ICC Sen-
sor Integrated Unit
NKS004H0
INSPECTION PROCEDURE
1. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Disconnect the following harness connectors.
–ABS actuator and electric unit (control unit) harness connector
–ICC sensor integrated unit harness connector
–IPDM E/R harness connector
4. Check continuity between the ABS actuator and electric unit (control unit) harness connector and the ICC
sensor integrated unit harness connector.
OK or NG
OK >>
Present error: Check the following items again.
–Decision of CAN system type.
–Not received CONSULT-II data (SELECT SYSTEM, SELF-DIAG RESULTS, CAN DIAG SUP-
PORT MNTR).
–Procedure for detecting root cause.

Past error: Error was detected in the main line between the ABS actuator and electric unit (con-
trol unit) and the ICC sensor integrated unit.
NG >> Repair the main line between the ABS actuator and electric unit (control unit) and the ICC sensor
integrated unit.
ECM Branch Line CircuitNKS004GA
INSPECTION PROCEDURE
1. CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the ECM for damage, bend and loose connection (unit side and
connector side).
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of ECM.
2. Check the resistance between the ECM harness connector terminals.
OK or NG
OK >> GO TO 3.
NG >> Repair the ECM branch line.
ABS actuator and electric unit (control unit)
harness connectorICC sensor integrated unit
harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
E3035
E613Yes
14 6 Yes
ECM harness connector
Resistance (Ω)
Connector No. Terminal No.
M71 94 86 Approx. 108 – 132

LAN-90
[CAN]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the ECM. Refer to EC-154, "
POWER SUPPLY AND
GROUND CIRCUIT" (VQ engine), EC-858, "POWER SUPPLY AND GROUND CIRCUIT" (VK engine).
OK or NG
OK >>
Present error: Replace the ECM. Refer to EC-85, "Procedure After Replacing ECM" (VQ
engine), EC-787, "
Procedure After Replacing ECM" (VK engine).

Past error: Error was detected in the ECM branch line.
NG >> Repair the power supply and the ground circuit.
AWD Control Unit Branch Line CircuitNKS004GL
INSPECTION PROCEDURE
1. CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the following terminals and connectors for damage, bend and loose connection (unit side and con-
nector side).
–AWD control unit connector
–Harness connector F102
–Harness connector M72
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of AWD control unit.
2. Check the resistance between the AWD control unit harness connector terminals.
OK or NG
OK >> GO TO 3.
NG >> Repair the AWD control unit branch line.
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the AWD control unit. Refer to TF-16, "
Circuit Diagram" .
OK or NG
OK >>
Present error: Replace the AWD control unit. Refer to TF-39, "Removal and Installation" .

Past error: Error was detected in the AWD control unit branch line.
NG >> Repair the power supply and the ground circuit.
AWD control unit harness connector
Resistance (Ω)
Connector No. Terminal No.
F109 8 16 Approx. 54 – 66

TROUBLE DIAGNOSIS
LAN-103
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Revision: 2007 April2007 M35/M45
3. CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
Check the continuity between the data link connector and the ground.
OK or NG
OK >> GO TO 4.
NG >> Check the harness and repair the root cause.
4. CHECK ECM AND IPDM E/R TERMINATION CIRCUIT
1. Remove the ECM and the IPDM E/R.
2. Check the resistance between the ECM terminals.
3. Check the resistance between the IPDM E/R terminals.
OK or NG
OK >> GO TO 5.
NG >> Replace the ECM or the IPDM E/R.
5. CHECK SYMPTOM
Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with
customer)” are reproduced.
Inspection result
Reproduced>>GO TO 6.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is
detected.
6. CHECK UNIT REPRODUCTION
Perform the reproduction test as per the following procedure for each unit.
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Disconnect one of the unit connectors of CAN communication system.
NOTE:
ECM and IPDM E/R have a termination circuit. Check other units first.
4. Connect the battery cable to the negative terminal. Check if the symptoms described in the “Symptom
(Results of interview with customer)” are reproduced.
NOTE:
Although unit-related error symptoms occur, do not confuse them with other symptoms.
Inspection result
Reproduced>>Connect the connector. Check other units as per the above procedure.
Non-reproduced>>Replace unit whose connector was disconnected.
Data link connector
GroundContinuity
Connector No. Terminal No.
M606No
14 No
ECM
Resistance (Ω)
Terminal No.
94 86 Approx. 108 – 132
IPDM E/R
Resistance (Ω)
Terminal No.
49 50 Approx. 108 – 132
LKIA0037E

LT-3
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Revision: 2007 April2007 M35/M45 System Description .............................................. 134
AFS (ADAPTIVE FRONT-LIGHTING SYSTEM) . 135
HEADLAMP AUTO AIMING .............................. 136
OUTLINE ........................................................... 136
AFS OPERATION ............................................. 137
HEADLAMP AUTO AIMING OPERATION ........ 139
CAN COMMUNICATION SYSTEM DESCRIP-
TION .................................................................. 139
CAN COMMUNICATION UNIT ......................... 139
Component Parts Description .............................. 140
AFS CONTROL UNIT ....................................... 140
SWIVEL ACTUATOR ........................................ 140
AIMING MOTOR ............................................... 140
AFS SWITCH .................................................... 141
HEIGHT SENSOR ............................................ 141
STEERING ANGLE SENSOR .......................... 141
IPDM E/R .......................................................... 141
ECM .................................................................. 141
TCM .................................................................. 141
UNIFIED METER AND A/C AMP. ..................... 141
COMBINATION METER ................................... 141
Schematic ............................................................ 142
Wiring Diagram — AFS — ................................... 143
Terminals and Reference Values for AFS Control
Unit ....................................................................... 149
How to Proceed with Trouble Diagnosis .............. 151
Preliminary Check ................................................ 151
CONSULT-II Function (ADAPTIVE LIGHT) .......... 152
CONSULT-II BASIC OPERATION ..................... 152
WORK SUPPORT (STEERING ANGLE SEN-
SOR ADJUSTMENT) ........................................ 152
WORK SUPPORT (LEVELIZER ADJUSTMENT)
. 152
SELF-DIAG RESULTS ...................................... 153
DATA MONITOR ............................................... 157
ACTIVE TEST ................................................... 159
Symptom Chart .................................................... 160
DTC B2503 SWIVEL ACTUATOR RH ................. 161
DTC B2504 SWIVEL ACTUATOR LH .................. 168
DTC B2514 HI SEN UNUSUAL RR ..................... 175
DTC B2521 ECU CIRC ........................................ 179
AFS Operation Check (Function Test) ................. 182
Auto Aiming Operation Check (Function Test) ..... 184
AFS Switch Does Not Operate ............................. 186
Auto Aiming Does Not Operate (Check Aiming
Motor System Circuit) ........................................... 188
AFS OFF Indicator Does Not Operate ................. 191
Removal and Installation of Steering Angle Sensor . 191
Removal and Installation of Front Combination
Lamp .................................................................... 191
Removal and Installation of AFS Control Unit ...... 192
REMOVAL ......................................................... 192
INSTALLATION ................................................. 192
Removal and Installation of AFS Switch .............. 192
REMOVAL ......................................................... 192
INSTALLATION ................................................. 192
Removal and Installation of Height Sensor .......... 193
REMOVAL ......................................................... 193
INSTALLATION ................................................. 193FRONT FOG LAMP ................................................194
Component Parts and Harness Connector Location .194
System Description ...............................................194
OUTLINE ...........................................................195
COMBINATION SWITCH READING FUNCTION .196
EXTERIOR LAMP BATTERY SAVER CONTROL .196
CAN Communication System Description ............196
CAN Communication Unit .....................................196
Schematic .............................................................197
Wiring Diagram — F/FOG — ................................198
Terminals and Reference Values for BCM ............202
Terminals and Reference Values for IPDM E/R ....203
How to Perform Trouble Diagnoses .....................203
Preliminary Check ................................................203
CHECK POWER SUPPLY AND GROUND CIR-
CUIT ..................................................................203
CONSULT-II Functions (BCM) ..............................204
CONSULT-II Functions (IPDM E/R) ......................204
Front Fog Lamps Do Not Illuminate (Both Sides) . 205
Front Fog Lamp Does Not Illuminate (One Side) . 208
Front Fog Lamps Do Not Turn OFF ......................209
Aiming Adjustment ................................................210
Bulb Replacement ................................................211
Removal and Installation ......................................211
REMOVAL .........................................................211
INSTALLATION .................................................211
TURN SIGNAL AND HAZARD WARNING LAMPS .212
Component Parts and Harness Connector Location .212
System Description ...............................................212
TURN SIGNAL OPERATION ............................212
HAZARD LAMP OPERATION ...........................213
COMBINATION SWITCH READING FUNCTION .214
CAN Communication System Description ............214
CAN Communication Unit .....................................214
Schematic .............................................................215
Wiring Diagram — TURN — .................................216
Terminals and Reference Values for BCM ............220
How to Perform Trouble Diagnoses .....................221
Preliminary Check ................................................222
CHECK POWER SUPPLY AND GROUND CIR-
CUIT ..................................................................222
CONSULT-II Functions (BCM) ..............................223
CONSULT-II BASIC OPERATION .....................223
DATA MONITOR ...............................................223
ACTIVE TEST ...................................................223
Turn Signal Lamp Does Not Operate ...................224
Hazard Warning Lamp Does Not Operate But Turn
Signal Lamp Operate ............................................226
Turn Signal Indicator Lamp Does Not Operate ....227
Bulb Replacement/Removal and Installation of Side
Turn Signal Lamp .................................................229
REMOVAL .........................................................229
INSTALLATION .................................................229
Bulb Replacement (Front Turn Signal Lamp) .......229
Bulb Replacement (Rear Turn Signal Lamp) ........229
Removal and Installation of Front Turn Signal Lamp .229
Removal and Installation of Rear Turn Signal Lamp .229
LIGHTING AND TURN SIGNAL SWITCH ..............230
Removal and Installation ......................................230

HEADLAMP (FOR USA) - XENON TYPE -
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Revision: 2007 April2007 M35/M45
General Information for Xenon Headlamp Trouble DiagnosisNKS003P2
In most cases, malfunction of xenon headlamp - "does not illuminate", "flickers" or "dark" - is caused by a mal-
functioning xenon bulb. A HID control unit or lamp housing, however, may be a cause of malfunction. Be sure
to perform trouble diagnosis following the steps described below.
Caution:NKS003P3

Installation or removal of connector must be done with lighting switch OFF.

Disconnect the battery cable from the negative terminal or remove power fuse.

When the lamp is illuminated (when lighting switch is ON), never touch harness, HID control unit, inside of
lamp, or lamp metal parts.

To check illumination, temporarily install lamp in vehicle. Be sure to connect power at vehicle side connec-
tor.

If error can be traced directly to electrical system, first check for items such as blown fuses and fusible
links, broken wires or loose connectors, dislocated terminals, and improper connections.

Never work with wet hands.

Using a tester for HID control unit circuit trouble diagnosis is prohibited.

Disassembling HID control unit or harnesses (bulb socket harness, ECM harness) is prohibited.

Immediately after illumination, light intensity and color will fluctuate, but there is nothing wrong.

When bulb has come to end of its life, brightness will drop significantly, it will flash repeatedly, or light color
will turn reddish.
Xenon Headlamp Trouble DiagnosisNKS003P4
1. CHECK 1: XENON HEADLAMP LIGHTING
Install normal xenon bulb to corresponding xenon bulb headlamp, and check if lamp lights up.
OK or NG
OK >> Replace xenon bulb.
NG >> GO TO 2.
2. CHECK 2: XENON HEADLAMP LIGHTING
Install normal HID control unit to corresponding xenon headlamp, and check if lamp lights up.
OK or NG
OK >> Replace HID control unit.
NG >> GO TO 3.
3. CHECK 3: XENON HEADLAMP LIGHTING
Install normal xenon lamp housing assembly to corresponding xenon headlamp, and check if lamp lights up.
OK or NG
OK >> Replace xenon headlamp housing assembly.
NG >> INSPECTION END