2006 INFINITI M35 ground

AT-234
A/T SHIFT LOCK SYSTEM
Revision: 2006 January2006 M35/M45
5. CHECK INPUT SIGNAL A/T DEVICE
1. Turn ignition switch OFF.
2. Disconnect A/T device harness connector.
3. Turn ignition switch ON. (Do not start engine.)
4. Check voltage between A/T device harness connector M133 ter-
minal 7 and ground.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6. DETECT MALFUNCTIONING ITEM
Check the following.
Harness for short or open between push-button ignition switch and shift lock relay E35 terminal 5
Harness for short or open between shift lock relay E35 terminal 3 and A/T device harness connector
M133 terminal 7
10A fuse [No.12, located in the fuse block (J/B)]
Push-button ignition switch (Refer to PG-3, "POWER SUPPLY ROUTING CIRCUIT" .)
Shift lock relay
–Check continuity between shift lock relay E35 terminal 3 and 5
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect A/T device harness connector.
3. Check continuity between A/T device harness connector M133
terminal 8 and ground.
If OK, check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors. Vo l ta g e
Brake pedal depressed: Battery voltage
Brake pedal released: 0V
SCIA6867E
Condition Continuity
12V direct current supply between terminal 1 and 2 Yes
OFF No
SCIA1245E
Continuity should exist.
SCIA6868E

ATC-2Revision: 2006 January2006 M35/M45 AUTO SWITCH ................................................... 34
DEFROSTER (DEF) SWITCH ............................. 34
UPPER VENT SWITCH ...................................... 34
A/C SWITCH ....................................................... 35
FAN SWITCHES .................................................. 35
OFF SWITCH ...................................................... 35
REAR WINDOW DEFOGGER SWITCH ............. 35
INTAKE SWITCH ................................................. 35
DUAL SWITCH .................................................... 35
Control Operation (Rear Control Switch) ................ 35
AUTO SWITCH ................................................... 35
FAN SWITCH ...................................................... 35
REAR TEMPERATURE CONTROL SWITCH ..... 35
Fail-Safe Function .................................................. 36
Discharge Air Flow ................................................. 37
System Description ................................................. 38
SWITCHES AND THEIR CONTROL FUNCTION ... 38
CAN Communication System Description .............. 39
TROUBLE DIAGNOSIS ............................................ 40
CONSULT-II Function (ECM) .................................. 40
CONSULT-II BASIC OPERATION ....................... 40
DATA MONITOR .................................................. 40
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ...................................................... 40
WORK FLOW ...................................................... 40
SYMPTOM TABLE .............................................. 41
Component Parts and Harness Connector Location ... 42
ENGINE COMPARTMENT .................................. 42
PASSENGER COMPARTMENT .......................... 43
Schematic ............................................................... 44
Wiring Diagram —A/C— ......................................... 46
Auto Amp. Terminals and Reference Value ............ 53
PIN CONNECTOR TERMINAL LAYOUT ............ 53
TERMINALS AND REFERENCE VALUE FOR
UNIFIED METER AND A/C AMP. ........................ 53
Self-diagnosis Function .......................................... 55
DESCRIPTION .................................................... 55
FUNCTION CONFIRMATION PROCEDURE ...... 56
AUXILIARY MECHANISM: TEMPERATURE
SETTING TRIMMER ........................................... 62
AUXILIARY MECHANISM: FOOT POSITION
SETTING TRIMMER ........................................... 63
AUXILIARY MECHANISM: INLET PORT MEM-
ORY FUNCTION ................................................. 63
Operational Check .................................................. 64
CHECKING MEMORY FUNCTION ..................... 64
CHECKING BLOWER ......................................... 64
CHECKING DISCHARGE AIR (MODE SWITCH
AND DEF SWITCH) ............................................ 64
CHECKING DISCHARGE AIR (UPPER VENT
SWITCH) ............................................................. 65
CHECKING INTAKE AIR ..................................... 65
CHECKING TEMPERATURE DECREASE ......... 65
CHECKING TEMPERATURE INCREASE .......... 65
CHECKING A/C SWITCH ................................... 65
CHECKING AUTO MODE ................................... 65
Power Supply and Ground Circuit for Auto Amp. ... 66
INSPECTION FLOW ........................................... 66
COMPONENT DESCRIPTION ............................ 67DIAGNOSIS PROCEDURE FOR A/C SYSTEM ... 67
Rear Control Switch Circuit ..................................... 69
DIAGNOSIS PROCEDURE FOR REAR CON-
TROL SWITCH .................................................... 69
LAN System Circuit ................................................. 70
DIAGNOSIS PROCEDURE FOR LAN CIRCUIT ... 70
Mode Door Motor Circuit ......................................... 75
INSPECTION FLOW ............................................ 76
SYSTEM DESCRIPTION ..................................... 78
COMPONENT DESCRIPTION ............................ 79
DIAGNOSIS PROCEDURE FOR MODE DOOR
MOTOR ................................................................ 79
Upper Ventilator Door Motor Circuit ........................ 80
INSPECTION FLOW ............................................ 80
SYSTEM DESCRIPTION ..................................... 81
COMPONENT DESCRIPTION ............................ 82
DIAGNOSIS PROCEDURE FOR UPPER VEN-
TILATOR DOOR MOTOR .................................... 82
Air Mix Door Motor Circuit ....................................... 83
INSPECTION FLOW ............................................ 83
SYSTEM DESCRIPTION ..................................... 84
COMPONENT DESCRIPTION ............................ 85
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR
MOTOR ................................................................ 85
Air Mix Door Motor PBR Circuit .............................. 85
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR
MOTOR PBR ....................................................... 85
Intake Door Motor Circuit ........................................ 86
INSPECTION FLOW ............................................ 86
SYSTEM DESCRIPTION ..................................... 87
COMPONENT DESCRIPTION ............................ 88
DIAGNOSIS PROCEDURE FOR INTAKE DOOR
MOTOR ................................................................ 88
Blower Motor Circuit ................................................ 89
INSPECTION FLOW ............................................ 89
SYSTEM DESCRIPTION ..................................... 90
COMPONENT DESCRIPTION ............................ 91
DIAGNOSIS PROCEDURE FOR BLOWER
MOTOR ................................................................ 91
COMPONENT INSPECTION ............................... 93
Magnet Clutch Circuit .............................................. 94
INSPECTION FLOW ............................................ 94
SYSTEM DESCRIPTION ..................................... 95
DIAGNOSIS PROCEDURE FOR MAGNET
CLUTCH .............................................................. 95
COMPONENT INSPECTION ............................... 98
Insufficient Cooling .................................................. 99
INSPECTION FLOW ............................................ 99
PERFORMANCE TEST DIAGNOSIS ................101
PERFORMANCE CHART ..................................103
TROUBLE DIAGNOSIS FOR UNUSUAL PRES-
SURE .................................................................105
DIAGNOSIS PROCEDURE FOR INSUFFI-
CIENT COOLING ...............................................107
Insufficient Heating ...............................................109
INSPECTION FLOW ..........................................109
Noise .....................................................................110
INSPECTION FLOW ..........................................110
Self-Diagnosis ....................................................... 111

AIR CONDITIONER CONTROL
ATC-29
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Revision: 2006 January2006 M35/M45
AIR CONDITIONER CONTROLPFP:27500
Description of Air Conditioner LAN Control SystemNJS000G4
The LAN (Local Area Network) system consists of unified meter and A/C amp., mode door motors, air mix
door motors, upper ventilator door motor and intake door motor.
A configuration of these components is shown in the figure below.
System ConstructionNJS000G5
A small network is constructed between the unified meter and A/C amp., mode door motors, air mix door
motors, upper ventilator door motor and intake door motor. The unified meter and A/C amp. and motors are
connected by data transmission lines and motor power supply lines. The LAN network is built through the
ground circuits of each door motor.
Addresses, motor opening angle signals, motor stop signals and error checking messages are all transmitted
through the data transmission lines connecting the unified meter and A/C amp. and each door motor.
The following functions are contained in LCUs built into the mode door motors, the air mix door motors, the
upper ventilator door motor and the intake door motor.
Address
Motor opening angle signals
Data transmission
Motor stop and drive decision
Opening angle sensor (PBR function)
Comparison
Decision (Unified meter and A/C amp. indicated value and motor opening angle comparison)
RJIA4016E
RJIA4017E

TROUBLE DIAGNOSIS
ATC-41
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Revision: 2006 January2006 M35/M45
SYMPTOM TABLE
Symptom Reference Page
A/C system does not come on. Go to Trouble Diagnosis Procedure for A/C System.ATC-66, "
Power
Supply and Ground
Circuit for Auto
Amp."
A/C system cannot be controlled. Go to Multifunction Switch System.AV-108, "
Multifunc-
tion Switch Cannot
Be Operated" (With-
out mobile enter-
tainment system) or
AV-253, "
Multifunc-
tion Switch Cannot
Be Operated" ( Wi t h
mobile entertain-
ment system)
Air outlet does not change.
Go to Trouble Diagnosis Procedure for Mode Door Motor. (LAN)ATC-75, "
Mode
Door Motor Circuit"Mode door motor does not operate normally.
Upper ventilator outlet does not change.
Go to Trouble Diagnosis Procedure for Upper Ventilator Door
Motor. (LAN)ATC-80, "
Upper
Ventilator Door
Motor Circuit"Upper ventilator door motor does not oper-
ate normally.
Discharge air temperature does not change.
Go to Trouble Diagnosis Procedure for Air Mix Door Motor.
(LAN)AT C - 8 3 , "
Air Mix
Door Motor Circuit"Air mix door motor does not operate nor-
mally.
Intake door does not change.
Go to Trouble Diagnosis Procedure for Intake Door Motor. (LAN)AT C - 8 6 , "
Intake
Door Motor Circuit"Intake door motor does not operate nor-
mally.
Blower motor operation is malfunctioning. Go to Trouble Diagnosis Procedure for Blower Motor.ATC-89, "
Blower
Motor Circuit"
Magnet clutch does not engage. Go to Trouble Diagnosis Procedure for Magnet Clutch.AT C - 9 4 , "Magnet
Clutch Circuit"
Insufficient coolingGo to Trouble Diagnosis Procedure for Insufficient Cooling.ATC-99, "
Insufficient
Cooling"
Go to Diagnosis Procedure for Insufficient Cooling.ATC-107, "
DIAG-
NOSIS PROCE-
DURE FOR
INSUFFICIENT
COOLING"
Insufficient heating Go to Trouble Diagnosis Procedure for Insufficient Heating.ATC-109, "Insuffi-
cient Heating"
Noise Go to Trouble Diagnosis Procedure for Noise.AT C - 11 0 , "Noise"
Self-diagnosis cannot be performed. Go to Trouble Diagnosis Procedure for Self-diagnosis.AT C - 111 , "Self-
Diagnosis"
Memory function does not operate. Go to Trouble Diagnosis Procedure for Memory Function.AT C - 11 2 , "Memory
Function"
Rear control switch does not operate. Go to Trouble Diagnosis Procedure for Rear Control Switch.AT C - 6 9 , "Rear Con-
trol Switch Circuit"

TROUBLE DIAGNOSIS
ATC-53
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Revision: 2006 January2006 M35/M45
Auto Amp. Terminals and Reference ValueNJS000GI
Measure voltage between each terminal and ground by referring ter-
minals and reference value for unified meter and A/C amp.
PIN CONNECTOR TERMINAL LAYOUT
TERMINALS AND REFERENCE VALUE FOR UNIFIED METER AND A/C AMP.
RJIA4032E
RJIA4033E
Terminal
No.Wire
colorItemIgnition
switchConditionVoltage
(V)
38 L/Y Blower motor control signal ON Blower speed: 1st step
41 V Power supply from ACC ACC — Battery voltage
43 R Intake sensor — — —
44 GR In-vehicle sensor — — —
45 W/V Ambient sensor — — —
46 BR/Y Sunload sensor — — —
53 W/G Power supply from IGN ON — Battery voltage
54 W/G Power supply from BATT OFF — Battery voltage
55 B Ground ON — Approx. 0
56 L CAN-H — — —
59 O/B Intake sensor ground ON — Approx. 0
60 P In-vehicle sensor ground ON — Approx. 0
61 LG/R Ambient sensor ground ON — Approx. 0
62 V/R Sunload sensor ground ON — Approx. 0
SJIA1454J

ATC-54
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
65 OECV (Electric Control Valve)
signalONSelf-diagnosis. STEP-4
(Code No. 45)
69 R A/C LAN signal ON —
70 WPower supply for each door
motorON — Battery voltage
71 B Ground (Power) ON — Approx. 0
72 P CAN-L — — — Te r m i n a l
No.Wire
colorItemIgnition
switchConditionVoltag e
(V)
SJIA1458J
SJIA1453J

TROUBLE DIAGNOSIS
ATC-65
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Revision: 2006 January2006 M35/M45
CHECKING DISCHARGE AIR (UPPER VENT SWITCH)
1. Press temperature control (DOWN) switch (driver side) until 18C (60F) is displayed.
2. Press fan (UP:+) switch until Max. speed.
3. Set MODE switch (driver side) to VENT position.
4. Press UPPER VENT switch.
AUTO indicator should illuminate.
5. Press temperature control (UP) switch (driver side) until 32
C (90F) is displayed.
6. Conform that discharger come out.
7. Press UPPER VENT switch again.
AUTO indicator should OFF.
If NG, go to trouble diagnosis procedure for ATC-80, "
Upper Ventilator Door Motor Circuit" .
If OK, continue the check.
CHECKING INTAKE AIR
1. Press intake switch. Recirculation indicator should illuminate.
2. Press intake switch again. Fresh indicator should illuminate.
3. Listen for intake door position change. (Slight change of blower sound can be heard.)
If NG, go to trouble diagnosis procedure for ATC-86, "
Intake Door Motor Circuit" .
If OK, continue the check.
NOTE:
Confirm that the compressor clutch is engaged (sound or visual inspection) and intake door position is at
FRESH when the D/F or DEF is selected.
CHECKING TEMPERATURE DECREASE
1. Press temperature control (DOWN) switch (driver side) until 18C (60F) is displayed.
2. Check for cold air at discharge air outlets.
If NG, go to trouble diagnosis procedure for ATC-99, "
Insufficient Cooling" .
If OK, continue the check.
CHECKING TEMPERATURE INCREASE
1. Press temperature control (UP) switch (driver side) until 32C (90F) is displayed.
2. Check for hot air at discharge air outlets.
If NG, go to trouble diagnosis procedure for ATC-109, "
Insufficient Heating" .
If OK, continue the check.
CHECKING A/C SWITCH
1. Press AUTO switch and A/C switch.
2. A/C switch indicator will turn ON.
Confirm that the compressor clutch engages (sound or visual inspection).
CHECKING AUTO MODE
1. Press AUTO switch and A/C switch.
2. Display should indicate AUTO.
Discharge air and blower speed will depend on ambient, in-vehicle, and set temperatures.
If NG, go to trouble diagnosis procedure for AT C - 6 6 , "
Power Supply and Ground Circuit for Auto Amp." , then
if necessary, trouble diagnosis procedure for AT C - 9 4 , "
Magnet Clutch Circuit" .
If all operational checks are OK (symptom cannot be duplicated), go to Incident Simulation Tests in GI-28,
"How to Perform Efficient Diagnosis for an Electrical Incident" and perform tests as outlined to simulate driv-
ing conditions environment. If symptom appears, refer to AT C - 4 1 , "
SYMPTOM TABLE" and perform applica-
ble trouble diagnosis procedures.

ATC-66
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
Power Supply and Ground Circuit for Auto Amp.NJS000GL
SYMPTOM: A/C system does not come on.
INSPECTION FLOW
*1ATC-67, "DIAGNOSIS PROCE-
DURE FOR A/C SYSTEM"
*2ATC-64, "Operational Check"*3AV-108, "Multifunction Switch Can-
not Be Operated" (Without mobile
entertainment system) or AV-253,
"Multifunction Switch Cannot Be
Operated" (With mobile entertain-
ment system)
RJIA4047E