2006 INFINITI M35 lock

BCS-14
BCM (BODY CONTROL MODULE)
Revision: 2006 January2006 M35/M45
4. Select the desired part to be diagnosed on the “SELECT TEST
ITEM” screen.
ITEMS OF EACH PART
: Applicable
NOTE:
CONSULT-II displays systems equipped in the vehicle.
PKIC0325E
System and item CONSULT-II displayDiagnostic test mode (Inspection by part)
WORK
SUPPORTSELFDIAG
RESULTSDATA
MONITORCAN DIAG
SUPPORT
MNTRACTIVE
TESTECU
PA R T
NUMBER
BCM BCM
Power door lock system DOOR LOCK
Rear window defogger REAR DEFOGGER
Warning chime BUZZER
Room lamp timer INT LAMP
Headlamp HEAD LAMP
Wiper WIPER
Turn signal lamp
Hazard lampFLASHER
Intelligent Key system INTELLIGENT KEY
Combination switch COMB SW
IVIS IMMU
Room lamp battery saver BATTERY SAVER
Trunk lid TRUNK
Vehicle security system THEFT ALM
Retained power control RETAINED PWR
Oil pressure switch SIGNAL BUFFER
Panic system PANIC ALARM

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BODY, LOCK & SECURITY SYSTEM
I BODY
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BODY, LOCK & SECURITY SYSTEM
PRECAUTIONS .......................................................... 6
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 6
Precautions for Procedures without Cowl Top Cover ..... 6
Precautions Necessary for Steering Wheel Rotation
after Battery Disconnect ........................................... 6
OPERATION PROCEDURE ................................. 6
Precautions for Work ...........................................
..... 7
PREPARATION ........................................................... 8
Special Service Tools ............................................... 8
Commercial Service Tools ........................................ 8
SQUEAK AND RATTLE TROUBLE DIAGNOSIS ...... 9
Work Flow ................................................................ 9
CUSTOMER INTERVIEW ..................................... 9
DUPLICATE THE NOISE AND TEST DRIVE ..... 10
CHECK RELATED SERVICE BULLETINS ......... 10
LOCATE THE NOISE AND IDENTIFY THE
ROOT CAUSE .................................................... 10
REPAIR THE CAUSE ......................................... 10
CONFIRM THE REPAIR ...................................... 11
Generic Squeak and Rattle Troubleshooting .......... 11
INSTRUMENT PANEL ......................................... 11
CENTER CONSOLE ............................................ 11
DOORS ................................................................ 11
TRUNK ................................................................ 12
SUNROOF/HEADLINING ................................... 12
SEATS ................................................................. 12
UNDERHOOD ..................................................... 12
Diagnostic Worksheet ............................................ 13
HOOD ....................................................................... 15
Fitting Adjustment .................................................. 15
Removal and Installation of Hood Assembly .......... 17
REMOVAL ........................................................
... 17
INSTALLETION ................................................... 18
Removal and Installation of Hood Lock Control ..... 18
REMOVAL ........................................................
... 18
INSTALLATION ................................................... 19
Hood Lock Control Inspection ................................ 20RADIATOR CORE SUPPORT .................................. 21
Removal and Installation ........................................ 21
REMOVAL ........................................................
... 21
INSTALLATION ................................................... 22
FRONT FENDER ................................................... ... 23
Removal and Installation ........................................ 23
REMOVAL ........................................................
... 23
INSTALLATION ................................................... 23
POWER DOOR LOCK SYSTEM .............................. 24
Component Parts and Harness Connector Location ... 24
System Description ................................................. 25
DOOR LOCK ACTUATOR OPERATION ............. 26
FUEL LID OPERATION ....................................... 26
OUTLINE ............................................................. 26
CAN Communication System Description .............. 26
CAN Communication Unit ....................................... 26
Schematic ............................................................... 27
Wiring Diagram —D/LOCK— ................................. 28
Terminals and Reference Value of BCM ................. 31
Work Flow ............................................................... 31
CONSULT-II Function (BCM) ................................. 32
CONSULT-II INSPECTION PROCEDURE .......... 32
CONSULT-II APPLICATION ITEMS .................... 33
Trouble Diagnosis Chart by Symptom .................... 34
Power Supply and Ground Circuit Check of BCM ... 35
Check Door Lock and Unlock Switch ..................... 36
Check Door Lock Actuator/Driver Side ................... 38
Check Door Lock Actuator/Passenger Side ........... 39
Check Door Lock Actuator/Rear LH ....................... 40
Check Door Lock Actuator/Rear RH ....................... 40
Check Fuel Lid Opener Actuator ............................ 41
Door Key Cylinder Switch Check ............................ 42
INTELLIGENT KEY SYSTEM ................................... 44
Component Parts and Harness Connector Location ... 44
System Description ................................................. 48
DOOR LOCK/UNLOCK/TRUNK OPEN FUNC-
TION .................................................................... 48
REMOTE KEYLESS ENTRY FUNCTIONS ......... 52
ENGINE START FUNCTION ............................... 54
WARNING FUNCTION ........................................ 55

BL-2Revision: 2006 January2006 M35/M45 CHANGE SETTINGS FUNCTION ....................... 60
INTELLIGENT KEY REGISTRATION .................. 60
STEERING LOCK UNIT REGISTRATION .......... 60
CAN Communication System Description .............. 60
CAN Communication Unit ....................................... 60
Schematic ............................................................... 61
Wiring Diagram — I/KEY— .................................... 63
Terminals and Reference Value for Intelligent Key
Unit ......................................................................... 74
Terminals and Reference Value for BCM ................ 77
Terminals and Reference Value for IPDM E/R ........ 77
Trouble Diagnosis Procedure ................................. 78
WORK FLOW ...................................................... 78
CONSULT-II Functions (INTELLIGENT KEY) ........ 80
CONSULT-II Inspection Procedure ......................... 80
BASIC OPERATION ............................................ 80
CONSULT-II Application Items ............................... 81
SELF-DIAGNOSTIC RESULTS ........................... 81
DATA MONITOR .................................................. 82
WORK SUPPORT ............................................... 83
ACTIVE TEST ..................................................... 84
Trouble Diagnosis Symptom Chart ......................... 86
ALL FUNCTIONS OF INTELLIGENT KEY SYS-
TEM DOES NOT OPERATE ............................... 86
DOOR LOCK/UNLOCK FUNCTION MALFUNC-
TION .................................................................... 86
REMOTE KEYLESS ENTRY FUNCTION MAL-
FUNCTION .......................................................... 87
TRUNK OPEN FUNCTION MALFUNCTION ...... 88
HAZARD AND BUZZER REMINDER FUNC-
TION MALFUNCTION ......................................... 89
HAZARD AND HORN REMINDER FUNCTION
MALFUNCTION ................................................... 89
POWER WINDOW DOWN FUNCTION MAL-
FUNCTION .......................................................... 90
WARNING FUNCTION MALFUNCTION ............. 90
Check CAN Communication System ...................... 92
Check Power Supply and Ground Circuit ............... 93
Check Key Slot ....................................................... 94
Check Door Switch ..............................................
... 96
Check Trunk Room Lamp Switch ........................... 99
Check Door Request Switch .................................101
Check Trunk Opener Request Switch ..................103
Check Unlock Sensor ...........................................105
Check Intelligent Key Warning Buzzer .................107
Check Outside Key Antenna (Driver Side and Pas-
senger Side) .........................................................108
Check Outside Key Antenna (Trunk Room) .........110
Check Inside Key Antenna ...................................112
Check Park Position Switch ..................................115
Check Ignition Switch Position .............................117
Check Remote Keyless Entry Receiver ................117
Check Trunk Lid Opener Cancel Switch ...............121
Check Key Slot Illumination ..................................123
Check Horn Function ............................................124
Check Combination Meter Display Function .........124
Check Warning Chime Function ...........................125
Removal and Installation of Intelligent Key Unit ...125
REMOVAL ........................................................
.125INSTALLATION ..................................................125
Intelligent Key Battery Replacement .....................126
DISASSEMBLY AND ASSEMBLY OF INTELLI-
GENT KEY .........................................................126
INTELLIGENT KEY BATTERY INSPECTION ...126
INTELLIGENT KEY SYSTEM/ENGINE START
FUNCTION ..............................................................127
Component Parts and Harness Connector Location .127
System Description ...............................................128
PRECAUTIONS FOR INTELLIGENT KEY SYS-
TEM ...................................................................129
Operation Description ...........................................129
SYSTEM DIAGRAM ..........................................129
OPERATION WHEN INTELLIGENT KEY IS
CARRIED ...........................................................129
OPERATION WHEN KEY SLOT IS USED ........130
PUSH-BUTTON IGNITION SWITCH OPERA-
TION PROCEDURE ..........................................130
CAN Communication System Description ............131
CAN Communication Unit .....................................131
Schematic .............................................................132
Wiring Diagram —ENG/ST— ................................134
Terminals and Reference Value for Intelligent Key
Unit ........................................................................143
Terminals and Reference Value for Steering Lock
Unit ........................................................................146
Terminals and Reference Value for BCM ..............147
Terminals and Reference Value for IPDM E/R ......147
Terminals and Reference Value for PDU ..............148
Work Flow .............................................................149
CONSULT-II Functions (INTELLIGENT KEY) .......151
CONSULT-II Inspection Procedure .......................151
BASIC OPERATION ..........................................151
CONSULT-II Application Items ..............................152
SELF-DIAGNOSTIC RESULTS .........................152
DATA MONITOR ................................................153
WORK SUPPORT .............................................154
ACTIVE TEST ....................................................155
DTC B2013 STRG COMM 1 .................................157
DIAGNOSIS DESCRIPTION .............................157
TERMINALS AND REFERENCE VALUE FOR
INTELLIGENT KEY UNIT ..................................157
SELF-DIAGNOSTIC LOGIC ..............................157
DIAGNOSTIC PROCEDURE .............................157
DTC B2551 STEERING LOCK UNIT ....................159
DIAGNOSIS DESCRIPTION .............................159
TERMINALS AND REFERENCE VALUE ..........159
SELF-DIAGNOSTIC LOGIC .............................
.160
DIAGNOSTIC PROCEDURE .............................160
DTC B2552 INTELLIGENT KEY ...........................163
DIAGNOSIS DESCRIPTION .............................163
DTC B2553 IGN POWER CIRCUIT ......................163
DIAGNOSIS DESCRIPTION .............................163
TERMINAL AND REFERENCE VALUE FOR
INTELLIGENT KEY UNIT ..................................163
CONSULT-II DATA MONITOR STANDARD
VALUE ...............................................................163
SELF-DIAGNOSTIC LOGIC ..............................164
DIAGNOSTIC PROCEDURE .............................164

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DIAGNOSIS DESCRIPTION .............................164
TERMINALS AND REFERENCE VALUE FOR
INTELLIGENT KEY UNIT .................................165
CONSULT-II DATA MONITOR STANDARD
VALUE ...............................................................165
SELF-DIAGNOSTIC LOGIC .............................165
DIAGNOSTIC PROCEDURE ............................166
DTC B2555 STOP LAMP CIRCUIT .....................167
DIAGNOSIS DESCRIPTION .............................167
TERMINALS AND REFERENCE VALUE FOR
INTELLIGENT KEY UNIT INPUT ......................167
CONSULT-II DATA MONITOR STANDARD
VALUE ...............................................................167
SELF-DIAGNOSTIC LOGIC .............................167
DIAGNOSTIC PROCEDURE ............................168
DTC B2556 ENG START SW ..............................168
DIAGNOSIS DESCRIPTION .............................168
TERMINALS AND REFERENCE VALUE FOR
INTELLIGENT KEY UNIT .................................168
SELF-DIAGNOSTIC LOGIC .............................168
DIAGNOSTIC PROCEDURE ............................169
DTC B2557 VEHICLE SPEED .............................169
DIAGNOSIS DESCRIPTION .............................169
TERMINALS AND REFERENCE VALUE FOR
INTELLIGENT KEY UNIT .................................170
SELF-DIAGNOSTIC LOGIC .............................170
DIAGNOSTIC PROCEDURE ............................170
DTC B2558 SHIFT POSITION .............................172
DIAGNOSIS DESCRIPTION .............................172
TERMINALS AND REFERENCE VALUE FOR
INTELLIGENT KEY UNIT .................................172
SELF-DIAGNOSTIC LOGIC .............................172
DIAGNOSTIC PROCEDURE ............................172
DTC B2559 PDU ..................................................174
DIAGNOSIS DESCRIPTION .............................174
DTC B2560 START POW SUP CIRC ..................174
DIAGNOSIS DESCRIPTION .............................174
TERMINALS AND REFERENCE VALUE .........175
SELF-DIAGNOSTIC LOGIC .............................175
DIAGNOSTIC PROCEDURE ............................175
DTC B2562 LOW VOLTAGE ................................177
DIAGNOSIS DESCRIPTION .............................177
TERMINALS AND REFERENCE VALUE FOR
INTELLIGENT KEY UNIT .................................177
SELF-DIAGNOSTIC LOGIC .............................177
DIAGNOSTIC PROCEDURE ............................177
DTC B2563 HI VOLTAGE ....................................178
DIAGNOSIS DESCRIPTION .............................178
TERMINAL AND REFERENCE VALUE FOR
INTELLIGENT KEY UNIT .................................178
SELF-DIAGNOSTIC LOGIC .............................178
DIAGNOSTIC PROCEDURE ............................179
Trouble Diagnosis Symptom Chart 1 ...................179
CONDITIONS OF VEHICLE (OPERATING CON-
DITIONS) ..........................................................179
Trouble Diagnosis Symptom Chart 2 ...................180
CONDITIONS OF VEHICLE (OPERATING CON-
DITIONS) ..........................................................180Trouble Diagnosis Symptom Chart 3 ....................180
CONDITIONS OF VEHICLE (OPERATING CON-
DITIONS) ...........................................................180
Check CAN Communication System ....................181
Check Push-Button Ignition Switch ......................181
Check Inside Key Antenna ...................................183
Check Remote Keyless Entry Receiver ................185
Check Key Switch Built In Key Slot ......................186
Check NATS Antenna Amp. Built In Key Slot .......188
DOOR ......................................................................190
Fitting Adjustment .................................................190
FRONT DOOR ..................................................190
REAR DOOR .....................................................190
STRIKER ADJUSTMENT ..................................191
Removal and Installation of Front Door ................191
REMOVAL ........................................................
.191
INSTALLATION .................................................192
Removal and Installation of Rear Door .................192
REMOVAL ........................................................
.192
INSTALLATION .................................................193
Door Weatherstrip ................................................194
FRONT DOOR ..................................................194
REMOVAL ........................................................
.194
INSTALLATION .................................................194
REAR DOOR .....................................................195
REMOVAL ........................................................
.195
INSTALLATION .................................................195
FRONT DOOR LOCK .............................................196
Component Structure ............................................196
Removal and Installation ......................................196
REMOVAL ........................................................
.196
INSTALLATION .................................................199
REAR DOOR LOCK ...............................................200
Component Structure ............................................200
Removal and Installation ......................................200
REMOVAL ........................................................
.200
INSTALLATION .................................................202
TRUNK LID .............................................................203
Fitting Adjustment .................................................203
Removal and Installation of Trunk Lid Assembly ..204
REMOVAL ........................................................
.204
INSTALLATION .................................................205
Removal and Installation of Trunk Lid Stay ..........205
REMOVAL ........................................................
.205
INSTALLATION .................................................205
Removal and Installation of Trunk Lid Lock ..........206
REMOVAL .......................................................
. .206
INSTALLATION .................................................206
Removal and Installation of Trunk Lid Striker .......207
REMOVAL ........................................................
.207
INSTALLATION .................................................207
Removal and Installation of Trunk Lid Weatherstrip .208
REMOVAL ........................................................
.208
INSTALLATION .................................................208
TRUNK LID OPENER .............................................209
Component Parts and Harness Connector Location .209
System Description ...............................................210
TRUNK LID OPENER OPERATION .................210
Wiring Diagram —TLID— .....................................211

BL-4Revision: 2006 January2006 M35/M45 Terminals and Reference Value for BCM ..............213
CONSULT-II Function (BCM) ................................214
CONSULT-II INSPECTION PROCEDURE ........214
DATA MONITOR ................................................215
ACTIVE TEST ...................................................215
Trouble Diagnosis .................................................216
TRUNK DOSE NOT OPEN WITH TRUNK LID
OPENER SWITCH / WITH INTELLIGENT KEY .216
VEHICLE SECURITY (THEFT WARNING) SYSTEM .220
Component Parts and Harness Connector Location .220
System Description ...............................................222
DESCRIPTION ..................................................222
POWER SUPPLY AND GROUND CIRCUIT .....223
INITIAL CONDITION TO ACTIVATE THE SYS-
TEM ...................................................................223
VEHICLE SECURITY SYSTEM ALARM OPER-
ATION ................................................................224
VEHICLE SECURITY SYSTEM DEACTIVATION .224
PANIC ALARM OPERATION .............................224
CAN Communication System Description ............224
CAN Communication Unit .....................................224
Schematic .............................................................225
Wiring Diagram —VEHSEC— ..............................226
Terminals and Reference Value of BCM ...............232
Terminals and Reference Value of IPDM E/R .......232
CONSULT-II Function (BCM) ................................233
CONSULT-II APPLICATION ITEM .....................234
Trouble Diagnosis Work Flow ...............................235
Preliminary Check ................................................235
Trouble Diagnosis Symptom Chart .......................237
Diagnostic Procedure 1 ........................................238
DOOR SWITCH CHECK ...................................238
HOOD SWITCH CHECK ...................................241
TRUNK ROOM LAMP SWITCH CHECK ..........243
Diagnostic Procedure 2 ........................................245
SECURITY INDICATOR LAMP CHECK ............245
Diagnostic Procedure 3 ........................................246
FRONT DOOR KEY CYLINDER SWITCH
CHECK ..............................................................246
Diagnostic Procedure 4 ........................................246
VEHICLE SECURITY HORN ALARM CHECK . 246
Diagnostic Procedure 5 ........................................247
VEHICLE SECURITY HEADLAMP ALARM
CHECK ..............................................................247
Diagnostic Procedure 6 ........................................247
DOOR LOCK AND UNLOCK SWITCH CHECK .247
Diagnostic Procedure 7 ........................................247
VEHCLE SECURITY HAZARD LAMP ALARM
CHECK ..............................................................247
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS) ......................................................................248
Component Parts and Harness Connector Location .248
System Description ...............................................250
DESCRIPTION ..................................................250
PRECAUTIONS FOR KEY REGISTRATION ....250
SECURITY INDICATOR ....................................250
Operation Description ...........................................251
SYSTEM DIAGRAM ..........................................251
OPERATION WHEN INSERTING TO KEY SLOT .251OPERATION WHEN INTELLIGENT KEY IS
CARRIED ...........................................................251
PUSH-BUTTON IGNITION SWITCH OPERA-
TION PROCEDURE ..........................................251
ECM Re-Communicating Function .......................252
Schematic .............................................................254
Wiring Diagram — NATS — ..................................256
Terminals and Reference Value for Intelligent Key
Unit ........................................................................264
Terminals and Reference Value for Steering Lock
Unit ........................................................................266
Terminals and Reference Value for BCM ..............266
Terminals and Reference Value for IPDM E/R ......267
Terminals and Reference Value for PDU ..............267
CONSULT-II ..........................................................268
CONSULT-II INSPECTION PROCEDURE ........268
CONSULT-II DIAGNOSTIC TEST MODE FUNC-
TION ..................................................................270
HOW TO READ SELF-DIAGNOSTIC RESULTS .270
“NATS V5.0” SELF-DIAGNOSTIC RESULTS
ITEM CHART .....................................................271
“NATS BCM OR S/ENT” SELF-DIAGNOSTIC
RESULTS ITEM CHART ....................................271
“NATS I-KEY” SELF-DIAGNOSTIC RESULTS
ITEM CHART .....................................................272
Work Flow .............................................................272
Trouble Diagnoses Flow Chart for IVIS (NATS) ....275
Symptom Chart for Security Indicator ...................277
CONDITIONS OF VEHICLE (OPERATING CON-
DITIONS) ...........................................................277
Check Security Indicator Harness .........................277
DTC P1612 CHAIN of ECM-IMMU .......................278
DTC P1611 ID DISCORD, IMM-ECM ...................280
Removal and Installation of Key Slot ....................280
REMOVAL ..........................................................280
INSTALLATION ..................................................280
INTEGRATED HOMELINK TRANSMITTER ...........281
Wiring Diagram —TRNSCV— ..............................281
Trouble Diagnoses ................................................282
DIAGNOSTIC PROCEDURE .............................282
BODY REPAIR ........................................................284
Body Exterior Paint Color ......................................284
Body Component Parts .........................................285
UNDERBODY COMPONENT PARTS ...............285
BODY COMPONENT PARTS ............................287
Corrosion Protection ..........................................
...289
DESCRIPTION ..................................................289
UNDERCOATING ..............................................290
Body Sealing .........................................................291
DESCRIPTION ..................................................291
Body Construction .................................................294
BODY CONSTRUCTION ...................................294
Body Alignment .....................................................295
BODY CENTER MARKS ...................................295
PANEL PARTS MATCHING MARKS .................296
DESCRIPTION ..................................................297
ENGINE COMPARTMENT ................................298
UNDERBODY ....................................................300
PASSENGER COMPARTMENT ........................302

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PRECAUTIONS
Revision: 2006 January2006 M35/M45
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NIS001WA
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WAR NING :
To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.
Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for Procedures without Cowl Top CoverNIS001WB
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
Precautions Necessary for Steering Wheel Rotation after Battery DisconnectNIS001WC
NOTE:
Before removing and installing any control units, first turn the push-button ignition switch to the LOCK
position, then disconnect both battery cables.
After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
Always use CONSULT-II to perform self-diagnosis as a part of each function inspection after finishing
work. If a DTC is detected, perform trouble diagnosis according to self-diagnosis results.
This vehicle is equipped with a push-button ignition switch and a steering lock unit.
If the battery is disconnected or discharged, the steering wheel will lock and cannot be turned.
If turning the steering wheel is required with the battery disconnected or discharged, follow the procedure
below before starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2. Carry the Intelligent Key or insert it to the key slot and turn the push-button ignition switch to ACC position.
(At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock will remain released with both battery cables discon-
nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
PIIB3706J

PRECAUTIONS
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5. When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button ignition switch is turned to LOCK position.)
6. Perform self-diagnosis check of all control units using CONSULT-II.
Precautions for WorkNIS001WD
After removing and installing the opening/closing parts, be sure to carry out fitting adjustments to check
their operational.
Check the lubrication level, damage, and wear of each part. If necessary, grease or replace it.

SQUEAK AND RATTLE TROUBLE DIAGNOSIS
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SQUEAK AND RATTLE TROUBLE DIAGNOSISPFP:00000
Work FlowNIS001WG
CUSTOMER INTERVIEW
Interview the customer if possible, to determine the conditions that exist when the noise occurs.Use the Diag-
nostic Worksheet during the interview to document the facts and conditions when the noise occurs and any
customer's comments; refer to BL-13, "
Diagnostic Worksheet" . This information is necessary to duplicate the
conditions that exist when the noise occurs.
The customer may not be able to provide a detailed description or the location of the noise. Attempt to
obtain all the facts and conditions that exist when the noise occurs (or does not occur).
If there is more than one noise in the vehicle, be sure to diagnose and repair the noise that the customer
is concerned about. This can be accomplished by test driving the vehicle with the customer.
After identifying the type of noise, isolate the noise in terms of its characteristics. The noise characteristics
are provided so the customer, service adviser and technician are all speaking the same language when
defining the noise.
Squeak —(Like tennis shoes on a clean floor)
Squeak characteristics include the light contact/fast movement/brought on by road conditions/hard sur-
faces=higher pitch noise/softer surfaces=lower pitch noises/edge to surface=chirping
Creak—(Like walking on an old wooden floor)
Creak characteristics include firm contact/slow movement/twisting with a rotational movement/pitch
dependent on materials/often brought on by activity.
Rattle—(Like shaking a baby rattle)
Rattle characteristics include the fast repeated contact/vibration or similar movement/loose parts/missing
clip or fastener/incorrect clearance.
Knock —(Like a knock on a door)
Knock characteristics include hollow sounding/sometimes repeating/often brought on by driver action.
Tick—(Like a clock second hand)
Tick characteristics include gentle contacting of light materials/loose components/can be caused by driver
action or road conditions.
Thump—(Heavy, muffled knock noise)
Thump characteristics include softer knock/dead sound often brought on by activity.
Buzz—(Like a bumble bee)
Buzz characteristics include high frequency rattle/firm contact.
Often the degree of acceptable noise level will vary depending upon the person. A noise that you may
judge as acceptable may be very irritating to the customer.
Weather conditions, especially humidity and temperature, may have a great effect on noise level.
SBT842