Check engine NISSAN TIIDA 2007 Service Repair Manual

PRECAUTIONS
RSU-3
< PRECAUTION >
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000001724583
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.
WARNING:
• 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 performed by
an authorized NISSAN/INFINITI dealer.
 Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
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 har-
ness connectors.
Precaution for Rear SuspensionINFOID:0000000001724584
 When installing the rubber bushings, the final tightening must be done under unladen condition and with the
tires on level ground. Oil will shorten the life of the rubber bushings, so wipe off any spilled oil immediately.
 Unladen condition means the fuel tank, engine coolant and lubricants are at the full specification. The spare
tire, jack, hand tools, and mats are in their designated positions.
 After installing suspension components, check the wheel alignment.
 Caulking nuts are not reusable. Always use new caulking nuts for installation. New caulking nuts are pre-
oiled, do not apply any additional lubrication.

REAR SUSPENSION ASSEMBLY
RSU-5
< ON-VEHICLE MAINTENANCE >
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ON-VEHICLE MAINTENANCE
REAR SUSPENSION ASSEMBLY
On-Vehicle Inspection and ServiceINFOID:0000000001724575
Make sure the mounting conditions (looseness, backlash) of each component and component conditions
(wear, damage) are within specifications.
SHOCK ABSORBER INSPECTION
Check shock absorber for oil leakage, damage and replace it if necessary.
Wheel AlignmentINFOID:0000000001724576
DESCRIPTION
Measure wheel alignment under unladen conditions.
NOTE:
“Unladen conditions” means that fuel, engine coolant, and lubricant are full. Spare tire, jack, hand tools and
mats are in designated positions.
PRELIMINARY
Check the following:
1. Tires for improper air pressure and wear.
2. Road wheels for runout. Refer to WT-5, "
Inspection" .
3. Wheel bearing axial end play. Refer to RAX-5, "
On-Vehicle Inspection and Service" .
4. Shock absorber operation.
5. Each mounting part of suspension for looseness and deformation.
6. Rear suspension beam for cracks, deformation, and other damage.
7. Vehicle height (posture).
GENERAL INFORMATION AND RECOMMENDATIONS
1. A Four-Wheel Thrust Alignment should be performed.
 This type of alignment is recommended for any NISSAN vehicle.
 The four-wheel “thrust” process helps ensure that the vehicle is properly aligned and the steering wheel
is centered.
 The alignment machine itself should be capable of accepting any NISSAN vehicle.
 The alignment machine should be checked to ensure that it is level.
2. Make sure the alignment machine is properly calibrated.
 Your alignment machine should be regularly calibrated in order to give correct information.
 Check with the manufacturer of your specific alignment machine for their recommended Service/Cali-
bration Schedule.
THE ALIGNMENT PROCESS
IMPORTANT: Use only the alignment specifications listed in this Service Manual. Refer to RSU-5, "Wheel
Alignment" .
1. When displaying the alignment settings, many alignment machines use “indicators”: (Green/red, plus or
minus, Go/No Go). Do NOT use these indicators.
 The alignment specifications programmed into your alignment machine that operate these indicators
may not be correct.
 This may result in an ERROR.
2. Some newer alignment machines are equipped with an optional “Rolling Compensation” method to “com-
pensate” the sensors (alignment targets or head units). Do NOT use this “Rolling Compensation”
method.
 Use the “Jacking Compensation” method. After installing the alignment targets or head units, raise the
vehicle and rotate the wheels 1/2 turn both ways.
 See Instructions in the alignment machine you are using for more information.
CAMBER INSPECTION

SE-6
< SYMPTOM DIAGNOSIS >
SQUEAK AND RATTLE TROUBLE DIAGNOSES
If possible, drive the vehicle with the customer until the noise is duplicated. Note any additional information on
the Diagnostic Worksheet regarding the conditions or location of the noise. This information can be used to
duplicate the same conditions when you confirm the repair.
If the noise can be duplicated easily during the test drive, to help identify the source of the noise, try to dupli-
cate the noise with the vehicle stopped by doing one or all of the following:
1) Close a door.
2) Tap or push/pull around the area where the noise appears to be coming from.
3) Rev the engine.
4) Use a floor jack to recreate vehicle “twist”.
5) At idle, apply engine load (electrical load, half-clutch on M/T model, drive position on A/T model).
6) Raise the vehicle on a hoist and hit a tire with a rubber hammer.
 Drive the vehicle and attempt to duplicate the conditions the customer states exist when the noise occurs.
 If it is difficult to duplicate the noise, drive the vehicle slowly on an undulating or rough road to stress the
vehicle body.
CHECK RELATED SERVICE BULLETINS
After verifying the customer concern or symptom, check ASIST for Technical Service Bulletins (TSBs) related
to that concern or symptom.
If a TSB relates to the symptom, follow the procedure to repair the noise.
LOCATE THE NOISE AND IDENTIFY THE ROOT CAUSE
1. Narrow down the noise to a general area.To help pinpoint the source of the noise, use a listening tool
(Chassis Ear: J-39570, Engine Ear: J-39565 and mechanic's stethoscope).
2. Narrow down the noise to a more specific area and identify the cause of the noise by:
 removing the components in the area that you suspect the noise is coming from.
Do not use too much force when removing clips and fasteners, otherwise clips and fasteners can be broken
or lost during the repair, resulting in the creation of new noise.
 tapping or pushing/pulling the component that you suspect is causing the noise.
Do not tap or push/pull the component with excessive force, otherwise the noise will be eliminated only tem-
porarily.
 feeling for a vibration with your hand by touching the component(s) that you suspect is (are) causing the
noise.
 placing a piece of paper between components that you suspect are causing the noise.
 looking for loose components and contact marks.
Refer to SE-7, "
Generic Squeak and Rattle Troubleshooting" .
REPAIR THE CAUSE
 If the cause is a loose component, tighten the component securely.
 If the cause is insufficient clearance between components:
- separate components by repositioning or loosening and retightening the component, if possible.
- insulate components with a suitable insulator such as urethane pads, foam blocks, felt cloth tape or urethane
tape. A NISSAN Squeak and Rattle Kit (J-43980) is available through your authorized NISSAN Parts Depart-
ment.
CAUTION:
Do not use excessive force as many components are constructed of plastic and may be damaged.
Always check with the Parts Department for the latest parts information.
The following materials are contained in the NISSAN Squeak and Rattle Kit (J-43980). Each item can be
ordered separately as needed.
URETHANE PADS [1.5 mm (0.059 in) thick]
Insulates connectors, harness, etc.
76268-9E005: 100×135 mm (3.94×5.31 in)/76884-71L01: 60×85 mm (2.36×3.35 in)/76884-71L02: 15×25
mm (0.59×0.98 in)
INSULATOR (Foam blocks)
Insulates components from contact. Can be used to fill space behind a panel.
73982-9E000: 45 mm (1.77 in) thick, 50×50 mm (1.97×1.97 in)/73982-50Y00: 10 mm (0.39 in) thick,
50×50 mm (1.97×1.97 in)
INSULATOR (Light foam block)
80845-71L00: 30 mm (1.18 in) thick, 30×50 mm (1.18×1.97 in)
FELT CLOTH TAPE
Used to insulate where movement does not occur. Ideal for instrument panel applications.

SEC-2
Description ..............................................................32
DTC Logic ...............................................................32
Diagnosis Procedure ..............................................32
B2194 ID DISCORD IMMU-I-KEY .....................33
Description ..............................................................33
DTC Logic ...............................................................33
Diagnosis Procedure ..............................................33
B2552 INTELLIGENT KEY ................................34
Description ..............................................................34
DTC Logic ...............................................................34
Diagnosis Procedure ..............................................34
Special Repair Requirement ...................................34
B2590 ID DISCORD BCM-I-KEY .......................35
Description ..............................................................35
DTC Logic ...............................................................35
Diagnosis Procedure ..............................................35
P1610 LOCK MODE ..........................................36
Description ..............................................................36
DTC Logic ...............................................................36
Diagnosis Procedure ..............................................36
POWER SUPPLY AND GROUND CIRCUIT .....37
INTELLIGENT KEY UNIT .........................................37
INTELLIGENT KEY UNIT : Diagnosis Procedure ...37
BCM ...........................................................................38
BCM : Diagnosis Procedure ...................................38
KEY SWITCH .....................................................39
Description ..............................................................39
Component Function Check ...................................39
Diagnosis Procedure ..............................................39
Component Inspection ............................................41
IGNITION KNOB SWITCH .................................42
Description ..............................................................42
Component Function Check ...................................42
Diagnosis Procedure ..............................................42
Component Inspection ............................................44
STOP LAMP SWITCH (A/T) ..............................45
Diagnosis Procedure ..............................................45
STOP LAMP SWITCH (M/T) ..............................47
Diagnosis Procedure ..............................................47
VEHICLE SECURITY INDICATOR ....................49
Description ..............................................................49
Component Function Check .................................49
Diagnosis Procedure ..............................................49
SECURITY SYSTEM PRE-WIRING ..................51
Wiring Diagram - SECURITY SYSTEM PRE-WIR-
ING - .......................................................................
51
ECU DIAGNOSIS ........................................54
BCM (BODY CONTROL MODULE) ..................54
Reference Value .....................................................54
Wiring Diagram - INTELLIGENT KEY SYSTEM/
ENGINE START FUNCTION - ................................
55
Wiring Diagram - NATS - ........................................63
Fail Safe .................................................................68
DTC Inspection Priority Chart ...............................69
DTC Index ..............................................................69
INTELLIGENT KEY UNIT ..................................71
Reference Value .....................................................71
Fail Safe .................................................................71
DTC Inspection Priority Chart ...............................71
DTC Index ..............................................................71
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) .................
73
Reference Value .....................................................73
Fail Safe .................................................................73
DTC Index ..............................................................74
SYMPTOM DIAGNOSIS ............................75
INTELLIGENT KEY SYSTEM/ENGINE
START FUNCTION SYMPTOMS ......................
75
Symptom Table .......................................................75
NATS (NISSAN ANTI-THEFT SYSTEM)
SYMPTOMS .......................................................
76
Symptom Table .......................................................76
ON-VEHICLE MAINTENANCE ..................77
PRE-INSPECTION FOR DIAGNOSTIC ............77
Basic Inspection ......................................................77
Vehicle Security Operation Check ..........................77
ON-VEHICLE REPAIR ...............................79
INTELLIGENT KEY UNIT ..................................79
Removal and Installation .........................................79
WITHOUT INTELLIGENT KEY SYSTEM
BASIC INSPECTION ..................................
80
DIAGNOSIS AND REPAIR WORKFLOW .........80
Work Flow ...............................................................80
INSPECTION AND ADJUSTMENT ...................83
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT ........................................................
83
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Special Repair Requirement .....
83
ECM RE-COMMUNICATING FUNCTION .................83
ECM RE-COMMUNICATING FUNCTION : De-
scription ...................................................................
83
ECM RE-COMMUNICATING FUNCTION : Spe-
cial Repair Requirement .........................................
83
FUNCTION DIAGNOSIS ............................84

SEC-3
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NATS (NISSAN ANTI-THEFT SYSTEM) ...........84
System Diagram ......................................................84
System Description .................................................84
Component Parts Location ......................................85
Component Description ..........................................86
DIAGNOSIS SYSTEM (BCM) ............................87
COMMON ITEM .........................................................87
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .....................................................
87
IMMU ..........................................................................87
IMMU : CONSULT-III Function (BCM - IMMU) .......87
THEFT ALM ...............................................................88
THEFT ALM : CONSULT-III Function (BCM -
THEFT ALM) ...........................................................
88
COMPONENT DIAGNOSIS .........................90
U1000 CAN COMM CIRCUIT .............................90
Description ..............................................................90
DTC Logic ...............................................................90
Diagnosis Procedure ...............................................90
U1010 CONTROL UNIT (CAN) ..........................91
DTC Logic ...............................................................91
Diagnosis Procedure ...............................................91
Special Repair Requirement ...................................91
B2190, P1614 NATS ANTENNA AMP. ..............92
Description ..............................................................92
DTC Logic ...............................................................92
Diagnosis Procedure ...............................................92
B2191, P1615 DIFFERENCE OF KEY ...............94
Description ..............................................................94
DTC Logic ...............................................................94
Diagnosis Procedure ...............................................94
B2192, P1611 ID DISCORD, IMMU-ECM ..........95
Description ..............................................................95
DTC Logic ...............................................................95
Diagnosis Procedure ...............................................95
B2193, P1612 CHAIN OF ECM-IMMU ...............97
Description ..............................................................97
DTC Logic ...............................................................97
Diagnosis Procedure ...............................................97
B2196 DONGLE NG ...........................................98
Description ...............................................................98
DTC Logic ................................................................98
Diagnosis Procedure ...............................................98
P1610 LOCK MODE .........................................99
Description ...............................................................99
DTC Logic ................................................................99
Diagnosis Procedure ...............................................99
POWER SUPPLY AND GROUND CIRCUIT ..100
BCM .........................................................................100
BCM : Diagnosis Procedure ..................................100
VEHICLE SECURITY INDICATOR .................101
Description .............................................................101
Component Function Check ................................101
Diagnosis Procedure .............................................101
SECURITY SYSTEM PRE-WIRING ................103
Wiring Diagram - SECURITY SYSTEM PRE-WIR-
ING - ......................................................................
103
ECU DIAGNOSIS .......................................106
BCM (BODY CONTROL MODULE) ...............106
Reference Value ....................................................106
Wiring Diagram - NATS - .......................................106
Fail Safe ................................................................111
DTC Inspection Priority Chart .............................113
DTC Index .............................................................113
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) ..............
114
Reference Value ....................................................114
Fail Safe ................................................................114
DTC Index .............................................................115
SYMPTOM DIAGNOSIS ............................116
VEHICLE SECURITY SYSTEM SYMPTOMS .116
Symptom Table .....................................................116
NATS (NISSAN ANTI-THEFT SYSTEM)
SYMPTOMS ....................................................
117
Symptom Table .....................................................117
ON-VEHICLE MAINTENANCE ..................118
PRE-INSPECTION FOR DIAGNOSTIC ..........118
Basic Inspection ....................................................118

SEC-18
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
DIAGNOSIS SYSTEM (INTELLIGENT KEY UNIT)
DIAGNOSIS SYSTEM (INTELLIGENT KEY UNIT)
CONSULT-III Function (INTELLIGENT KEY)INFOID:0000000001404049
APPLICATION ITEM
CONSULT-III performs the following functions via CAN communication with Intelligent Key unit.
WORK SUPPORT
SELF-DIAG RESULT
Refer to SEC-71, "DTCIndex".
DATA MONITOR
Diagnosis mode Function Description
WORK SUPPORT Changes the setting for each system function.
SELF-DIAG RESULTS Displays the diagnosis results judged by Intelligent Key unit.
CAN DIAG SUPPORT MNTR Monitors the reception status of CAN communication viewed from Intelligent Key unit.
DATA MONITOR The Intelligent Key unit input/output signals are displayed.
ACTIVE TEST The signals used to activate each device are forcibly supplied from Intelligent Key unit.
ECU IDENTIFICATION The Intelligent Key unit part number is displayed.
Support item Description Selection item Condition
CONFIRM KEY FOB IDIt can check whether Intelligent Key ID code
is registered or not.——
TAKE OUT FROM WINDOW WARNTake away warning chime (from window)
mode can be changed.ON Active
OFF Inactive
LOW BATT OF KEY FOB WARNIntelligent Key low battery warning mode can
be changed.ON Active
OFF Inactive
KEYLESS FUNCTIONDoor lock function with Intelligent Key can be
changed.ON Active
OFF Inactive
ANSWER BACK FUNCTION Buzzer reminder operation can be changed.ON Active
OFF Inactive
SELECTIVE UNLOCK FUNCTION Anti-hijack mode can be changed.ON Active
OFF Inactive
HAZARD ANSWER BACKHazard reminder operation mode can be
changed.Refer to XX-XX, "*****"
.
ANSWER BACK WITH I-KEY LOCKBuzzer reminder operation (lock operation)
mode by each door request switch can be
changed. BUZZER Active
OFF Inactive
ANSWER BACK WITH I-KEY UNLOCKBuzzer reminder operation (unlock operation)
mode by each door request switch can be
changed.BUZZER Active
OFF Inactive
AUTO RELOCK TIMERAuto door lock operation mode can be
changed.OFF Inactive
2 min Active
ENGINE START BY I-KEYEngine start function (by Intelligent Key)
mode can be changed. ON Active
OFF Inactive
LOCK/UNLOCK BY I-KEYDoor lock function by door request switch can
be changed. ON Active
OFF Inactive

SEC-26
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2190, P1614 NATS ANTENNA AMP.
B2190, P1614 NATS ANTENNA AMP.
DescriptionINFOID:0000000001404060
Performs ID verification through BCM and NATS antenna amplifier when ignition knob switch is pressed.
Prohibits the release of steering lock or start of engine when an unregistered ID of mechanical key is used.
DTC LogicINFOID:0000000001404061
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Insert mechanical key into the key cylinder.
2. Press the ignition knob switch.
3. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES >> Refer to XX-XX, "*****".
NO >> INSPECTION END.
Diagnosis ProcedureINFOID:0000000001532029
1.CHECK NATS ANTENNA AMP. INSTALLATION
Check NATS antenna amp. installation. Refer to XX-XX, "*****"
.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Reinstall NATS antenna amp. correctly.
2.CHECK NVIS (NATS) IGNITION KEY ID CHIP
Start engine with another registered NATS ignition key.
Does the engine start?
YES >>  Ignition key ID chip is malfunctioning.
 Replace the ignition key.
 Perform initialization with CONSULT-III.
For initialization, refer to “CONSULT-III Operation Manual”.
NO >> GO TO 3.
3.CHECK POWER SUPPLY FOR NATS ANTENNA AMP.
1. Turn ignition switch OFF.
2. Check voltage between NATS antenna amp. connector M21 terminal 1 and ground.
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
B2190
NATS ANTENNA
AMP Inactive communication between NATS antenna
amp. and BCM.
 Mechanical key is malfunctioning. Harness or connectors
(The NATS antenna amp. circuit is
open or shorted)
 Mechanical key
 NATS antenna amp.
BCM P1614

B2191, P1615 DIFFERENCE OF KEY
SEC-29
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
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B2191, P1615 DIFFERENCE OF KEY
DescriptionINFOID:0000000001404063
Performs ID verification through BCM when ignition knob switch is pressed.
Prohibits the release of steering lock or start of engine when an unregistered ID of mechanical key is used.
DTC LogicINFOID:0000000001404064
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Insert mechanical key into the key cylinder.
2. Press the ignition knob switch.
3. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES >> Refer toSEC-29, "Diagnosis Procedure".
NO >> INSPECTION END.
Diagnosis ProcedureINFOID:0000000001404065
1.PERFORM INITIALIZATION
Perform initialization with CONSULT-III. Re-register all mechanical keys.
For initialization and registration of mechanical key. Refer to CONSULT-III Operation Manual.
Can the system be initialized and can the engine be started with re-registered mechanical key?
YES >> Mechanical key was unregistered.
NO >> BCM is malfunctioning.
 Replace BCM. Refer to XX-XX, "*****"
.
 Perform initialization again
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
B2191
DIFFERENCE OF
KEYThe ID verification results between BCM and me-
chanical key are NG. The registration is necessary.Mechanical key
P1615

SEC-30
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2192, P1611 ID DISCORD, IMMU-ECM
B2192, P1611 ID DISCORD, IMMU-ECM
DescriptionINFOID:0000000001404066
BCM performs the ID verification with ECM that allows the engine to start. BCM starts the communication with
ECM if ignition switch is turned ON and starts the engine if the ID is OK. ECM prevents the engine from start-
ing if the ID is not registered.
DTC LogicINFOID:0000000001404067
DTC DETECTION LOGIC
NOTE:
 If DTC B2192 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
SEC-21, "
DTC Logic".
 If DTC B2192 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
SEC-22, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES >> Refer to SEC-30, "Diagnosis Procedure".
NO >> INSPECTION END.
Diagnosis ProcedureINFOID:0000000001404068
1.PERFORM INITIALIZATION
Perform initialization with CONSULT-III. Re-register all mechanical keys.
For initialization and registration of mechanical key. Refer to CONSULT-III Operation Manual.
Can the system be initialized and can the engine be started with re-registered mechanical key?
YES >> ID was unregistered.
NO >> GO TO 2.
2.PEPLACE BCM
1. Replace BCM. Refer to XX-XX, "*****"
.
2. Perform initialization with CONSULT-III. Re-register all mechanical keys.
For initialization and registration of mechanical key. Refer to CONSULT-III Operation Manual .
Can the system be initialized and can the engine be started with re-registered mechanical key?
YES >> BCM is malfunctioning.
NO >> GO TO 3.
3.PEPLACE ECM
1. Replace ECM. Refer to the following page.
- HR16DE (WITH EUR-OBD): XX-XX, "*****"
- HR16DE (WITHOUT EUR-OBD): XX-XX, "*****"
- MR18DE (WITH EURO-OBD): XX-XX, "*****"
- MR18DE (WITHOUT EURO-OBD): XX-XX, "*****"
-K9K: XX-XX, "*****"
2. Perform initialization with CONSULT-III. Re-register all mechanical keys.
For initialization and registration of mechanical key. Refer to CONSULT-III Operation Manual.
Can the system be initialized and can the engine be started with re-registered mechanical key?
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
B2192
ID DISCORD BCM-
ECMThe ID verification results between BCM and ECM
are NG. The registration is necessary.BCM
ECM
P1611

SEC-32
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2193, P1612 CHAIN OF ECM-IMMU
B2193, P1612 CHAIN OF ECM-IMMU
DescriptionINFOID:0000000001404069
BCM performs the ID verification with ECM that allows the engine to start. BCM starts the communication with
ECM if ignition switch is turned ON and starts the engine if the ID is OK. ECM prevents the engine from start-
ing if the ID is not registered.
DTC LogicINFOID:0000000001404070
DTC DETECTION LOGIC
NOTE:
 If DTC B2193 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
SEC-21, "
DTC Logic".
 If DTC B2193 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
SEC-22, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES >> Refer to SEC-32, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000001404071
1.REPLACE BCM
1. Replace BCM. Refer to XX-XX, "*****"
.
2. Perform initialization with CONSULT-III.
For initialization, refer to CONSULT-III Operation Manual.
Does the engine start?
YES >> BCM was malfunctioning.
NO >> ECM is malfunctioning.
 Replace ECM.
 Perform ECM re-communicating function.
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
B2193
CHAIN OF BCM-
ECMInactive communication between ECM and BCM Harness or connectors
(The CAN communication line is
open or short)
BCM
ECM P1612