EC Engine Control System NISSAN TIIDA 2007 Service Repair Manual

BCM (BODY CONTROL MODULE)
SEC-55
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Wiring Diagram - INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION -
INFOID:0000000001404122
ALKWA0089GB

BCM (BODY CONTROL MODULE)
SEC-69
< ECU DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
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REAR WIPER CONTROL
BCM detects a rear wiper stopping position according to a rear wiper auto stop signal.
When a rear wiper auto stop signal is in the condition listed below, BCM stops power supply to rear wiper after
rear wiper is activated for five seconds.
NOTE:
The above operation is repeated when operating the rear wiper switch one minute after the stop of the rear
wiper caused by Fail-safe.
TURN SIGNAL LAMP CONTROL
BCM detects the turn signal lamp circuit status from the terminal voltage.
BCM increases the turn signal lamp blinking speed if the bulb or harness open is detected with the turn signal
lamp operating.
NOTE:
The blinking speed is normal while activating the hazard warning lamp.
LIGHT & RAIN SENSOR MALFUNCTION DETECTION FUNCTION
BCM controls the following items when LIGHT & RAIN sensor has a malfunction.
Auto Light Control
Headlamp is turned ON.
Front Wiper Control
The condition just before the activation of Fail-safe is maintained until the front wiper switch is turned OFF.
DTC Inspection Priority ChartINFOID:0000000001404126
DTC IndexINFOID:0000000001404127
NOTE:
Details of time display
 CRNT: Displays when there is a malfunction now or after returning to the normal condition until turning igni-
tion switch OFF → ON again.
Display contents of CONSULT Fail-safe Cancellation
B2190: NATS ANTENNA AMP Inhibits engine cranking
 Inhibits steering lock unlocking (Intelligent Key unit)
Fuel cut (ECM)Erase DTC
B2191: DIFFERENCE OF KEY Inhibits engine cranking
 Inhibits steering lock unlocking (Intelligent Key unit)
Fuel cut (ECM)Erase DTC
B2192: ID DISCORD BCM-ECM Fuel cut (ECM) Erase DTC
B2193: CHAIN OF BCM-ECM Fuel cut (ECM) Erase DTC
B2194: DISCORD BCM-I-KEY Inhibits engine cranking
 Inhibits steering lock unlocking (Intelligent Key unit)
Fuel cut (ECM)Erase DTC
Ignition switch Rear wiper switch Auto stop signal
ONOFFRear wiper stop position signal cannot be
input 5 seconds.
ON The signal does not change for 5 seconds.
Priority DTC
1 U1000: CAN COMM CIRCUIT
 U1010: CONTROL UNIT (CAN)
2 B2190: NATS ANTENNA AMP
 B2191: DIFFERNCE OF KEY
 B2192: ID DISCORD BCM-ECM
 B2193: CHAIN OF BCM-ECM
 B2194: DISCORD BCM-I-KEY

INTELLIGENT KEY UNIT
SEC-71
< ECU DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
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INTELLIGENT KEY UNIT
Reference ValueINFOID:0000000001404128
For LHD vehicles, refer to DLK-381, "Reference Value".
For RHD vehicles, refer to DLK-151, "
Reference Value".
Fail SafeINFOID:0000000001404132
DTC Inspection Priority ChartINFOID:0000000001404133
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
DTC IndexINFOID:0000000001404134
NOTE:
Details of time display
 CRNT: Displays when there is a malfunction now or after returning to the normal condition until turning igni-
tion switch OFF → ON again.
 1 - 39: Displayed if any previous malfunction is present when current condition is normal. It increases like 1
→ 2 → 3...38 → 39 after returning to the normal condition whenever ignition switch OFF → ON. The counter
remains at 39 even if the number of cycles exceeds it. It is counted from 1 again when turning ignition switch
OFF → ON after returning to the normal condition if the malfunction is detected again.
Display contents of CONSULT-III Fail-safe Cancellation
B2013: STRG COMM 1  Inhibits steering look unlocking Erase DTC
B2552: INTELLIGENT KEY Inhibits steering look unlocking
 Inhibits engine cranking
(BCM)
Fuel cut
(ECM)Erase DTC
B2590: NATS MALFUNCTION Inhibits steering look unlocking
 Inhibits engine cranking
(BCM)
Fuel cut
(ECM)Erase DTC
Priority DTC
1 U1000: CAN COMM CIRCUIT
 U1010: CONTROL UNIT (CAN)
 B2552: INTELIGENT KEY
2 B2013: STRG COMM 1
 B2590: NATS MALFUNCTION
CONSULT display Detection condition Fail-safe Diagnosis
No DTC is detected.
further testing
may be required.———
U1000: CAN COMM CIRCUITIntelligent Key unit cannot receive CAN communi-
cation signal continuously for 2 seconds or more.—Check CAN communi-
cation system.
Refer to SEC-21
U1010: CONTROL UNIT (CAN)Intelligent Key unit detects internal CAN communi-
cation circuit malfunction.—Replace Intelligent Key
unit.
B2013: STRG COMM 1The ID verification result between Intelligent key
unit and steering lock unit are NG. Or Intelligent Key
unit cannot communicate with steering lock unit.×Perform steering lock
unit ID registration with
CONSULT-III

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
SEC-73
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IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE
ROOM)
Reference ValueINFOID:0000000001404135
Refer to IPDM E/R.
Fail SafeINFOID:0000000001404139
CAN communication control
When CAN communication with ECM and BCM is impossible, IPDM E/R performs fail-safe control. After CAN
communication recovers normally, it also returns to normal control.
If no CAN communication is available with ECM
*1: HR engine models
*2: MR engine and K9K engine models
If no CAN communication is available with BCM
Ignition relay malfunction detection function
 IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it.
 IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation
coil circuit.
 If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to
alert the user to the ignition relay malfunction when the ignition switch is turned OFF.
Control part Fail-safe in operation
Cooling fan The cooling fan relay-2*
1 or the cooling fan relay-3*2 turns ON when the ignition switch
is turned ON
 Turns off the fan motor low relay when the ignition switch is turned OFF
A/C compressor A/C relay OFF
Control part Fail-safe in operation
Headlamp The headlamp low relay turns ON when the ignition switch is turned ON
 The headlamp low relay turns OFF when the ignition switch is turned OFF
 Headlamp high relay OFF
Parking lamps
 License plate lamps
 Tail lamps
 Illuminations The tail lamp relay turns ON when the ignition switch is turned ON
 The tail lamp relay turns OFF when the ignition switch is turned OFF
Front wiper The status just before activation of fail-safe control is maintained until the ignition
switch is turned OFF while the front wiper is operating at LO or HI speed.
 The front wiper is operated at LO speed until the ignition switch is turned OFF if the
fail-safe control is activated while the front wiper is set in the INT mode and the front
wiper motor is operating.
Front fog lamps Front fog lamp relay OFF
Starter motor Inhibit relay OFF
Rear window defogger Rear window defogger relay OFF
Headlamp washer Headlamp washer relay OFF
PTC heater PTC heater relay OFF
DTC Ignition switch Ignition relay Tail lamp relay
—ONON—
—OFFOFF—
B2098: IGN RLY ON OFF ON ON (10 minutes)
B2099: IGN RLY OFF ON OFF —

SEC-74
< ECU DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
NOTE:
The tail lamp relay is turned OFF when the ignition switch is turned ON.
Front wiper control
IPDM E/R detects the front wiper stop position with the front wiper auto stop signal.
When the front wiper auto stop signal is in the conditions listed below, IPDM E/R repeats a front wiper 10 sec-
onds operation and 20 seconds stop five times.
NOTE:
This operation status can be confirmed on the IPDM E/R “Data Monitor” that displays “BLOCK” for the item
“WIP PROT” while the wiper is stopped.
DTC IndexINFOID:0000000001404140
NOTE:
The details of time display are as follows.
 CRNT: The malfunctions that are detected now.
 PAST: The number is indicated when it is normal at present and a malfunction was detected in the past.Ignition switch Front wiper switch Front wiper auto stop signal
ONOFFThe front wiper auto stop signal (stop posi-
tion) cannot be input for 10 seconds.
ONThe front wiper auto stop signal does not
change for 10 seconds.
CONSULT display Fail-safe
TimingNOTEReference page
No DTC is detected.
further testing
may be required.————
U1000: CAN COMM CIRCUIT×CRNT PASTXX-XX, "*****"
B2098: IGN RELAY ON×CRNT PASTXX-XX, "*****"
B2099: IGN RELAY OFF — CRNT PASTXX-XX, "*****"
B2100: EEPROM — CRNT PASTXX-XX, "*****"

PRE-INSPECTION FOR DIAGNOSTIC
SEC-77
< ON-VEHICLE MAINTENANCE >[WITH INTELLIGENT KEY SYSTEM]
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ON-VEHICLE MAINTENANCE
PRE-INSPECTION FOR DIAGNOSTIC
Basic InspectionINFOID:0000000001404144
The engine start function, door lock function, and NATS in the Intelligent Key system are closely related to
each other regarding control. Narrow down the functional area in question by performing basic inspection to
identify which function is malfunctioning. The vehicle security function can operate only when the door lock is
operating normally. Therefore, it is easy to identify any factor unique to the vehicle security system by perform-
ing the vehicle security operation check after basic inspection.
1.CHECK DOOR LOCK OPERATION
Check the door lock for normal operation with the Intelligent Key and door request switch.
Successful door lock operation with the Intelligent Key and request switch indicates that the remote keyless
entry receiver and inside key antenna required for engine start are functioning normally.
Identify the malfunctioning point by referring to the DLK section if the door cannot be unlocked.
Can the door be locked with the Intelligent Key and door request switch?
YES >> GO TO 2.
NO >> Refer to XX-XX, "*****"
.
2.CHECK IGNITION KNOB SWITCH OPERATION-1
With all registered Intelligent Keys, check if ignition knob can rotate when carrying Intelligent Key inside the
vehicle.
Does ignition knob rotate?
YES >> GO TO 3.
NO >> Refer to SEC-76, "
Symptom Table".
3.CHECK IGNITION KNOB SWITCH OPERATION-2
Insert registered mechanical key into key cylinder, and check if ignition knob can rotate. Check for all regis-
tered mechanical keys.
Does ignition knob rotate?
YES >> GO TO 4.
NO (Does not rotate with some of mechanical keys)>>Perform mechanical key registration.
NO (Does not rotate with all mechanical keys)>>Refer to SEC-76, "
Symptom Table".
4.CHECK VEHICLE SECURITY SYSTEM
Check the vehicle security system for normal operation.
The vehicle security function can operate only when the door lock function is operating normally.
Therefore, it is easy to identify any factor unique to the vehicle security by performing the vehicle security
operation check after this basic inspection.
>> Go to SEC-77, "
Vehicle Security Operation Check".
Vehicle Security Operation CheckINFOID:0000000001404145
1.INSPECTION START
Turn ignition switch “OFF” and pull out mechanical key from key cylinder.
NOTE:
Before starting operation check, open front windows.
>> GO TO 2.
2.CHECK SECURITY INDICATOR LAMP
1. Lock doors using Intelligent Key.
2. Check that security indicator lamp illuminates for 30 seconds.
Security indicator lamp should illuminate.
OK >> GO TO 3.

INSPECTION AND ADJUSTMENT
SEC-83
< BASIC INSPECTION >[WITHOUT INTELLIGENT KEY SYSTEM]
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INSPECTION AND ADJUSTMENT
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Re-
quirement
INFOID:0000000001404154
Refer to the CONSULT-III Operation Manual-NATS.
ECM RE-COMMUNICATING FUNCTION
ECM RE-COMMUNICATING FUNCTION : DescriptionINFOID:0000000001404155
Performing following procedure can automatically perform re-communication of ECM and BCM, but only when
the ECM has been replaced with a new one (*1).
*1: New one means an ECM which has never been energized on-board.
(In this step, initialization procedure by CONSULT-III is not necessary)
NOTE:
When registering new Key IDs or replacing the ECM that is not brand new, refer to CONSULT-III Oper-
ation Manual.
If multiple keys are attached to the key holder, separate them before work.
Distinguish keys with unregistered key ID from those with registered ID.
ECM RE-COMMUNICATING FUNCTION : Special Repair RequirementINFOID:0000000001404156
1.PERFORM ECM RE-COMMUNICATING FUNCTION
1. Install ECM.
2. Using a registered key (*2), turn ignition switch to “ON”.
*2: To perform this step, use the key that has been used before performing ECM replacement.
3. Maintain ignition switch in “ON” position for at least 5 seconds.
4. Turn ignition switch to “OFF”.
5. Start engine.
Can engine be started?
YES >> Procedure is completed.
NO >> Initialize control unit. Refer to CONSULT-III Operation Manual NATS.

SEC-84
< FUNCTION DIAGNOSIS >[WITHOUT INTELLIGENT KEY SYSTEM]
NATS (NISSAN ANTI-THEFT SYSTEM)
FUNCTION DIAGNOSIS
NATS (NISSAN ANTI-THEFT SYSTEM)
System DiagramINFOID:0000000001404157
System DescriptionINFOID:0000000001404158
INPUT/OUTPUT SIGNAL CHART
BCM
SYSTEM DESCRIPTION
NATS (Nissan Anti-Theft System) has the following immobilizer functions:
 Engine immobilizer shows high anti-theft performance to prevent engine start by other than the owner.
 Only a key with key ID registered in BCM and ECM can start engine, and shows high anti-theft performance
to prevent key from being copied or stolen.
 Security indicator always flashes with mechanical key removed condition (key switch: OFF).
 Therefore, NATS warns outsiders that the vehicle is equipped with the anti-theft system. Refer to XX-XX,
"*****".
 If system detects malfunction, security indicator illuminate when ignition switch is turned to ON position.
 If the owner requires, ignition key ID can be registered for up to 5 keys.
 During trouble diagnosis or when the following parts have been replaced, and if ignition key is added, regis-
tration* is required.
*1: All keys kept by the owner of the vehicle should be registered with ignition key.
-ECM
-BCM
- Ignition key
- ABS actuator control unit
- EPS sontrol unit
- IPDM E/R
- Combination meter
 NATS trouble diagnosis, system initialization and additional registration of other Ignition key IDs must be car-
ried out using CONSULT-III hardware and SECURITY CARD.
When NATS initialization has been completed, the ID of the inserted ignition key or ignition key IDs can be
carried out.
PIIA1121E
Switch/Input signal Input signal to BCM BCM function Actuator/Output signal
NATS antenna amp. Key ID
NATS Security indicator lamp
 Starter request
ECM Engine status signal

SEC-98
< COMPONENT DIAGNOSIS >[WITHOUT INTELLIGENT KEY SYSTEM]
B2196 DONGLE NG
B2196 DONGLE NG
DescriptionINFOID:0000000001404189
BCM performs the ID verification with the slave control units (ECM, ABS actuator, EPS column assy, IPDM E/
R, combination meter).
If either slave control unit is replaced by used part, perform initialization with CONSULT-III. But if the control
unit is replaced by new part, the system does not need initialization.
DTC LogicINFOID:0000000001404190
DTC DETECTION LOGIC
NOTE:
 If DTC B2196 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
SEC-90, "
DTC Logic".
 If DTC B2196 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
SEC-91, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check “Self Diagnostic Result” with CONSULT-III.
Is the DTC detected?
YES >> Refer to SEC-98, "Diagnosis Procedure".
NO >> INSPECTION END.
Diagnosis ProcedureINFOID:0000000001404191
1.PERFORM INITIALIZATION
1. Perform initialization with CONSULT-III. Re-register all ignition keys. Refer to “SEC-87, "
COMMON ITEM :
CONSULT-III Function (BCM - COMMON ITEM)"”.
2. Start the engine.
Dose the engine start?
YES >> INSPECTION END
NO >> Perform “Self Diagnosis Result” for each control unit.
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
B2196 DONGLE NGThe ID verification results between BCM
and each slave control unit are NG.ECM
 ABS actuator assy
 EPS column assy
 Combination meter
IPDM E/R

SEC-112
< ECU DIAGNOSIS >[WITHOUT INTELLIGENT KEY SYSTEM]
BCM (BODY CONTROL MODULE)
REAR WIPER CONTROL
BCM detects a rear wiper stopping position according to a rear wiper auto stop signal.
When a rear wiper auto stop signal is in the condition listed below, BCM stops power supply to rear wiper after
rear wiper is activated for five seconds.
NOTE:
The above operation is repeated when operating the rear wiper switch one minute after the stop of the rear
wiper caused by Fail-safe.
TURN SIGNAL LAMP CONTROL
BCM detects the turn signal lamp circuit status from the terminal voltage.
BCM increases the turn signal lamp blinking speed if the bulb or harness open is detected with the turn signal
lamp operating.
NOTE:
The blinking speed is normal while activating the hazard warning lamp.
LIGHT & RAIN SENSOR MALFUNCTION DETECTION FUNCTION
BCM controls the following items when LIGHT & RAIN sensor has a malfunction.
Auto Light Control
Headlamp is turned ON.
Front Wiper Control
The condition just before the activation of Fail-safe is maintained until the front wiper switch is turned OFF.
Display contents of CONSULT Fail-safe Cancellation
B2190: NATS ANTENNA AMP Inhibits engine cranking
 Inhibits steering lock unlocking (Intelligent Key unit)
Fuel cut (ECM)Erase DTC
B2191: DIFFERENCE OF KEY Inhibits engine cranking
 Inhibits steering lock unlocking (Intelligent Key unit)
Fuel cut (ECM)Erase DTC
B2192: ID DISCORD BCM-ECM Fuel cut (ECM) Erase DTC
B2193: CHAIN OF BCM-ECM Fuel cut (ECM) Erase DTC
B2194: DISCORD BCM-I-KEY Inhibits engine cranking
 Inhibits steering lock unlocking (Intelligent Key unit)
Fuel cut (ECM)Erase DTC
B2195: ANTI SCANNING Inhibits engine cranking
 Inhibits steering lock unlocking (Intelligent Key unit)
Fuel cut (ECM)Erase DTC
B2196: DONGLE NG Inhibits engine cranking
 Inhibits steering lock unlocking (Intelligent Key unit)
Fuel cut (ECM)Erase DTC
Ignition switch Rear wiper switch Auto stop signal
ONOFFRear wiper stop position signal cannot be
input 5 seconds.
ON The signal does not change for 5 seconds.