Body Control System: Other Nissan Versa I

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"

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 SUPPLEMENTAL RESTRAINT SYSTEM and SEAT BELTS articles.

BCM FUNCTION

BCM has a combination switch reading function for reading the operation of combination switches (light, wiper, washer, turn signal) in addition to the function for controlling the operation of various electrical components. Also, it functions as an interface that receives signals from the front air control, and sends signals to ECM using CAN communication.

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1. Description BCM reads combination switch (light, wiper) status, and controls various electrical components according to the results. BCM reads information of a maximum of 20 switches by combining five output terminals (OUTPUT 1-5) and five input terminals (INPUT 1-5).
2. Operation description BCM activates transistors of output terminals (OUTPUT 1-5) periodically and allows current to flow in turn. If any (1 or more) of the switches are turned ON, circuit of output terminals (OUTPUT 1-5) and input terminals (INPUT 1-5) becomes active. At this time, transistors of output terminals (OUTPUT 1-5) are activated to allow current to flow. When voltage of input terminals (INPUT 1-5) corresponding to that switch changes, interface in BCM detects voltage change and BCM determines that switch is ON.
3. BCM - Operation table of combination switch BCM reads operation status of combination switch by the combination shown in the following table. NOTE: Headlamp has a dual system switch.
4. Example operation: (When lighting switch 1st position is turned ON) When lighting switch 1st position is turned ON, contact in combination switch turns ON. At this time if OUTPUT 4 transistor is activated, BCM detects that voltage changes in INPUT 5. When OUTPUT 4 transistor is ON, BCM detects that voltage changes in INPUT 5, and judges lighting switch 1st position is ON. Then BCM sends tail lamp ON signal to IPDM E/R using CAN communication. When OUTPUT 4 transistor is activated again, BCM detects that voltage changes in INPUT 5 and recognizes that lighting switch 1st position is continuously ON. NOTE: Each OUTPUT terminal transistor is activated at 10ms intervals. Therefore, after a switch is turned ON, electrical loads are activated with a time delay. But this time delay is so short that it cannot be noticed.
5. Operation mode Combination switch reading function has operation modes as follows: Normal status When BCM is not in sleep status, OUTPUT terminals (1-5) each turn ON-OFF every 10ms. Sleep status When BCM is in sleep mode, transistors of OUTPUT 1 and 5 stop the output, and BCM enters low-current-consumption mode. OUTPUTS (2, 3, and 4) turn ON-OFF at 60ms intervals, and receives lighting switch input only.

CAN COMMUNICATION CONTROL

CAN communication allows a high rate of information through the two communication lines (CAN-L, CAN-H) connecting the various control units in the system. Each control unit transmits/receives data, but selectively reads required data only.

BCM STATUS CONTROL

BCM changes its status depending on the operation status in order to save power consumption.

1. CAN communication status With ignition switch ON, CAN communicates with other control units normally. Control by BCM is being operated properly. When ignition switch is OFF, switching to sleep mode is possible. Even when ignition switch is OFF, if CAN communication with IPDM E/R and combination meter is active, CAN communication status is active.
2. Sleep transient status This status shuts down CAN communication when ignition switch is turned OFF. It transmits sleep request signal to IPDM E/R and combination meter. Two seconds after CAN communication of all control units stops, CAN communication switches to inactive status.
3. CAN communication inactive status With ignition switch OFF, CAN communication is not active. With ignition switch OFF, control performed only by BCM is active. Three seconds after CAN communication of all control units stops, CAN communication switches to inactive status.
4. Sleep status BCM is activated with low current consumption mode. CAN communication is not active. When CAN communication operation is detected, it switches to CAN communication status. When a state of the following switches changes, it switches to CAN communication state: Ignition switch Key switch (without Intelligent Key) Key switch and ignition knob switch (with Intelligent Key) Hazard switch Door lock/unlock switch Front door switch (LH, RH) Rear door switch (LH, RH) Back door lock assembly (Hatchback) Trunk lamp switch and trunk release solenoid (Sedan) Combination switch (passing, lighting switch 1st position, front fog lamp) Keyfob (lock/unlock signal) Front door key cylinder switch LH When control performed only by BCM is required by switch, it shifts to CAN communication inactive mode. Status of combination switch reading function is changed.

SYSTEMS CONTROLLED BY BCM DIRECTLY

1. Power door lock system. Refer to " «POWER DOOR LOCK SYSTEM»(ref-319465-S08483850122009062600000) ".
2. Remote keyless entry system. Refer to " «REMOTE KEYLESS ENTRY SYSTEM»(ref-319465-S27904815222009062600000) ".
3. Power window system. Refer to " «POWER WINDOW SYSTEM»(ref-337644-S28458010552009080600000) ". NOTE
4. Sunroof system. Refer to " «SUNROOF»(ref-337645-S01132613592009080600000) ". NOTE
5. Room lamp timer. Refer to " «INTERIOR ROOM LAMP»(ref-337636-S02898902372009080600000) ".
6. Rear wiper and washer system. Refer to " «REAR WIPER AND WASHER SYSTEM»(ref-337637-S05566571722009080600000) ".

Note. Power supply only. No system control.

SYSTEMS CONTROLLED BY BCM AND IPDM E/R

1. Panic system. Refer to " «REMOTE KEYLESS ENTRY SYSTEM»(ref-319465-S27904815222009062600000) ".
2. Vehicle security (theft warning) system. Refer to " «VEHICLE SECURITY (THEFT WARNING) SYSTEM»(ref-319465-S15537041702009062600000) ".
3. NVIS (NATS) system. Refer to " «NATS (NISSAN ANTI-THEFT SYSTEM)»(ref-319465-S29685046052009062600000) ".
4. Headlamp, tail lamp and battery saver control systems. Refer to " «PARKING, LICENSE PLATE AND TAIL LAMPS»(ref-337636-S20505847512009080600000) ", " «HEADLAMP (FOR USA)»(ref-337636-S25506969802009080600000) " or " «HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM»(ref-337636-S40274220712009080600000) ".
5. Front fog lamp. Refer to " «FRONT FOG LAMP»(ref-337636-S03972759652009080600000) ".
6. Front wiper and washer system. Refer to " «FRONT WIPER AND WASHER SYSTEM»(ref-337637-S21232860892009080600000) ".
7. Rear window defogger system. Refer to " «REAR WINDOW DEFOGGER»(ref-337644-S17430711712009080600000) ".

SYSTEMS CONTROLLED BY BCM AND COMBINATION METER

1. Warning chime. Refer to " «WARNING CHIME»(ref-337635-S40820839632009080600000) ".
2. Turn signal and hazard warning lamps. Refer to " «TURN SIGNAL AND HAZARD WARNING LAMPS»(ref-337636-S03775445522009080600000) ".

SYSTEMS CONTROLLED BY BCM AND INTELLIGENT KEY UNIT

1. Intelligent Key system. Refer to " «INTELLIGENT KEY SYSTEM»(ref-319465-S28959895392009062600000) ".

MAJOR COMPONENTS AND CONTROL SYSTEM

MAJOR COMPONENTS AND CONTROL SYSTEM

Terminals and Reference Values for BCM

TERMINALS AND REFERENCE VALUES FOR BCM Terminal Wire color Signal name Signal input/output Measuring condition Reference value or waveform (Approx.) Ignition switch Operation or condition 2 BR Combination switch input 5 Input ON Lighting, turn, wiper OFF Wiper dial position 4 3 GR Combination switch input 4 Input ON Lighting, turn, wiper OFF Wiper dial position 4 4 L Combination switch input 3 Input ON Lighting, turn, wiper OFF Wiper dial position 4 5 G Combination switch input 2 Input ON Lighting, turn, wiper OFF Wiper dial position 4 6 V Combination switch input 1 7 BR Front door key cylinder switch LH (unlock) Input OFF ON (open, 2nd turn) Momentary 1.5V OFF (closed) 0V 8 Y Front door key cylinder switch LH (lock) Input On (open) Momentary 1.5V OFF (closed) 0V 9 W Rear window defogger switch Input ON Rear window defogger switch ON 0V Rear window defogger switch OFF 5V 11 L Ignition switch (ACC or ON) Input ACC or ON Ignition switch ACC or ON Battery voltage 12 SB Front door switch RH Input OFF ON (open) 0V OFF (closed) Battery voltage 13 GR Rear door switch RH Input OFF ON (open) 0V OFF (closed) Battery voltage 15 W Tire pressure warning check connector Input OFF - 5V 18 V Remote keyless entry receiver (ground) Output OFF - 0V 19 BR Remote keyless entry receiver (power supply) Output OFF Ignition switch OFF 20 G Remote keyless entry receiver signal (signal) Input OFF Stand-by (keyfob buttons released) When remote keyless entry receiver receives signal from keyfob (keyfob buttons pressed) 21 P NATS antenna amp. Input/Output OFF --> ON Ignition switch (OFF --> ON) Just after turning ignition switch ON: Pointer of tester should move for approx. 1 second, then return to battery voltage. 23 R Security indicator lamp Output OFF Goes OFF --> illuminates (Every 2.4 seconds) Battery voltage --> 0V 25 LG NATS antenna amp. Input/Output OFF --> ON Ignition switch (OFF --> ON) Just after turning ignition switch ON: Pointer of tester should move for approx. 1 second, then return to battery voltage. 26 GR Thermo control amp. Input ON A/C switch ON 27 O Compressor ON signal Input ON A/C switch OFF 5V A/C switch ON 0V 28 P Front blower monitor Input ON Front blower motor OFF Battery voltage Front blower motor ON 0V 29 L Hazard switch Input OFF ON 0V OFF 5V 30 (1) V Back door/trunk output Output - Back door open (switch closed) 0V Back door closed (switch open) 5V 30 (2) V Back door opener switch Input - All doors locked (SW OFF) Battery voltage All doors unlocked (SW ON) 0V 30 (3) V Trunk lid opener switch Input - All doors locked (SW OFF) Battery voltage All doors unlocked (SW ON) 0V 32 LG Combination switch output 5 Output ON Lighting, turn, wiper OFF Wiper dial position 4 33 Y Combination switch output 4 Output ON Lighting, turn, wiper OFF Wiper dial position 4 34 V Combination switch output 3 Output ON Lighting, turn, wiper OFF Wiper dial position 4 35 R Combination switch output 2 Output ON Lighting, turn, wiper OFF Wiper dial position 4 36 P Combination switch output 1 37 G Key switch Input OFF Key inserted Battery voltage Key removed 0V 38 W Ignition switch (ON) Input ON - Battery voltage 39 L CAN-H - - - - 40 P CAN-L - - - - 42 Y Trunk lamp switch Input OFF ON (trunk open) 0V OFF (trunk closed) Battery voltage 43 R Back door switch Input OFF ON (open) 0V OFF (closed) Battery voltage 44 LG Rear wiper auto stop Input ON Rear wiper operating 0 Rear wiper stopped Battery 45 GR Lock switch Input OFF ON (lock) 0V OFF Battery voltage 46 L Unlock switch Input OFF ON (unlock) 0V OFF Battery voltage 47 BR Front door switch LH Input OFF ON (open) 0V OFF (closed) Battery voltage 48 O Rear door switch LH Input OFF ON (open) 0V OFF (closed) Battery voltage 49 P Luggage room lamp Output OFF Any door open (ON) 0V All doors closed (OFF) Battery voltage 50 SB A/C indicator Output ON A/C OFF 0 A/C ON Battery voltage 53 (4) R Back door lock assembly (actuator) Output OFF Back door (open) Battery voltage 53 (5) R Trunk lamp switch and trunk release solenoid Output OFF Trunk lid (open) Battery voltage 55 V Rear wiper motor output Output ON OFF 0 ON Battery voltage 56 R Battery saver output Output OFF 30 minutes after ignition switch is turned OFF 0V ON - Battery voltage 57 LG Battery power supply Input OFF - Battery voltage 59 G Front door lock actuator LH (unlock) Output OF OFF (neutral) 0V ON (unlock) Battery voltage 60 V Turn signal (left) Output ON Turn left ON 61 W Turn signal (right) Output ON Turn right ON 63 BR Interior room lamp Output OFF Any door switch ON (open) 0V OFF (closed) Battery voltage 65 SB All door lock actuators (lock) Output OFF OFF (neutral) 0V ON (lock) Battery voltage 66 G Front door lock actuator RH, rear door lock actuators LH/RH (unlock) Output OFF OFF (neutral) 0V ON (unlock) Battery voltage 67 B Ground Input ON - 0V 68 L Power window power supply (RAP) Output - Ignition switch ON Battery voltage Within 45 seconds after ignition switch OFF Battery voltage More than 45 seconds after ignition switch OFF 0V When front door LH or RH is open or power window timer operates 0V 69 P Battery power supply Output OFF - Battery voltage 70 Y Battery power supply Input OFF - Battery voltage (1) With Intelligent Key (2) Hatchback without Intelligent Key (3) Sedan without Intelligent Key (4) Hatchback (5) Sedan

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1. CHECK FUSES AND FUSIBLE LINK Check 40A fusible link (letter g , located in the fuse and fusible link box). Check 10A fuses [No. 6, 8 and 20, located in the fuse block (J/B)]. OK or NG OK >> GO TO 2. NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to " «POWER SUPPLY ROUTING CIRCUIT»(ref-337618-S12320956552009080600000) ".
2. CHECK BCM POWER SUPPLY CIRCUIT Turn ignition switch OFF. Disconnect BCM. Check voltage between BCM connectors and ground. TERMINALS VOLTAGE CHART Connector Terminals Power source Condition Voltage (V) (Approx.) (+) (-) M18 11 Ground ACC power supply Ignition switch ACC or ON Battery voltage 38 Ground Ignition power supply Ignition switch ON or START Battery voltage M20 57 Ground Battery power supply Ignition switch OFF Battery voltage 70 Ground Battery power supply Ignition switch OFF Battery voltage OK or NG OK >> GO TO 3. NG >> Repair or replace the harness.
3. CHECK GROUND CIRCUIT Check continuity between BCM connector M20 terminal 67 and ground. 67 - Ground: Continuity should exist. OK or NG OK >> Power supply and ground circuit is OK. NG >> Repair or replace harness.

CONSULT-III Function (BCM)

CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.

CONSULT-III FUNCTION CHART

CONSULT-III START PROCEDURE

Refer to " CONSULT-III START PROCEDURE ".

ITEMS OF EACH PART

Note. CONSULT-III will only display systems the vehicle possesses.

CONSULT-III FUNCTION CHART

Display Item List

DISPLAY ITEM LIST