Nissan X-Trail 32. Manual - part 74

BCS-12

< SYSTEM DESCRIPTION >

SYSTEM

BODY CONTROL SYSTEM : Fail-safe

INFOID:0000000011039000

FAIL-SAFE CONTROL BY DTC

BCM performs fail-safe control when any DTC are detected.

REAR WIPER MOTOR PROTECTION

BCM detects the rear wiper stopping position according to the rear wiper stop position signal.
When the rear wiper stop position signal does not change for more than 5 seconds while driving the rear
wiper, BCM stops power supply to protect the rear wiper motor.

Condition of cancellation

1.

More than 1 minute is passed after the rear wiper stop.

2.

Turn rear wiper switch OFF.

3.

Operate the rear wiper switch or rear washer switch.

FAIL-SAFE CONTROL BY RAIN SENSOR MALFUNCTION

BCM detects the rain sensor serial link error and the rain sensor malfunction.
BCM controls the following fail-safe when rain sensor has a malfunction.

Display contents of CONSULT

Fail-safe

B2190–00: CHAIN OF BCM-IMM ANT

Inhibit engine cranking

B2191–00: ID DISCORD, BCM-IMMANT

Inhibit engine cranking

B2192–00: ID DISCORD BCM-ECM

Inhibit engine cranking

B2193–00: CHAIN OF BCM-ECM

Inhibit engine cranking

B2195–00: ANTI-SCANNING

Inhibit engine cranking

B2196–00: DONGLE NG

Inhibit engine cranking

B2198–00: NATS ANTENNA AMP

Inhibit engine cranking

B2557–00: VEHICLE SPEED

Inhibit steering lock

B2602–00: SHIFT POSITION

Inhibit steering lock

B2604–00: PNP/CLUTCH SW

Inhibit steering lock

B2608–00: STARTER RELAY

Inhibit engine cranking

B260F–00: ENG STATE SIG LOST

Inhibit engine cranking

B26F1–00: IGN RELAY OFF

Inhibit engine cranking

B26F2–00: IGN RELAY ON

Inhibit engine cranking

B27D4–00: BCM - S/L SENSOR CIRCUIT

Inhibit steering unlock

B27D5–00: S/L SENSOR TEST OUTPUT

Inhibit steering unlock

B27D6–00: S/L CAN COMM CIRCUIT

Inhibit steering lock

B27D7–00: S/L PWR RELAY

Inhibit steering lock

B27D8–00: S/L VEHICLE SPEED MALFUNCTION

Inhibit steering lock

B27D9–00: S/L IGN MALFUNCTION

Inhibit steering lock/unlock

B27DA–00: IPDM CAN COMM CIRCUIT

Inhibit steering lock

B27DC–00: S/L POWER SUPPLY

Inhibit steering lock

B27DD–00: BCM - S/L ID DISCORD

Inhibit steering lock

B27DE–00: S/L MECHANICAL MALFUNCTION

Inhibit steering lock

B27DF–00: S/L HIGH LEVEL MALFUNCTION

Inhibit steering lock/unlock

B27E0–00: S/L LOW LEVEL MALFUNCTION

Inhibit steering lock

B27E1–00: S/L SAFETY CIRCUIT

Inhibit steering lock

B27E5–00: S/L IGN OFF POSITION

Inhibit steering lock

B27E6–00: S/L ANTI-SCAN MODE

Inhibit steering lock

B27E8–00: S/L UNDETERMINED LOCK POS

Inhibit steering lock

U0415: VEHICLE SPEED

Inhibit steering lock

BCS

SYSTEM

BCS-13

< SYSTEM DESCRIPTION >

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• Front wiper switch AUTO and sensing rain drop: The condition just before the activation of fail-safe is main-

tained until the front wiper switch is turned OFF.

• Front wiper switch AUTO and not sensing rain drop: Front wiper is LO operation until the front wiper switch is

turned off.

FAIL-SAFE CONTROL OF COMBINATION SWITCH READING FUNCTION CAUSED BY LOW
POWER SUPPLY VOLTAGE

If voltage of battery power supply lower, BCM maintains combination switch reading to the status when input
voltage is less than approximately 9 V.
NOTE:
When voltage of battery power supply is approximately 9 V or more, combination switch reading function
returns to normal operation.

COMBINATION SWITCH READING SYSTEM

COMBINATION SWITCH READING SYSTEM : System Description

INFOID:0000000010688578

SYSTEM DIAGRAM

OUTLINE

• BCM reads the status of the combination switch (light, turn signal, wiper and washer) and recognizes the

status of each switch.

• BCM has a combination of 5 output terminals (OUTPUT 1 - 5) and 5 input terminals (INPUT 1 - 5). It reads a

maximum of 20 switch status.

COMBINATION SWITCH MATRIX

JMMIA1753GB

BCS-14

< SYSTEM DESCRIPTION >

SYSTEM

Combination switch circuit

Combination switch INPUT-OUTPUT system list

COMBINATION SWITCH READING FUNCTION

Description

• BCM reads the status of the combination switch at 10 ms interval

normally.
NOTE:
BCM reads the status of the combination switch at 60 ms interval
when BCM is controlled at low power consumption control mode.

• BCM operates as follows and judges the status of the combination switch.
- It operates the transistor on OUTPUT side in the following order: OUTPUT 5 

→

 4 

→

 3 

→

 2 

→

 1, and outputs

voltage waveform.

- The voltage waveform of OUTPUT corresponding to the formed circuit is input into the interface on INPUT

side if any (1 or more) switches are ON.

System

OUTPUT 1

OUTPUT 2

OUTPUT 3

OUTPUT 4

OUTPUT 5

INPUT 1

—

HI BEAM

PASSING

RR FOG

FR FOG

INPUT 2

WIP VOLUME 1

—

HEADLAMP

AUTO LIGHT

TAIL LAMP

INPUT 3

FR WASHER

RR WASHER

—

TURN LH

TURN RH

INPUT 4

FR WIPER LO

FR WIPER HI

FR WIPER INT/AUTO

—

LIGHT OFF

INPUT 5

WIP VOLUME 2

WIP VOLUME 3

RR WIPER INT

RR WIPER ON

—

JMMIA1754GB

JMMIA1637GB

BCS

SYSTEM

BCS-15

< SYSTEM DESCRIPTION >

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- It reads this change of the voltage as the status signal of the combination switch.

Operation Example

In the following operation example, the combination of the status signals of the combination switch is replaced
as follows: INPUT 1 - 5 to “1 - 5” and OUTPUT 1 - 5 to “A - E”.

Example 1: When a switch (TURN RH switch) is turned ON

• The circuit between OUTPUT 5 and INPUT 3 is formed when the TURN RH switch is turned ON.

• BCM detects the combination switch status signal “3E” when the signal of OUTPUT 5 is input to INPUT 3.
• BCM judges that the TURN RH switch is ON when the signal “3E” is detected.

Example 2: When some switches (TURN RH switch, FR WASHER switch) are turned ON

JMMIA1757GB

JMMIA1755GB