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ac8wzw00004278
FRONT BODY CONTROL MODULE (FBCM) INSPECTION
id094000002100
1. Remove the fuse box cover. (See RELAY AND FUSE BLOCK REMOVAL/INSTALLATION.)
2. Remove the front body control module (FBCM) from the fuse box. (See FRONT BODY CONTROL MODULE (FBCM) REMOVAL/INSTALLATION.)
3. Verify that the voltages of each of the terminals are as indicated in the Terminal Voltage Table (Reference).
Terminal Voltage Table (Reference)
ac8wzw00004278
|
|
Terminal |
Signal |
Connected to |
Measurement conditions |
Voltage (V) |
Inspection item(s) |
|
|---|---|---|---|---|---|---|
|
1A
|
Power supply
|
HAZARD 25 A fuse
|
Under any condition
|
B+
|
• HAZARD 25 A fuse
• Related wiring harness
|
|
|
1B
|
Power supply
|
HAZARD 25 A fuse
|
Under any condition
|
B+
|
• HAZARD 25 A fuse
• Related wiring harness
|
|
|
1C
|
Ignition power supply
|
• Front seat warmer control unit
• Rear seat warmer control unit
• A/C relay
• Front climate control unit
• Rear climate control unit
|
Ignition switched ON (engine off)
|
B+
|
• Front climate control unit
• Rear climate control unit
• Front body control module (FBCM)
• Front seat warmer control unit
• Rear seat warmer control unit
• A/C relay
• Related wiring harness
|
|
|
Ignition switched OFF (LOCK)
|
1.0 or less
|
|||||
|
1D
|
Signal ground
|
Body ground
|
Under any condition
|
1.0 or less
|
• Body ground
• Related wiring harness
|
|
|
1E
|
Rear turn light (RH) control
|
Rear turn light (RH)
|
Ignition switched ON (engine off)
|
Turn switch at right turn light position
|
1.0 or less Û B+
|
• Turn switch
• Start stop unit
• Front body control module (FBCM)
• Related wiring harness
|
|
Turn switch is in position other than above
|
1.0 or less
|
|||||
|
1F
|
Side turn light (RH) control
|
Side turn light (RH)
|
Ignition switched ON (engine off)
|
Turn switch at right turn light position
|
1.0 or less Û B+
|
• Turn switch
• Start stop unit
• Front body control module (FBCM)
• Related wiring harness
|
|
Turn switch is in position other than above
|
1.0 or less
|
|||||
|
1G
|
Front turn light (RH) control
|
Front turn light (RH)
|
Ignition switched ON (engine off)
|
Turn switch at right turn light position
|
1.0 or less Û B+
|
• Turn switch
• Start stop unit
• Front body control module (FBCM)
• Related wiring harness
|
|
Turn switch is in position other than above
|
1.0 or less
|
|||||
|
1H
|
—
|
—
|
—
|
—
|
—
|
|
|
1I
|
TNS relay
|
TNS relay
|
Light switch at TNS position
|
B+
|
• TNS relay
• Turn switch
• Start stop unit
• Front body control module (FBCM)
• Related wiring harness
|
|
|
Light switch at OFF position
|
1.0 or less
|
|||||
|
1J
|
—
|
—
|
—
|
—
|
—
|
|
|
1K
|
—
|
—
|
—
|
—
|
—
|
|
|
1L
|
Horn relay control
|
Horn relay
|
Horn switch not pressed
|
B+
|
• Horn relay
• Horn switch
• Clock spring
• STOP 10 A fuse
• Related wiring harness
|
|
|
Horn switch pressed
|
1.0 or less
|
|||||
|
1M
|
Headlight relay (LO) No.2 control
|
Headlight LO relay No.2
|
Ignition switched ON (engine off)
|
Light switch at HEAD position
|
1.0 or less
|
• Headlight LO relay No.2
• H/L LOW R 15 A fuse
• Light switch
• Start stop unit
• Related wiring harness
|
|
Light switch is in position other than above
|
B+
|
|||||
|
1N
|
—
|
—
|
—
|
—
|
—
|
|
|
1O*1
|
Theft-deterrent horn input signal
|
Rear body control module (RBCM)
|
M-MDS is connected and theft-deterrent is sounded using data monitor function
|
1.0 or less
|
• Rear body control module (RBCM)
• Related wiring harness
|
|
|
M-MDS is connected and theft-deterrent is not sounded using data monitor function
|
B+
|
|||||
|
1P
|
Rear window defogger relay control
|
Rear window defogger relay
|
Ignition switched ON (engine off)
|
Rear window defogger switch OFF
|
B+
|
• DEFOG 40 A fuse
• Rear window defogger switch (front climate control unit)
• Rear window defogger relay
• Related wiring harness
|
|
Rear window defogger switch ON
|
1.0 or less
|
|||||
|
1Q
|
—
|
—
|
—
|
—
|
—
|
|
|
1R*1
|
Theft-deterrent horn power supply
|
R.WIPER 15 A fuse
|
Under any condition
|
B+
|
• R.WIPER 15 A fuse
• Related wiring harness
|
|
|
1S
|
—
|
—
|
—
|
—
|
—
|
|
|
1T*1
|
Theft-deterrent horn output signal
|
Theft-deterrent horn
|
M-MDS is connected and theft-deterrent is sounded using data monitor function
|
B+
|
• Theft-deterrent horn
• Related wiring harness
|
|
|
M-MDS is connected and theft-deterrent is not sounded using data monitor function
|
1.0 or less
|
|||||
|
2A
|
Interior light power supply
|
• ROOM 15 A fuse
• Rear body control module (RBCM)
• Start stop unit
|
Under any condition
|
B+
|
• ROOM 15 A fuse
• Related wiring harness
|
|
|
2B
|
Front turn light (LH) control
|
Front turn light (LH)
|
Ignition switched ON (engine off)
|
Turn switch at left turn light position
|
1.0 or less Û B+
|
• Turn switch
• Start stop unit
• Front body control module (FBCM)
• Related wiring harness
|
|
Turn switch is in position other than above
|
1.0 or less
|
|||||
|
2C
|
Daytime running light control
|
DRL relay
|
Ignition switched ON (engine off) and light switch OFF
|
Daytime running light illuminates
|
B+
|
• Front body control module (FBCM)
• DRL relay
• Related wiring harness
|
|
Daytime running light turns off
|
1.0 or less
|
|||||
|
2D
|
Rear turn light (LH) control
|
Rear turn light (LH)
|
Ignition switched ON (engine off)
|
Turn switch at left turn light position
|
1.0 or less Û B+
|
• Turn switch
• Start stop unit
• Front body control module (FBCM)
• Related wiring harness
|
|
Turn switch is in position other than above
|
1.0 or less
|
|||||
|
2E
|
LIN communication
|
Current sensor
|
Terminal used for communication therefore determination based on terminal voltage is not possible.
|
|||
|
2F
|
Side turn light (LH) control
|
Side turn light (LH)
|
Ignition switched ON (engine off)
|
Turn switch at left turn light position
|
1.0 or less Û B+
|
• Turn switch
• Start stop unit
• Front body control module (FBCM)
• Related wiring harness
|
|
Turn switch is in position other than above
|
1.0 or less
|
|||||
|
2G
|
LIN communication
|
auto-light sensor/rain sensor
|
Terminal used for communication therefore determination based on terminal voltage is not possible.
|
|||
|
2H
|
LIN communication
|
DC-DC converter
|
Terminal used for communication therefore determination based on terminal voltage is not possible.
|
|||
|
2I
|
CAN_L
|
CAN system related module
|
Terminal used for communication therefore determination based on terminal voltage is not possible.
|
|||
|
2J
|
—
|
—
|
—
|
—
|
—
|
|
|
2K
|
CAN_H
|
CAN system related module
|
Terminal used for communication therefore determination based on terminal voltage is not possible.
|
|||
|
2L
|
CAN_L
|
CAN system related module
|
Terminal used for communication therefore determination based on terminal voltage is not possible.
|
|||
|
2M
|
Ignition power supply
|
C/U IG1 15 A fuse
|
Ignition switched ON (engine off)
|
B+
|
• C/U IG1 15 A fuse
• IG1 relay
• Start stop unit
• Related wiring harness
|
|
|
Ignition switched OFF (LOCK)
|
1.0 or less
|
|||||
|
2N
|
CAN_L
|
CAN system related module
|
Terminal used for communication therefore determination based on terminal voltage is not possible.
|
|||
|
2O
|
—
|
—
|
—
|
—
|
—
|
|
|
2P
|
CAN_H
|
CAN system related module
|
Terminal used for communication therefore determination based on terminal voltage is not possible.
|
|||
|
2Q
|
Brake fluid level switch signal
|
Brake fluid level sensor
|
Ignition switched ON (engine off)
|
Brake fluid level is less than MIN (brake fluid level sensor ON)
|
1.0 or less
|
• Brake fluid level sensor
• Front body control module (FBCM)
• Related wiring harness
|
|
Brake fluid level is MIN or more (brake fluid level sensor OFF)
|
Wave pattern (See Pattern 1.)
|
|||||
|
2R
|
CAN_H
|
CAN system related module
|
Terminal used for communication therefore determination based on terminal voltage is not possible.
|
|||
|
2S
|
—
|
—
|
—
|
—
|
—
|
|
|
2T
|
—
|
—
|
—
|
—
|
—
|
|
|
2U
|
IG2 control
|
Start stop unit
|
Ignition switched ON (engine off)
|
B+
|
• Start stop unit
• Related wiring harness
|
|
|
Ignition switched OFF (LOCK)
|
1.0 or less
|
|||||
|
2V
|
Headlight relay (LO) No.1 control
|
Headlight LO relay No.1
|
Ignition switched ON (engine off)
|
Light switch at HEAD position
|
1.0 or less
|
• Light switch
• Start stop unit
• Headlight LO relay No.1
• Related wiring harness
|
|
Light switch is in position other than above
|
B+
|
|||||
|
2W
|
Headlight (LO) switch signal
|
Start stop unit
|
Ignition switched ON (engine off)
|
Light switch at HEAD position
|
1.0 or less
|
• Light switch
• Start stop unit
• Related wiring harness
|
|
Light switch at OFF position
|
B+
|
|||||
|
2X
|
Headlight relay (HI) control
|
Headlight HI relay
|
Ignition switched ON (engine off)
|
Headlight at HEAD position and dimmer switch at LO position
|
B+
|
• H/L HI 20 A fuse
• Light switch
• Start stop unit
• Headlight HI relay
• Related wiring harness
|
|
Headlight at HEAD position and dimmer switch at HIGH or passing position
|
1.0 or less
|
|||||
|
2Y
|
Windshield wiper (LO) switch signal
|
Start stop unit
|
Windshield wiper switch at ON position
|
1.0 or less
|
• Front body control module (FBCM)
• Windshield wiper switch
• Start stop unit
• Related wiring harness
|
|
|
Windshield wiper switch at OFF position
|
B+
|
|||||
|
2Z
|
Blower motor relay control
|
• Blower relay
• Rear blower relay
|
Ignition switched ON (engine off)
|
1.0 or less
|
• Blower relay
• Rear blower relay
• HEATER 40 A fuse
• R.HEATER 20 A fuse
• Related wiring harness
|
|
|
Ignition switched OFF (LOCK)
|
B+
|
|||||
|
2AA
|
Auto stop switch signal
|
Windshield wiper motor
|
Ignition switched ON (engine off)
|
Wipers are stopped in position other than park
|
B+
|
• Windshield wiper motor
• Front body control module (FBCM)
• Related wiring harness
|
|
Wipers are stopped in park position
|
1.0 or less
|
|||||
|
2AB*2
|
Front fog light relay control
|
Front fog light relay
|
Light switch at HEAD or TNS position
|
Front fog light switch OFF
|
B+
|
• Front fog light relay
• FOG 15 A fuse
• Fog light switch
• Start stop unit
• Related wiring harness
|
|
Front fog light switch ON
|
1.0 or less
|
|||||
|
3A
|
Wiper power supply
|
WIPER 20 A fuse
|
Under any condition
|
B+
|
• WIPER 20 A fuse
• Related wiring harness
|
|
|
3B
|
Wiper power supply
|
WIPER 20 A fuse
|
Under any condition
|
B+
|
• WIPER 20 A fuse
• Related wiring harness
|
|
|
3C
|
Windshield wiper motor (HI) control
|
Windshield wiper motor
|
Ignition switched ON (engine off)
|
Windshield wiper switch at HI position
|
B+
|
• Front body control module (FBCM)
• Start stop unit
• Windshield wiper switch
• Windshield wiper motor
• Related wiring harness
|
|
Windshield wiper switch at OFF position
|
1.0 or less
|
|||||
|
3D
|
Power ground
|
Body ground
|
Under any condition
|
1.0 or less
|
• Body ground
• Related wiring harness
|
|
|
3E
|
Windshield wiper motor (HI) control
|
Windshield wiper motor
|
Ignition switched ON (engine off)
|
Windshield wiper switch at HI position
|
B+
|
• Front body control module (FBCM)
• Start stop unit
• Windshield wiper switch
• Windshield wiper motor
• Related wiring harness
|
|
Windshield wiper switch at OFF position
|
1.0 or less
|
|||||
|
3F
|
Windshield washer motor control
|
Washer motor
|
Ignition switched ON (engine off)
|
Windshield washer switch ON
|
B+
|
• Front body control module (FBCM)
• Start stop unit
• Windshield wiper switch
• Washer motor
• Related wiring harness
|
|
Windshield washer switch OFF
|
1.0 or less
|
|||||
|
3G
|
Windshield wiper motor (LOW) control
|
Windshield wiper motor
|
Ignition switched ON (engine off)
|
Windshield wiper switch at LOW position
|
B+
|
• Front body control module (FBCM)
• Start stop unit
• Windshield wiper switch
• Windshield wiper motor
• Related wiring harness
|
|
Windshield wiper switch at OFF position
|
1.0 or less
|
|||||
|
3H
|
Rear window washer motor control
|
Washer motor
|
Ignition switched ON (engine off)
|
Rear washer switch ON
|
B+
|
• Front body control module (FBCM)
• Start stop unit
• Rear washer switch
• Washer motor
• Related wiring harness
|
|
Rear washer switch OFF
|
1.0 or less
|
|||||
|
3I
|
Windshield wiper motor (LOW) control
|
Windshield wiper motor
|
Ignition switched ON (engine off)
|
Windshield wiper switch at LOW position
|
B+
|
• Front body control module (FBCM)
• Start stop unit
• Windshield wiper switch
• Windshield wiper motor
• Related wiring harness
|
|
Windshield wiper switch at OFF position
|
1.0 or less
|
|||||
|
3J
|
Interior illumination power supply
|
• Electric parking brake switch
• Shift panel
• Commander switch
• Hazard warning switch
• Clock spring (steering switch)
• Clock spring (cruise control switch)
• Cluster switch
• Front map light
|
Light switch at TNS position
|
B+
|
• Front body control module (FBCM)
• Electric parking brake switch
• Shift panel
• Commander switch
• Hazard warning switch
• Clock spring (steering switch)
• Clock spring (cruise control switch)
• Cluster switch
• Front map light
• Related wiring harness
|
|
|
Light switch at OFF position
|
—*3
|
|||||
|
3K
|
Power supply
|
HAZARD 25 A fuse
|
Under any condition
|
B+
|
• HAZARD 25 A fuse
• Related wiring harness
|
|
|
3L
|
Power supply
|
HAZARD 25 A fuse
|
Under any condition
|
B+
|
• HAZARD 25 A fuse
• Related wiring harness
|
|
Inspection Using an Oscilloscope (Reference)
Pattern 1
ac8wzw00004277
|
