LF CONTROL UNIT INSPECTION

id091400701400

1. Disconnect the negative lead-acid battery terminal. (See NEGATIVE LEAD-ACID BATTERY TERMINAL DISCONNECTION/CONNECTION.)

2. Remove the front side trim. (See LF CONTROL UNIT REMOVAL/INSTALLATION.)

3. Connect the negative lead-acid battery terminal. (See NEGATIVE LEAD-ACID BATTERY TERMINAL DISCONNECTION/CONNECTION.)

4. Verify that the voltages of each of the terminals are as indicated in the terminal voltage table (See Terminal voltage table (reference).).

• If the voltage is not as specified in the terminal voltage table (See Terminal voltage table (reference).), inspect the parts under Inspection item(s).

― If the system does not work normally even though the inspection items are normal, replace the LF control unit.(See LF CONTROL UNIT REMOVAL/INSTALLATION.)

Terminal voltage table (reference)

am3zzw00027710

Terminal

Signal name

Connected to

Measurement conditions

Voltage (V)

Inspection item (s)

A

—

—

—

—

—

B

B1(ROOM)

•  JB No.1

•  F50 15 A fuse

•  F27 25 A fuse

Under any condition

B+

•  JB No.1

•  F50 15 A fuse

•  F27 25 A fuse

•  Related wiring harness

C

—

—

—

—

—

D

B2(LIMP HOME)

•  F22 15A fuse

•  Power switch

Under any condition

B+

•  F22 15A fuse

•  Power switch

•  Related wiring harness

E

L/G LOCK SW

Door lock switch (liftgate)

When liftgate lock switch is pressed

1.0 or less

•  Door lock switch (liftgate)^*1

•  Related wiring harness

When liftgate lock switch is not pressed

5.0

F

RF PWR

Keyless receiver

Under any condition

Approx 5.0

•  Keyless receiver

•  Related wiring harness

G

FR_POWER_SIGNAL

Front outer handle (RH)

When Front outer handle (RH) is touched

B+

•  Front outer handle (RH)

•  Related wiring harness

When Front outer handle (RH) is not touched

1.0 or less

H

FL_POWER_SIGNAL

Front outer handle (LH)

When Front outer handle (LH) is touched

B+

•  Front outer handle (LH)

•  Related wiring harness

When Front outer handle (LH) is not touched

1.0 or less

I

—

—

—

—

—

J

RF SIG

Keyless receiver

Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.

K

FL_GND

Front outer handle (LH)

Under any condition

1.0 or less

•  Front outer handle (LH)

•  Related wiring harness

L

Serial LFU

Body control module (BCM)

Under any condition

B+

•  Body control module (BCM)

•  Related wiring harness

M

CAN BODY H

Climate control unit

Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.

N^*1

FR_GND

Front outer handle (RH)

Under any condition

1.0 or less

•  Front outer handle (RH)

•  Related wiring harness

O

GND

Body ground

Under any condition

Approx. 0

•  GND point

•  Related wiring harness

P

CAN BODY L

Climate control unit

Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.

Q

INT LF-ANT SHIELD

Keyless antenna (exterior, LF)

Under any condition

1.0 or less

Related wiring harness

R

GND

Body ground

Under any condition

Approx. 0

•  GND point

•  Related wiring harness

S

LF FL-

Front outer handle (LH)

Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.

T

LF FL+

Front outer handle (LH)

Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.

U

LF FR-

Front outer handle (RH)

Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.

V

LF FR+

Front outer handle (RH)

Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.

W

LF F-

Keyless antenna (interior, front)

Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.

X

LF F+

Keyless antenna (interior, front)

Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.

Y

LF BUM-

Keyless antenna (exterior, rear)

Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.

Z

LF BUM+

Keyless antenna (exterior, rear)

Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.

AA

LF R-

Keyless antenna (interior, rear)

Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.

AB

LF R+

Keyless antenna (interior, rear)

Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.

AC

—

—

—

—

—

AD

—

—

—

—

—

AE

PATS-

Power switch

Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.

AF

PATS+

Power switch

Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.

Terminal	Signal name	Connected to	Measurement conditions	Voltage (V)	Inspection item (s)
A	—	—	—	—	—
B	B1(ROOM)	• JB No.1 • F50 15 A fuse • F27 25 A fuse	Under any condition	B+	• JB No.1 • F50 15 A fuse • F27 25 A fuse • Related wiring harness
C	—	—	—	—	—
D	B2(LIMP HOME)	• F22 15A fuse • Power switch	Under any condition	B+	• F22 15A fuse • Power switch • Related wiring harness
E	L/G LOCK SW	Door lock switch (liftgate)	When liftgate lock switch is pressed	1.0 or less	• Door lock switch (liftgate)^*1 • Related wiring harness
When liftgate lock switch is not pressed	5.0
F	RF PWR	Keyless receiver	Under any condition	Approx 5.0	• Keyless receiver • Related wiring harness
G	FR_POWER_SIGNAL	Front outer handle (RH)	When Front outer handle (RH) is touched	B+	• Front outer handle (RH) • Related wiring harness
When Front outer handle (RH) is not touched	1.0 or less
H	FL_POWER_SIGNAL	Front outer handle (LH)	When Front outer handle (LH) is touched	B+	• Front outer handle (LH) • Related wiring harness
When Front outer handle (LH) is not touched	1.0 or less
I	—	—	—	—	—
J	RF SIG	Keyless receiver	Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.
K	FL_GND	Front outer handle (LH)	Under any condition	1.0 or less	• Front outer handle (LH) • Related wiring harness
L	Serial LFU	Body control module (BCM)	Under any condition	B+	• Body control module (BCM) • Related wiring harness
M	CAN BODY H	Climate control unit	Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.
N^*1	FR_GND	Front outer handle (RH)	Under any condition	1.0 or less	• Front outer handle (RH) • Related wiring harness
O	GND	Body ground	Under any condition	Approx. 0	• GND point • Related wiring harness
P	CAN BODY L	Climate control unit	Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.
Q	INT LF-ANT SHIELD	Keyless antenna (exterior, LF)	Under any condition	1.0 or less	Related wiring harness
R	GND	Body ground	Under any condition	Approx. 0	• GND point • Related wiring harness
S	LF FL-	Front outer handle (LH)	Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.
T	LF FL+	Front outer handle (LH)	Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.
U	LF FR-	Front outer handle (RH)	Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.
V	LF FR+	Front outer handle (RH)	Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.
W	LF F-	Keyless antenna (interior, front)	Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.
X	LF F+	Keyless antenna (interior, front)	Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.
Y	LF BUM-	Keyless antenna (exterior, rear)	Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.
Z	LF BUM+	Keyless antenna (exterior, rear)	Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.
AA	LF R-	Keyless antenna (interior, rear)	Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.
AB	LF R+	Keyless antenna (interior, rear)	Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.
AC	—	—	—	—	—
AD	—	—	—	—	—
AE	PATS-	Power switch	Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.
AF	PATS+	Power switch	Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.

*1 :With advanced keyless entry system