REAR CLIMATE CONTROL UNIT INSPECTION

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1. Connect the rear climate control unit connector.

2. Turn the ignition switch to the ON position.

3. Connect the negative (-) lead of the tester to body ground.

4. By inserting the positive (+) lead of the tester into each rear climate control unit terminal, measure the voltage according to the terminal voltage table.

• If there is any malfunction, inspect the parts under “Inspection item (s)”.

― If the parts under “Inspection item (s)” are found to be normal, replace the rear climate control unit.

Terminal voltage table (Reference)

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Terminal

Signal name

Connected to

Measurement condition

Voltage (V)

Inspection item (s)

A

—

—

—

—

—

B

IG2

Front climate control unit

Ignition switch is at ON position

B+

•  Wiring harness: continuity, short circuit (Rear climate control unit—front climate control unit: B—3B)

•  Front climate control unit: terminal voltage (1W, 1X)

Ignition switch is at LOCK position

1.0 or less

C

Rear climate control unit communication

Front climate control unit

Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.

—

D

—

—

—

—

—

E

Rear climate control unit communication

Front climate control unit

Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.

—

F

TNS signal

Front climate control unit

Turn the headlight switch to the off position

1.0 or less

•  Wiring harness: continuity, short circuit (Rear climate control unit—front climate control unit: F—3F)

•  ILLUMI 10 A fuse

•  TNS relay

•  Headlight switch

Turn the headlight switch to the TNS position

B+

G

—

—

—

—

—

H

Panel light control input

Front climate control unit

Turn the headlight switch to the TNS position and panel light control switch at MAX

1.0 or less

•  Wiring harness: continuity, short circuit (Rear climate control unit—front climate control unit: H—3H)

•  Instrument cluster

Turn the headlight switch to the TNS position and panel light control switch at MIN

Approx. 6.5

I

Ground

Front climate control unit

Under any condition: Inspect for continuity to ground

1.0 or less

•  Wiring harness: continuity (Rear climate control unit—front climate control unit: I—3I)

J

—

—

—

—

—

Terminal	Signal name	Connected to	Measurement condition	Voltage (V)	Inspection item (s)
A	—	—	—	—	—
B	IG2	Front climate control unit	Ignition switch is at ON position	B+	• Wiring harness: continuity, short circuit (Rear climate control unit—front climate control unit: B—3B) • Front climate control unit: terminal voltage (1W, 1X)
B	IG2	Front climate control unit	Ignition switch is at LOCK position	1.0 or less
C	Rear climate control unit communication	Front climate control unit	Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.		—
D	—	—	—	—	—
E	Rear climate control unit communication	Front climate control unit	Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.		—
F	TNS signal	Front climate control unit	Turn the headlight switch to the off position	1.0 or less	• Wiring harness: continuity, short circuit (Rear climate control unit—front climate control unit: F—3F) • ILLUMI 10 A fuse • TNS relay • Headlight switch
F	TNS signal	Front climate control unit	Turn the headlight switch to the TNS position	B+
G	—	—	—	—	—
H	Panel light control input	Front climate control unit	Turn the headlight switch to the TNS position and panel light control switch at MAX	1.0 or less	• Wiring harness: continuity, short circuit (Rear climate control unit—front climate control unit: H—3H) • Instrument cluster
H	Panel light control input	Front climate control unit	Turn the headlight switch to the TNS position and panel light control switch at MIN	Approx. 6.5
I	Ground	Front climate control unit	Under any condition: Inspect for continuity to ground	1.0 or less	• Wiring harness: continuity (Rear climate control unit—front climate control unit: I—3I)
J	—	—	—	—	—