Rear Air Conditioning Control Panel Circuit

AIR CONDITIONING: AIR CONDITIONING SYSTEM: Rear Air Conditioning Control Panel Circuit

Rear Air Conditioning Control Panel Circuit

DESCRIPTION

This circuit consists of the rear A/C switch (built into rear power seat module) and the air conditioning amplifier. When the rear A/C switch is operated, signals are transmitted to the air conditioning amplifier through the LIN communication system.
If the LIN communication system malfunctions, the air conditioning amplifier does not operate even if the rear A/C switch is operated.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (RR MPX-B2)
(a) Remove the RR MPX-B2 fuse from the luggage room junction block.
(b) Measure the resistance of the fuse.
Standard resistance:

NG -- REPLACE FUSE
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (REAR POWER SEAT MODULE - BODY GROUND AND BATTERY)

(a) Disconnect the r2*1 or S15*2 rear power seat module connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

W/O Ottoman

W/ Ottoman

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - REAR POWER SEAT MODULE)

(a) Disconnect the r2*1 or S15*2 rear power seat module connector.
(b) Disconnect the L76 air conditioning amplifier connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:

W/O Ottoman

W/ Ottoman

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. REPLACE REAR POWER SEAT MODULE
(a) Replace the rear power seat module with a new or properly functioning one Removal.
(b) Operate the rear power seat module to check that it functions properly.
OK:
Rear power seat module function operates normally.
NG -- REPLACE AIR CONDITIONING AMPLIFIER
OK -- END (REAR POWER SEAT MODULE IS FAULTY)