Rear Air Conditioning Control Panel Circuit: Procedure

1. Disconnect the R1 control connector.
   Fig 1: Checking Harness And Connector (Rear Air Conditioning Control Assembly - Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   R1-10 (E) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Measure the voltage according to the value(s) in the table below.
   Fig 2: Checking Harness And Connector (Rear Air Conditioning Control Assembly - Battery)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   R1-10 (E) - R1-2 (IG+)	Ignition switch ON	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the D38 amplifier connector.
   Fig 3: Identifying Harness And Connector (Air Conditioning- Rear Air Conditioning Control)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   D38-13 (RLIN) - R1-5 (MPX-)	Always	Below 1 Ω
   D38-13 (RLIN) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the rear air conditioning control assembly. Refer to REMOVAL .

NEXT: Go to next step 

1. Reconnect the D38 amplifier connector.
2. Operate the rear air conditioning control assembly to check that it functions properly.

   OK

   Rear air conditioning control assembly function operates normally.

NG → See step   5 

OK → END (REAR AIR CONDITIONING CONTROL ASSEMBLY IS DEFECTIVE)