Inspection Procedure

1. Remove the RR-IG1-2 fuse from the luggage room junction block.
2. Measure the resistance of the fuse.

   Standard resistance 

   FUSE (RR-IG1-2)
   
   

   Tester Connection	Condition	Specified Condition
   RR-IG1-2fuse	Always	Below 1 Ω

NG: REPLACE FUSE 

OK: GO TO NEXT STEP 

Fig 1: Checking Rear Junction Block ECU (SMOK Voltage)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the rear junction block ECU with connectors still connected.
2. Measure the voltage according to the value(s) in the table below when applying or not applying cigarette smoke.

   Standard voltage 

   REAR JUNCTION BLOCK ECU (SMOK VOLTAGE)
   
   

   Tester Connection	Switch Condition	Specified Condition
   S62-7 (SMOK) - Body ground	Engine switch on (IG) Rear cooler AUTO switch ON Apply cigarette smoke	Above 4.0 V
   	Engine switch on (IG) Rear cooler AUTO switch ON No cigarette smoke	Below 1 V

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE   ) 

NG: GO TO NEXT STEP 

Fig 2: Inspecting Smoke Sensor

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the smoke sensor (see REMOVAL  ).
2. Connect the positive (+) lead from the battery to terminal 1 and negative (-) lead to terminal 3.
3. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   SMOKE SENSOR
   
   

   Tester Connection	Condition	Specified Condition
   2-3	There is no cigarette smoke	Below 1.0 V
   	There is cigarette smoke	Above 4.0 V

   NOTE: Since the sensor determines the amount of smoke based on the changes in the amount of light, check the sensor in an area with as little ambient light as possible.

NG: REPLACE SMOKE SENSOR (See  REMOVAL   ) 

OK: GO TO NEXT STEP 

Fig 3: Checking Harness And Connector (Rear Junction Block ECU - Rear Air Conditioning Harness)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the S62 rear junction block ECU connector.
2. Disconnect the S28 rear air conditioning harness connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   REAR JUNCTION BLOCK ECU - REAR AIR CONDITIONING HARNESS
   
   

   Tester Connection	Condition	Specified Condition
   S62-7(SMOK)-S28-13 (S)	Always	Below 1 Ω
   S62-7 (SMOK) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO NEXT STEP 

HINT:

Replace the rear air conditioning harness with a normal one and check that the condition returns to normal (see REMOVAL  ).

OK: Same problem does not occur. 

NG: REPLACE REAR JUNCTION BLOCK ECU 

OK: END (REAR AIR CONDITIONING HARNESS IS FAULTY)