Recirculation Damper Servo Motor Circuit: Procedure

1. Remove the recirculation damper servo motor.
2. Disconnect the connector from the recirculation damper servo motor.
   Fig 1: Inspecting Recirculation Damper Servo Motor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Connect a positive (+) lead from the battery to terminal 5 and a negative (-) lead from the battery to terminal 2, then check that the arm turns to the "FRESH" side smoothly.

   OK

   Lever turns to "FRESH" side smoothly.

4. Connect a positive (+) lead from the battery to terminal 5 and a negative (-) lead from the battery to terminal 1, then check that the arm turns to the "RECIRCULATION" side smoothly.

   OK

   Lever turns to "RECIRCULATION" side smoothly.

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Recirculation Damper Servo Motor)
   *b	Recirculation
   *c	Fresh

NG → See step   8 

OK: Go to next step 

1. Remove the No. 1 heater control (air inlet control switch).
2. Disconnect the connector from the No. 1 heater control (air inlet control switch).
   Fig 2: Identifying No. 1 Heater Control (Air Inlet Control Switch) E57 Connector Terminals

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

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   E57-3 (FRS) - E57-4 (REC)	Air inlet control switch: FREE	Below 1 Ω
   E57-3 (FRS) - E57-4 (REC)	Air inlet control switch: LOCK	10 kΩ or higher
   E57-1 (F/D) - E57-8 (ACID)	Mode control dial: except Foot/DEF position and DEF position	10 kΩ or higher
   E57-1 (F/D) - E57-8 (ACID)	Mode control dial: Foot/DEF position or DEF position	Below 1 Ω

4. Check that the indicator light comes on.
   1. Turn the heater control base (air inlet control switch) to LOCK.
   2. Connect a positive (+) lead from the battery to terminal 2 and a negative (-) lead from the battery to terminal 4, and check that the indicator light comes on.

      OK

      The indicator light comes on.

5. Check that the illumination comes on.
   1. Connect a positive (+) lead from the battery to terminal 7 and negative (-) lead from the battery to terminal 6, and check that the illumination comes on.

      OK

      The illumination comes on.

      TEXT IN ILLUSTRATION
      
      

      *a	Component without harness connected (No. 1 Heater Control (Air Inlet Control Switch))

NG → See step   9 

OK: Go to next step 

1. Measure the voltage according to the value(s) in the table below.
   Fig 3: Checking Harness And E56 Connector (Recirculation Damper Servo Motor - Battery)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   E56-5 (IG+) - Body ground	Ignition switch: OFF	Below 1 V
   E56-5 (IG+) - Body ground	Ignition switch: ON	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Recirculation Damper Servo Motor)

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 4: Checking Harness And E57 Connector (No. 1 Heater Control (Air Inlet Control Switch) - Battery)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   E57-2 (A/C+) - Body ground	Ignition switch: OFF	Below 1 V
   E57-2 (A/C+) - Body ground	Ignition switch: ON	11 to 14 V
   E57-8 (ACID) - Body ground	Ignition switch: OFF	Below 1 V
   E57-8 (ACID) - Body ground	Ignition switch: ON	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to No. 1 Heater Control (Air Inlet Control Switch))

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E57-4 (REC) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E57-3 (FRS) - E56-2 (FRS)	Always	Below 1 Ω
   E57-5 (LED+) - E56-1 (REC)	Always	Below 1 Ω
   E57-3 (FRS) - Body ground	Always	10 kΩ or higher
   E57-5 (LED+) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the connector from the A/C amplifier.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E57-1 (F/D) - E8-15 (A/C)*1	Always	Below 1 Ω
   E8-15 (A/C) - Body ground*1	Always	10 kΩ or higher
   E57-1 (F/D) - E73-27 (A/C)*2	Always	Below 1 Ω
   E73-27 (A/C) - Body ground*2	Always	10 kΩ or higher

   • *1: for 2AZ-FE
   • *2: for 2ZR-FE

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   10