Inspection Procedure

Preparation

1. Remove center cluster module control with connectors still connected.
2. Turn ignition switch ON.

   Check:  Press REC/FRS switch to change air inlet between fresh and recirculation air and measure voltage between terminals TPI and SGTPI of A/C amplifier when the air inlet servomotor operates. If OK  , see Fig 2.

   NOTE: As the air inlet control servomotor is moved from REC side to FRS side, the voltage decreases gradually without interruption.
   Fig 1: Locating A/C Amplifier Terminal TPI

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   Fig 2: Identifying A/C Amplifier Terminal TPI Specifications (Air Flow Selection Switch In Recirculate Or Fresh)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: Go to step   2 . 
2. If OK  , proceed to next circuit inspection shown on problem symptoms table. See PROBLEM SYMPTOMS TABLE . However, if DTC 32 or 42 is displayed, check and replace A/C amplifier.

PREPARATION:  Remove air inlet control servomotor. See step 4 of BLOWER UNIT DISASSEMBLY .

Check:  Measure resistance between terminals 1 and 2 of air inlet control servomotor connector. If OK  , resistance : 4.2 - 7.8 kΩ.

Check:  While operating air inlet control servomotor as in the procedure DTC 42: AIR INLET CONTROL SERVOMOTOR CIRCUIT , measure resistance between terminals 2 and 3 of air inlet control servomotor connector.

Fig 3: Testing Procedure For Terminals 1-3 Of Air Inlet Control Servomotor

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If OK  , see Fig 4.

Fig 4: Identifying Air Inlet Control Servomotor Specifications (Air Flow Selection Switch In Recirculate Or Fresh)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG:  Replace air inlet control servomotor.
2. OK: Go to step   3 . 

1. NG:  Repair or replace harness or connector.
2. If OK  , check and replace A/C amplifier.