Inspection Procedure

1. Remove A/C amplifier assy with connectors still connected.
2. Turn the ignition switch to the ON position.
3. Measure voltage according to the value(s) in DTC 22 DIAGNOSTIC PROCEDURE TABLE .

   Standard: 

   DTC 22 DIAGNOSTIC PROCEDURE TABLE
   
   

   Tester connection	Condition	Specified condition
   A16-19 (LOCK) - A16-6 (SG)	Ignition switch ON Magnet clutch ON	Pulse generation (see waveform)

   Fig 1: Identifying A/C Amplifier Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Result: 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   A	NG
   B	OK (Checking from DTC)
   C	OK (When checking from the PROBLEM SYMPTOMS TABLE)

B: REPLACE AIR CONDITIONING AMPLIFIER 

C: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

A: GO TO NEXT STEP. 

Fig 2: Waveform Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect compressor connector.
2. Measure the resistance according to the value(s) in RESULT REFERENCE .

   Standard: 

   RESULT REFERENCE
   
   

   Terminal No.	Condition	Specified Condition
   A2-1 - A2-2	at 20°C (68°F)	165 to 205 Ω

   Fig 3: Identifying A/C Lock Sensor Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE COOLER COMPRESSOR ASSY 

OK: Go to next step 

1. Check for open and short circuit in the harness and the connector between the cooler compressor assy and the A/C amplifier (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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