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Inspection Procedure

WARNING: This page is about a different car, the 2003 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
  1. Read value of TOYOTA hand-held tester. 

    PREPARATION:

    1. Connect the TOYOTA hand-held tester to the DLC3.
    2. Turn the ignition switch ON and push the TOYOTA hand-held tester main SW ON.

    CHECK:

    Select the item "A/C SIG" in the DATA LIST and read its value displayed on the TOYOTA hand-held tester.

    OK:

    Fig 1: Data List
    G02839121Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE: Check with the engine running.
    1. NG : Go to step   6 . 
    2. OK : Go To Next Step. 
  2. Check magnetic clutch relay. 

    PREPARATION:

    Remove magnetic clutch relay from engine room J/B.

    CHECK:

    Check continuity between each pair of terminals shown below of magnetic clutch relay.

    OK:

    TESTER CONNECTION SPECIFIED CONDITION

    Tester connection Specified condition
    1 - 2 62.5 - 90.9 Ω
    3 - 5 No Continuity
    Fig 2: Checking Magnetic Clutch Relay
    G02839122Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    PREPARATION:

    Apply battery positive (+) voltage between terminals 1 and 2.

    CHECK:

    Check continuity between terminals 3 and 5.

    OK:

    1. Continuity exists. 
    1. NG : Replace magnetic clutch relay. 
    2. OK : Go To Next Step. 
  3. Read value of TOYOTA hand-held tester. 

    PREPARATION:

    1. Connect the TOYOTA hand-held tester to the DLC3.
    2. Turn the ignition switch ON and push the TOYOTA hand-held tester main SW ON.

    CHECK:

    Select the item "A/C MAG CLUTCH" in the DATA LIST and read its value displayed on the TOYOTA hand-held tester.

    OK:

    Fig 3: Data List
    G02839123Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE: Check with the engine running.
    1. NG : Repair or replace harness or connector. 
    2. OK : Go To Next Step. 
  4. Check A/C magnetic clutch. 

    PREPARATION:

    Disconnect magnetic clutch connector.

    CHECK:

    Connect positive (+) lead connected to battery to magnetic clutch connector terminal 3.

    OK:

    1. Magnetic clutch is energized. 
    Fig 4: Checking A/C Magnetic Clutch
    G02839124Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : Repair A/C magnetic clutch. 
    2. OK : Go To Next Step. 
  5. Check harness and connector between magnetic clutch and battery (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
    1. NG : Repair or replace harness or connector. 
    2. OK : Proceed to next circuit inspection shown in  PROBLEM SYMPTOMS TABLE  . 
  6. Check voltage between terminal AC1, A/CS of integration control and panel connector and body ground. 

    PREPARATION:

    1. Remove integration control and panel with connector still connected.
    2. Start the engine and push AUTO switch.

    CHECK:

    Check the voltage between terminal A/CS, AC1 of integration control and panel connector and body ground when magnetic clutch is ON and OFF by A/C switch.

    OK:

    SWITCH OPERATION SPECIFIED CONDITION

    Switch Operation Tester Connection Specified Condition
    ON AC1 - Body Ground 1.3 - 2.6 V
    OFF AC1 - Body Ground 3.7 - 4.5 V
    ON A/CS - Body Ground 10 - 14 V
    OFF A/CS - Body Ground Below 1.0 V
    Fig 5: Checking Voltage Between Terminal A/CS, AC1 Of Integration Control And Panel Connector And Body Ground
    G02839125Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : Check and replace integration control and panel. 
    2. OK : Repair or replace harness or connector. 
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