2005 INFINITI QX4 Factory Service Manual

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Page 465 of 3419

INFINITI QX4 2005 Factory Service Manual ATC-70 TROUBLE DIAGNOSIS Revision: October 20052005 QX56 Air Mix Door Motor CircuitEJS003XP SYMPTOM: Discharge air temperature does not change. Air mix door motor does not operate. INSPECTION FLOW *

Page 466 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS ATC-71 C D E F G H I K L MA B AT C Revision: October 20052005 QX56 SYSTEM DESCRIPTION Component Parts Air mix door control system components are: Front air control. Air mix door mo

Page 467 of 3419

INFINITI QX4 2005 Factory Service Manual ATC-72 TROUBLE DIAGNOSIS Revision: October 20052005 QX56 COMPONENT DESCRIPTION Air Mix Door Motors The driver and front passenger air mix door motors are attached to the front heater & cooling unit. T

Page 468 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS ATC-73 C D E F G H I K L MA B AT C Revision: October 20052005 QX56 2. CHECK AIR MIX DOOR MOTOR (DRIVER) CIRCUITS FOR SHORT TO GROUND 1. Turn ignition switch OFF. 2. Disconnect the f

Page 469 of 3419

INFINITI QX4 2005 Factory Service Manual ATC-74 TROUBLE DIAGNOSIS Revision: October 20052005 QX56 6. CHECK FRONT AIR CONTROL FOR PBR POWER AND GROUND 1. Reconnect front air control harness connector. 2. Turn ignition switch ON. 3. Check volt

Page 470 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS ATC-75 C D E F G H I K L MA B AT C Revision: October 20052005 QX56 10. CHECK PBR FEEDBACK VOLTAGE 1. Reconnect the front air control harness connector. 2. Turn ignition switch ON. 3.

Page 471 of 3419

INFINITI QX4 2005 Factory Service Manual ATC-76 TROUBLE DIAGNOSIS Revision: October 20052005 QX56 DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR (PASSENGER) 1. CHECK FRONT AIR CONTROL FOR POWER AND GROUND 1. Turn ignition switch ON. 2. Rotate

Page 472 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS ATC-77 C D E F G H I K L MA B AT C Revision: October 20052005 QX56 4. CHECK AIR MIX DOOR MOTOR (PASSENGER) CIRCUITS FOR OPEN 1. Turn ignition switch OFF. 2. Disconnect the front air
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