2004 INFINITI QX56 Factory Service Manual

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Page 473 of 3371

INFINITI QX56 2004 Factory Service Manual ATC-68 TROUBLE DIAGNOSIS Revision: August 20072004 QX56 SYSTEM DESCRIPTION Component Parts Air mix door control system components are: Front air control Air mix door motors (driver, passenger, and r

Page 474 of 3371

INFINITI QX56 2004 Factory Service Manual TROUBLE DIAGNOSIS ATC-69 C D E F G H I K L MA B AT C Revision: August 20072004 QX56 COMPONENT DESCRIPTION Air Mix Door Motors The driver and front passenger air mix door motors are attached to the fro

Page 475 of 3371

INFINITI QX56 2004 Factory Service Manual ATC-70 TROUBLE DIAGNOSIS Revision: August 20072004 QX56 2. CHECK POWER SUPPLY CIRCUITS FOR AIR MIX DOOR MOTOR (DRIVER) 1. Turn ignition switch OFF. 2. Disconnect front air control connector M49 and ai

Page 476 of 3371

INFINITI QX56 2004 Factory Service Manual TROUBLE DIAGNOSIS ATC-71 C D E F G H I K L MA B AT C Revision: August 20072004 QX56 6. CHECK PBR FEEDBACK SIGNAL 1. Reconnect front air control connector and air mix door motor (Driver) connector. 2.

Page 477 of 3371

INFINITI QX56 2004 Factory Service Manual ATC-72 TROUBLE DIAGNOSIS Revision: August 20072004 QX56 3. CHECK PBR REFERENCE SIGNAL VOLTAGE 1. Turn ignition switch OFF. 2. Disconnect air mix door motor (Passenger) connector M143. 3. Turn ignition

Page 478 of 3371

INFINITI QX56 2004 Factory Service Manual TROUBLE DIAGNOSIS ATC-73 C D E F G H I K L MA B AT C Revision: August 20072004 QX56 7. CHECK PBR FEEDBACK CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect air mix door motor (Passenger) connector M1

Page 479 of 3371

INFINITI QX56 2004 Factory Service Manual ATC-74 TROUBLE DIAGNOSIS Revision: August 20072004 QX56 4. CHECK PBR REFERENCE VOLTAGE CIRCUIT BETWEEN AIR MIX DOOR MOTOR (REAR) AND FRONT AIR CONTROL 1. Turn ignition switch OFF. 2. Disconnect front

Page 480 of 3371

INFINITI QX56 2004 Factory Service Manual TROUBLE DIAGNOSIS ATC-75 C D E F G H I K L MA B AT C Revision: August 20072004 QX56 7. CHECK PBR FEEDBACK CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect air mix door motor (Rear) connector B155 an
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