Diagnostic Procedure For Rear Air Control

WARNING: This page is about a different car, the 2007 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM:

Blower motor operation is malfunctioning. Refer to "REAR BLOWER MOTOR CIRCUIT ".
Temperature/mode operation is malfunctioning.

CHECK OPERATION FROM FRONT AIR CONTROL
Does rear temperature/mode operate normally from front air control?

Yes or No

YES: GO TO 2.

NO: Refer to "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR (REAR) ".
CHECK CIRCUIT BETWEEN REAR AIR CONTROL AND FRONT AIR CONTROL FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect front air control and rear air control connectors.
3. Check continuity between front air control harness connector M49 terminal 24 and rear air control harness connector M209 terminal 5.
  24 - 5 Continuity should exist.
4. Check continuity between rear air control harness connector M209 terminal 5 and ground.
  5 - Ground Continuity should not exist.
  
  Fig 1: Checking Continuity Between Rear Air Control Harness Connector M209 Terminal 5 And Ground
OK or NG

OK: GO TO 3.

NG: Repair harness or connector.
CHECK CIRCUIT BETWEEN REAR AIR CONTROL AND AIR MIX DOOR MOTOR (REAR) FOR OPEN OR SHORT
1. Disconnect air mix door motor (rear) connector.
2. Check continuity between rear air control harness connector M209 terminal 2 and 4 and air mix door motor (rear) harness connector B155 terminal 2 and 3.
  2 - 2 Continuity should exist.
  
  4 - 3 Continuity should exist.
3. Check continuity between rear air control harness connector M209 terminals 2 and 4 and ground.
  2, 4 - Ground Continuity should not exist.
  
  Fig 2: Checking Continuity Between Rear Air Control Harness Connector M209 Terminals 2 And 4 And Ground
OK or NG

OK: Replace rear air control. Refer to "REAR AIR CONTROL ".

NG: Repair harness or connector.