PINPOINT TEST I: UNABLE TO DUPLICATE THE CUSTOMER CONCERN AND NO DTCs PRESENT

• Ignition ON.
• Select PANEL mode.
• Observe blower motor operation and select each blower motor speed.

Does the blower motor operate in all selections and change speed in each? 

• Yes  : GO to I2  .
• No  : For EMTC  base with 4 blower motor speed positions, if the blower motor does not operate in any setting, GO to PINPOINT TEST W .

  For EATC  dual zone or EMTC  with 4.2 inch display with 7 blower motor speed positions, if the blower motor does not operate in any setting, GO to PINPOINT TEST Y .

  For EMTC  base with 4 blower motor speed positions, if the blower motor does not properly change speeds or shut OFF, GO to PINPOINT TEST X .

  For EATC  dual zone or EMTC  with 4.2 inch display with 7 blower motor speed positions, if the blower motor does not properly change speeds or shut OFF, GO to PINPOINT TEST Z .

• Select the highest blower motor setting.
• NOTE: Refer to DESCRIPTION AND OPERATION  for proper airflow descriptions.

  While observing the airflow, select each of the airflow positions (PANEL, PANEL/FLOOR, FLOOR, FLOOR/DEFROST, DEFROST).

Is the airflow directed to the proper outlets? 

• Yes  : GO to I3  .
• No  : EMTC  base, GO to PINPOINT TEST L .

  For other systems, GO to PINPOINT TEST M .

• Start the vehicle and allow it to reach normal operating temperature.
• With the A/C OFF, select PANEL mode.
• Change the temperature setting from the coldest to the warmest and back to the coldest.

Does the temperature change between very warm to cool? 

• Yes  : GO to I4  .
• No  : If the temperature does not get very warm, GO to PINPOINT TEST N .

  For EMTC  base with 4 blower motor speed positions, if the temperature does not change at all, GO to PINPOINT TEST R .

  For EMTC  with 4.2 inch display with 7 blower motor speed positions, if the temperature does not change at all, GO to PINPOINT TEST S .

  For EATC  dual zone, if the driver side temperature does not change at all, GO to PINPOINT TEST U .

  For EATC  dual zone, if the passenger side temperature does not change at all, GO to PINPOINT TEST V .

• With the engine running and the A/C off, select PANEL mode.
• Select the coldest temperature setting.

Is the outlet temperature close to ambient temperature? 

• Yes  : GO to I5  .
• No  : For EMTC  base with 4 blower motor speed positions, if the temperature is warmer than ambient temperature, GO to PINPOINT TEST R  and diagnose for inoperative blend door.

  For EMTC  with 4.2 inch display with 7 blower motor speed positions, if the temperature is warmer than ambient temperature, GO to PINPOINT TEST S  and diagnose for inoperative blend door.

  For EATC  dual zone, if the driver side temperature is warmer than ambient temperature, GO to PINPOINT TEST U  and diagnose for an inoperative blend door.

  For EATC  dual zone, if the passenger side temperature is warmer than ambient temperature, GO to PINPOINT TEST V  and diagnose for an inoperative blend door.

  If the outlet temperature is significantly colder than ambient temperature and the A/C compressor clutch cycles normally, GO to PINPOINT TEST Q .

  If the outlet temperature is significantly colder than ambient temperature and the A/C compressor clutch does not cycle, GO to PINPOINT TEST P .

• Make sure the ambient air temperature is above 2°C (35°F).
• With the engine running, select PANEL mode.
• Press the A/C button (indicator ON).

Does the A/C clutch engage when the PANEL and A/C button (indicator ON) is pressed? 

• Yes  : GO to I6  .
• No  : GO to PINPOINT TEST O .

• Press the RECIRC button (indicator OFF).
• Select PANEL mode.
• Select the highest blower motor setting.
• Observe airflow noise.
• Press the RECIRC button (indicator ON).

Does the airflow noise increase when the RECIRC mode is selected (indicator ON)? 

• Yes  : The system is operating normally.
• No  : EMTC  base with 4 blower motor speed positions, GO to PINPOINT TEST J .

  For other systems, GO to PINPOINT TEST K .