PINPOINT TEST I: Climate Control System Functional Test
- I1 PERFORM A SELF-TEST ON THE PCM AND HVAC MODULE
- Ignition ON.
- Using a diagnostic scan tool, perform PCM and HVAC module self-tests.
Are any climate control related DTCs present?
- Yes
: For HVAC
module DTCs
, Refer to CLIMATE CONTROL SYSTEM .
For PCM DTCs , REFER to ELECTRONIC ENGINE CONTROLS .
- No : GO to I2 .
- I2 CHECK THE BLOWER MOTOR OPERATION
- 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 I3 .
- No
: If the blower motor does not operate in any setting, GO to PINPOINT TEST R .
If the blower motor does not properly change speeds or shut off, GO to PINPOINT TEST S .
- I3 CHECK AIRFLOW OPERATION
- Select the highest blower motor setting.
- While observing the airflow, select each of the airflow positions (panel, panel/floor, floor, floor/defrost, defrost).
Is the airflow directed to the correct outlets?
- Yes : GO to I4 .
- No : GO to PINPOINT TEST K .
- I4 CHECK THE RECIRCULATION OPERATION
- With the engine running, press the recirculation button (indicator off).
- Select panel mode.
- Select the highest blower motor setting.
- Observe airflow noise.
- Press the recirculation button (indicator on).
Does the airflow noise increase when the recirculation mode is selected (indicator on)?
- Yes : GO to I5 .
- No : GO to PINPOINT TEST J .
- I5 VERIFY TEMPERATURE CONTROL OPERATION
- 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 I6 .
- No
: If the temperature does not get significantly warmer, GO to PINPOINT TEST L .
If the LH temperature does not change at all, GO to PINPOINT TEST P .
If the RH temperature does not change at all, GO to PINPOINT TEST Q .
- I6 VERIFY THE A/C CLUTCH DOES NOT ENGAGE WITH A/C OFF
- 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 I7 .
- No
: If the LH temperature is warmer than ambient temperature, GO to PINPOINT TEST P .
If the RH temperature is warmer than ambient temperature, GO to PINPOINT TEST Q .
If the outlet temperature is significantly colder than ambient temperature and the A/C compressor clutch cycles normally, GO to PINPOINT TEST O .
If the outlet temperature is significantly colder than ambient temperature and the A/C compressor clutch is engaged and does not cycle, GO to PINPOINT TEST N .
- I7 VERIFY A/C CLUTCH ENGAGEMENT IN THE A/C MODE
- Make sure the ambient air temperature is above 2°C (36°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 I8 .
- No : GO to PINPOINT TEST M .
- I8 CHECK FOR INSUFFICIENT COOLING
- Change the temperature setting to coldest (MAX A/C).
- Press the A/C button if the indicator is not on.
Does the A/C compressor clutch engage and cycle on/off when the A/C indicator is on?
- Yes : GO to I9 .
- No : Refer to REFRIGERANT SYSTEM TESTS .
- I9 CHECK THE INT_TEMP PID
- Using a diagnostic scan tool, view the HVAC module PIDs .
- Monitor HVAC module PID INT_TEMP.
Is the air temperature at the cabin temperature sensor similar to the PID?
- Yes : GO to I10 .
- No : GO to PINPOINT TEST D .
- I10 CHECK TOUCHSCREEN OPERATION
- Using the touchscreen controls, select each climate control function.
- Using the touchscreen controls, select each audio control function.
Do all touchscreen controls operate?
- Yes : The system is operating correctly.
- No
: For Premium Plus, REFER to
PINPOINT TEST AI
.
For Sony® Sound, REFER to PINPOINT TEST L .