DESCRIPTION If the air
inlet mode cannot be changed between recirculation/fresh or exhaust gas
odors can be smelled even though recirculation mode is selected, the
following factors may be the cause.
Symptom | Factor |
- Air inlet mode cannot be changed between recirculation/fresh
- Exhaust gas odors can be smelled when air inlet mode set to recirculation mode
|
- No. 1 blower damper servo sub-assembly malfunction
- Damper link disconnection
- Air inlet damper mechanically locked
- Engine coolant temperature (high)
- Air conditioner unit assembly malfunction
| PROCEDURE
1. |
CHECK NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY |
(a) Check that the No. 1 blower damper servo sub-assembly is installed correctly.
OK: The No. 1 blower damper servo sub-assembly is installed correctly.
NG |
| INSTALL NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY CORRECTLY |
OK |
| |
(a) Check for DTCs. Body Electrical > Air Conditioner > Trouble Codes
Result | Proceed to |
B1442 is not output | A |
B1442 is output | B |
B |
| GO TO DTC B1442 |
A |
| |
3. |
READ VALUE USING TECHSTREAM | (a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG). (c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Data List. (e) Read the Data List according to the display on the Techstream. Powertrain > Engine > Data List
Tester Display | Measurement Item |
Range | Normal Condition |
Diagnostic Note |
Coolant Temperature | Engine coolant temperature |
Min.: -40°C (-40°F), Max.: 140°C (284°F) |
75 to 100°C (167 to 212°F): After warming up |
This is the engine coolant temperature.
HINT:
- After warming up the engine, the engine coolant temperature will be 75 to 100°C (167 to 212°F).
- After a long soak, the engine coolant temperature, intake air
temperature and ambient air temperature will be approximately equal.
- If the value is -40°C (-40°F), or higher than 135°C (275°F), the sensor circuit is open or shorted.
- Check if the engine overheats if the value indicated is higher than 135°C (275°F).
| Powertrain > Engine > Data List
Tester Display | Coolant Temperature |
OK: After warming up the engine, the temperature value displayed is within the range specified in the normal condition column.
OK |
| REPLACE AIR CONDITIONER UNIT ASSEMBLY |
NG |
| GO TO COOLING SYSTEM | |