Inspection and Adjustment
INSPECTION AND ADJUSTMENTDescription and Conditions
DESCRIPTION
The purpose of the operational check is to confirm that the system operates properly.
CONDITIONS:
- Engine running and at normal operation temperature.
Inspection Procedure
INSPECTION PROCEDURE:
STEP 1: Check Blower
1. Turn blower control dial clockwise, blower should operate on low speed.
2. Continue turning blower control dial clockwise, and continue checking blower speeds until all speeds are checked.
3. Leave blower on HI speed.
If NG, go to HAC-43, "Diagnosis Procedure". Blower Motor
If OK, continue with next check.
STEP 2: Check Discharge Air
Intake door position is checked in the next step.
If NG, go to HAC-33, "Diagnosis Procedure". Mode Door Motor Circuit
If OK, continue with next check.
STEP 3: Check Recirculation
If NG, go to HAC-36, "Diagnosis Procedure". Air Mix Door Motor
If OK, continue with next check.
STEP 4: Check Temperature Decrease
1. Turn the temperature dial counterclockwise to 16 °C ("60°).
2. Check for cold air at discharge air outlets.
If NG, go to HAC-84, "Component Function Check". Insufficient Cooling
If OK, continue with next check.
STEP 5: Check Temperature Increase
1. Turn the temperature dial clockwise to 32 °C (90 °F).
2. Check for hot air at discharge air outlets.
If NG, go to HAC-92, "Component Function Check". Insufficient Heating
If OK, continue with next check.
STEP 6: Check AUTO Mode
1. Press the AUTO switch.
2. Confirm that the compressor clutch engages (audio or visual inspection).
(Discharge air and blower speed will depend on ambient, in-vehicle and set temperatures.)
If NG, go to HAC-62, "Diagnosis Procedure", Power Supply and Ground Circuit For Front Air Control then if necessary, HAC-47, "Component Function Check". Magnet Clutch Circuit
If all operational checks are OK (symptom can not be duplicated), perform tests to simulate driving condition environment. If symptom appears, refer to HAC-83, "Symptom Matrix Chart". Symptom Chart
Auxiliary Mechanism Trimmers
TEMPERATURE SETTING TRIMMER
The trimmer compensates for differences in range of ±3 °C (±6 °F) between temperature setting (displayed digitally) and temperature felt by customer.
Operating procedures for this trimmer are as follows:
1. Begin self-diagnosis STEP-5 mode. Refer to HAC-23, "Diagnosis Description". Reading and Clearing Diagnostic Trouble Codes
2. Turn blower control dial clockwise to set system in auxiliary mode.
3. Display shows "61" in auxiliary mechanism. It takes approximately 3 seconds to enable setting operation.
4. Turn temperature control dial (LH) as desired. Temperature will change at a rate of 0.5 °C (1.0 °F) each time a dial is turned.
NOTE:
- A decimal point is not indicated on the display.
- Negative value is displayed on the LH temperature display.
When battery cable is disconnected or battery voltage is below 10 V, trimmer operation is canceled. Temperature set becomes that of initial condition, i.e. 0 °C (0 °F).
FOOT POSITION SETTING TRIMMER
D/F1 stop position mode can be set.
Operating procedures for this trimmer are as follows:
1. Begin self-diagnosis STEP-5 mode. Refer to HAC-23, "Diagnosis Description". Reading and Clearing Diagnostic Trouble Codes
2. Turn blower control dial clockwise to set system in auxiliary mode.
3. Press the OFF switch for each mode as desired.
When battery cable is disconnected or battery voltage is below 10 V, trimmer operation is canceled. Foot position mode set becomes that of initial condition.
INLET PORT MEMORY FUNCTION
When ignition switch is turned from OFF to ON, inlet port can be set to AUTO or manual.
When battery cable is disconnected or battery voltage is below 10 V, memory function is canceled. Memory function set becomes that of initial condition.