Type 1
1. Checking the heater fan switch.
A) Measure the voltage at the terminals "10" and ''12" connector at different switch positions.
Normal Voltage:
- OFF - 1.8-2.2 V
- LO - 2.8-3.2 V
- MID - 3.8-4.2 V
- HI - 4.8-5.2 V
2. Checking the air conditioner switch and switch "ECON".
3. Check the blower direction switch.
4. Check switch "FRESH/RECIRC".
5. Checking the temperature controller.
A) Measure resistance between leads "11" And "12" when moving the knob from the maximum cooling position to the maximum heating position.
Normal resistance:
- Max. cooling - 0 Ohm
- Max. heating - about 3 kOhm
b) Check the smoothness of the change in resistance.
6. Checking the rear window defroster switch.
A) Connect the battery to the terminals "1" (+), And "8" (-).
b) Connect (+) batteries via test lamp 12 V 3.4 W 12 V 3.4 W, from (+) to the conclusion "2". When the switch is pressed, the lamp should light up for 12-18 minutes.
7. Checking indicators and backlight. Checking indicators.
A) Connect the battery to the terminals "1" (+), "8" And "5" (-).
b) When each switch is pressed, its lamp should light up.
Note: the rear window defroster lamp is on for 12-18 minutes.
Backlight check.
The same connection, when connected to the output "9" (+) battery light comes on.
Type 2
1. Checking the backlight.
Connect the battery to the terminals "6" (+), "8 (-). The backlight should be on.
Checking the heater fan motor
1. Connect the battery to the terminals "1" (+) And "2" (-) connector, check the smooth rotation of the rotor.
2. Measure the motor current.
- Rated current - less than 3 A
Capacitor motor
1. Connect the battery to the terminals "2" (+) And "1" (-) connector, check the smooth rotation of the rotor.
2. Measure the motor current.
- Rated current - less than 1.5 A
Servo testing
1. Checking the air intake damper servo.
A) Connect "+" battery to the output "1", to the conclusion "2", check that the damper moves to the position "FRESH" (ventilation).
b) Connect "+" battery to the output "1", "-" to the conclusion "3", check that the damper moves to the position "RECIRC" (recycling).
2. Checking the flow mixing damper servo.
A) Connect the battery to the terminals "1" (+) And "2" (-) connector. Check that the lever moves smoothly from the position "COOL" V "NOT".
b) Reverse the polarity of the voltage, check that the lever moves to the position "COOL".
V) Measure resistance between leads "5" And "4".
- Resistance - 4.8-7.2 kOhm
G) Check that when moving the damper from the position "COOL" V "NOT" resistance between pins "4" And "3" changes as shown in the figure.
3. Checking the airflow direction flap servo
A) Connect the battery to the terminals "2" (+) And "1" (-) connector
b) Connecting each terminal of the connector to the negative terminal of the battery, check that the lever moves to the position indicated in the table.
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