Contents: Installing a pressure gauge block ↓ Removal the pressure gauge block ↓ Checking the relay ↓
Installing a pressure gauge block
1. Attach the charging hoses to the gauge block. Tighten the nuts by hand.
2. Close the safety valves on the charging hoses.
3. Close the pressure gauge block valves.
4. Remove the plugs from the cooling line service valves.
5. Connect the charging hoses to the service valves. Make sure that the high and low pressure hoses are connected to the appropriate service valves.
6. Open the safety valves of the charging hoses.
Removal the pressure gauge block
1. Close the pressure gauge block valves.
2. Close the safety valves on the charging hoses.
2. Disconnect the charge hoses from the coolant line service valves.
3. Install plugs on service valves.
Checking the relay
1. Checking the main heater relay.
a) Check for constant conductivity between terminals "1" and "3".
b) Check for conductivity between terminals "2" and "6".
c) Check for conductivity between terminals "4" and "2" of the relay when applying battery voltage to terminals "1" and "3".
2. Checking fan relay #2.
a) Check for constant conductivity between terminals "2" and "4".
b) Check for conductivity between terminals "1" and "3".
c) Check for conductivity between terminals "1" and "6" of the relay when applying battery voltage to terminals "2" and "4".
3. Checking fan relay No.3.
a) Check for constant conductivity between terminals "2" and "3".
b) Check for conductivity between terminals "1" and "4".
c) Check for conductivity between terminals "1" and "4" of the relay when applying battery voltage to terminals "2" and "3".
4. Checking the EX-HI relay.
a) Check for constant conductivity between terminals "2" and "3".
b) Check for conductivity between terminals "1" and "4".
c) Check for conductivity between terminals "1" and "4" of the relay when applying battery voltage to terminals "2" and "3".
Cooling unit and heater.
1 - air intake flap servo drive,
2 - EX-HI relay,
3 - evaporator,
4 - heater radiator,
5 - servo drive of the air flow direction flap,
6 - air conditioner amplifier,
7 - air flow mixing flap servo drive,
8 - coolant temperature sensor,
9 - temperature sensor behind the evaporator,
10 - power transistor,
11 - heater fan resistor,
12 - heater fan electric motor.
Tightening torques for threaded connections of the air conditioning system.
5. Checking the electromagnetic clutch relay.
a) Check for constant conductivity between terminals "1" and "2".
b) Check for conductivity between terminals "3" and "6".
c) Check for conductivity between terminals "3" and "6" of the relay when applying battery voltage to terminals "1" and "2".