Contents: Checking the heating element ⤓ Removal and installation the rear…⤓ Checking the rear window defroster…⤓
Checking the heating element
Caution: Wrap a thin foil around the tip of the voltmeter probe to prevent damage to the heating element conductor. Press the foil against the conductor with your finger and move the foil along the conductor to locate the open circuit.
1. Set the engine operating mode to 2000 rpm. Check the heating element with a fully charged battery.
2. Turn on the rear window heater. Using a multimeter, measure the voltage in the middle of the rear window heater (point "A"). The heater is OK if the voltage at point "A" is about 6 V.
3. If the voltage at point "A" is about 12 V, then there is a break in the circuit between the negative terminal of the heating element and point "A". To determine the location of the break, slowly move the multimeter probe along the heating element from point "A" to the negative terminal. At the location of the break in the circuit, the voltage will drop sharply to 0 V.
4. If the voltage at point "A" is 0 V, then the circuit break is located in the section from point "A" to the positive terminal of the heating element. The break can be detected using the method described above. At the break, the voltage will increase sharply to 12 V.
Removal and installation the rear window defroster switch
The procedures for removing and installing the rear window defogger switch are given in the chapter "Heater, air conditioner and ventilation system".
Checking the rear window defroster relay
1. Check for a closed circuit between terminals "1" - "3" of the relay when power is not supplied.
2. Apply power (battery voltage) to terminals "1"(+) and "3"(-) and check for a closed circuit between terminals "4" - "5" of the relay.
