Temperature sensor test table in the cabin.
°C | -30 | -20 | -10 | 0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 |
Resistance | 6,24 | 3,68 | 2,25 | 1.41 | 0,42 | 0,61 | 0,41 | 0,29 | 0,20 | 0,15 | 0,11 |
Table for checking the temperature sensor outside the passenger compartment.
°C | -30 | -20 | -10 | 0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 |
Resistance | 12,47 | 7,36 | 4,49 | 2,83 | 1,83 | 1,22 | 0,83 | 0,57 | 0,41 | 0,29 | 0,21 |
Table for checking the additional instrument cluster.
Circuit breaker test
1. Check for continuity between terminals 2 and 3 of the connector at various switch positions (backlight).
2. Check for continuity between terminals 1 and 2 of the connector when the switch is in the "OFF".
3. Check for continuity between terminals 1 and 2 of the connector when the switch is in the "ON".
3. If the conductivity is different from the given, then check the backlight lamp or replace the switch.
Checking and repairing heater wires
Note:
- When cleaning the glass, use a soft, dry cloth, wipe the glass parallel to the heater wires. Be careful not to damage the wires.
- It is forbidden to use detergents and compositions with abrasive particles.
- When measuring voltage, wrap the negative end of the tester with tin foil and press the edge of the foil against the wire with your finger.
1. Check for broken wires.
A) Turn on "ignition" and a heater of glasses of doors of a back.
b) Measure the voltage at the center of each fuser wire as shown.
V) If the voltage is about 6 V, then the wire is normal.
G) If the voltage is about 12 V, then there is a wire break between the middle and the side bus (+) thermoelement.
d) If the voltage is about 0 V, then there is a wire break between the middle and "earth".
2. Search for a break in the wire.
A) Connect "plus" voltmeter to the side rail (+) thermoelement.
b) Connect "minus" voltmeter with foil to the thermocouple wire at the side rail (+) and slowly move it to the opposite end (To "earth").
V) The point at which the voltmeter needle deviates from zero by a few volts is the break point.
Note: if there is no wire break, then the voltmeter shows 0 V at the side rail (+) thermocouple and, when moving (-) contact of the voltmeter to the opposite end of the wire, the voltage will gradually increase to about 12 V.
3. Wire repair.
A) Clean the ends of the wire at the broken point with silicone thinner and apply protective tape to both ends of the wire.
b) Mix the repair compound thoroughly and, using a fine-tipped brush, apply a drop of the substance to the wire.
Repair Compound: DUPONT PASTE #4817 or similar
V) After a few minutes, remove the protective film and leave to harden for 24 hours.