Sequence of work
"15,000 km Annually"
1. Check fuse #5 (see «electrical equipment»).
2. Check double valve: Set the temperature control on the instrument panel to position «cold».
3. Remove the connector from the valve, connect the probe lamp between the grey-red and brown-violet or brown-red wires.
4. Turn on the ignition.
5. With a working adjustment system, there is voltage in the circuit and the lamp will light up.
6. Check back: turn the knob to «heating» – the probe lamp should go out.
Conclusion: if the voltage supply is OK, but the fault in the heating system is not corrected, the cause is a faulty double valve (internal resistance 11-19 ohm). Replacement required.
7. If there is no voltage in the circuit when checking, measure the voltage in the circuit between the lead wire (grey-red) And «weight» (e.g. on the cylinder block).
8. Turn on the ignition. If there is no voltage, the current supply from the fuse is interrupted.
9. Contact check «masses» (from the control unit): connect a voltmeter between the pin «30» and brown-violet or brown-red wire of the connector. With the ignition on (regulator in position «cold») The device should show the battery voltage value. Otherwise, one of the elements of the heating control system is faulty (temperature sensor or control unit) or wire.
Checking the Temperature Sensor
10. Previously, you should remove the facing of the center console.
11. Connect an ohmmeter between both contacts at first right, then the left sensor. At various temperatures, the following resistance values \u200b\u200bshould be:
- at an air temperature of +20°С - 10–13 Ohm.
- at a temperature in the hand + 30°C - about 8 ohms. Otherwise, replace the sensor.
Checking the voltage supply to the control unit
12. Remove the regulator.
13. Connect a voltmeter to the terminals «11» And «12» connector on the back of the controller. With the ignition on, the instrument should show battery voltage values. Otherwise, check the supply circuit, including the fuse.
Regulator check
14. It is impossible to check the health of the regulator on your own. The authors proceed from the following: if the voltage supply, the valve and the temperature sensor are in order, the cause of the malfunction of the control system in the control unit.