AD83.70-S-6000-74A | ZHE test of electrical system air conditioning on signal from pushbutton control module |
| Scope of test | Measuring instrument/ Test connection | Operation/Requirement | Specified value | Possible cause/Remedy | ||
1.0 | Cable to climate control pushbutton control unit Open-circuit (For models 638.094/194/294 only) Open-circuit (For models 638.094/194/294 with codes MQ3,MQ4 and MQ5 only) |
A34.1 6 A87.1 6 | |
A20.2 10 A20.2 10 | Connector 2 disconnected from climate pushbutton control unit (A20) Connector 1 disconnected from auxiliary coolant heater (A34) Connector 2 disconnected from climate control pushbutton control unit (A20) Connector 1 disconnected from auxiliary coolant heater with heater booster function (A87) |
< 5 Ω < 5 Ω | Cables Connection to J108 1.1 Cables 1.1 |
1.1 | Short-circuit to ground (For models 638.094/194/294 only) Short-circuit to ground (For models 638.094/194/294 with codes MQ3, MQ4 and MQ5 only) |
| A34.1 A87.1 |
6 6 | Connector 2 disconnected from climate control pushbutton control unit (A20) Connector 1 disconnected from auxiliary coolant heater (A34) Connector 2 disconnected from climate control pushbutton control unit (A20) Connector 1 disconnected from auxiliary coolant heater with heater booster function (A87) |
> 20 kΩ > 20 kΩ | Short-circuit to ground 1.2 Short-circuit to ground 1.2 |
1.2 | Short-circuit to positive (For models 638.094/194/294 only) Short-circuit to positive (For models 638.094/194/294 with codes MQ3, MQ4 and MQ5 only) |
| A34.1 A87.1 |
6 6 | Connector 2 disconnected from climate control pushbutton control unit (A20) Connector 1 disconnected from auxiliary coolant heater (A34) Ignition: ON Connector 2 disconnected from climate control pushbutton control unit (A20) Connector 1 disconnected from auxiliary coolant heater with heater booster function (A87) Ignition: ON |
< 1 V < 1 V | Short-circuit to positive 1.3 Short-circuit to positive 1.3 |
1.3 | On and off switch signal (For models 638.094/194/294 only) (For models 638.094/194/294 with codes MQ3, MQ4 and MQ5 only) |
| A34.1 A87.1 |
6 6 | Connector 1 disconnected from auxiliary coolant heater (A34) Engine: RUNNING Press heater booster switch (A20s6) on climate control pushbutton control unit Press heater booster switch again Connector 1 disconnected from auxiliary coolant heater with heater booster function (A87) Engine: RUNNING Press heater booster switch (A20s6) on climate control pushbutton control unit Press heater booster switch again |
11 - 14 V < 1 V 11 - 14 V < 1 V | Auxiliary coolant heater Value in order Climate control pushbutton control unit Auxiliary coolant heater with heater booster function Value in order Climate control pushbutton control unit |