AD83.70-W-6000-54B | AHE test of electrical system auxiliary heater control module wiring |
| Scope of test | Measuring instrument/ Test connection | Operation/Requirement | Specified value | Possible cause/Remedy | ||
1.0 | Auxiliary heater control unit (Z13) Cables |
A12 () | Z13 |
B10 | Ignition: OFF Heater unit: ON Carry out measurement at 13-pin plug connections A and B on control unit. | Value 22.5-29.5 V: 1.2 Value < 1 V: Open-circuit on input B10 1.1 | |
1.1 | Auxiliary heater control unit (Z13) Cables |
|
| Z13 B10 | Ignition: OFF Heater unit: ON Carry out measurement at 13-pin plug connection B on control unit and ground. | Value 22.5-29.5 V: Ground connection A12 (open-circuit) Ground cable to control unit (open-circuit). Value < 1 V: Cable / plug connection to timer (open-circuit). | |
1.2 | Auxiliary heater control unit (Z13) Cables |
A12 () | Z13 |
B12 | Ignition: OFF Heater unit: ON Carry out measurement at 13-pin plug connections A and B to control unit. | Value 22.5-29.5 V: 1.3 Value < 1 V: Cable / plug connection to fuse carrier (open-circuit). | |
1.3 | Auxiliary heater control unit (Z13) Cables |
A12 () | Z13 |
A13 | Ignition: OFF Heater unit: ON Carry out measurement at 13-pin plug connection A to control unit. | Value 22.5-29.5 V: Open-circuit or fault on/in control unit. Inspect plug connection on control unit, replace control unit (Z13) on trial if necessary. Value < 1 V: Cable / plug connection to timer (open-circuit). | |