AD83.70-S-6000A | Auxiliary heater (AHE) test of electrical system | 16.4.97 |
MODEL 638 up to 15.11.97 with CODE (H12) Hot water auxiliary heater
| Connecting and using test equipment | ||
| Auxiliary heater, diagnosis, basic knowledge | ||
| Auxiliary heater connector assignment | ||
| Auxiliary heater diagnostic tools | ||
| Test steps 1-6 can be performed without disassembling the heater. For some test steps two measuring points are specified - one measuring point on connector A34.1 and one on the auxiliary heater control module (connectors A and B). This is intended to allow quick entry into diagnosis when the power supply is not present. A34.1 is accessible without unscrewing the heater. If the malfunction cannot be determined during the first step, measure directly on control module. | ||
| In the event of a malfunction check the cables, fuses, plugs and connectors for discontinuity, good contact and proper connection according to the applicable wiring diagram | ||
a | Battery voltage 11 - 14 V | ||
b | All connectors connected | ||
c | All fuses okay | ||
Testing | |||
1 | Auxiliary heater control, electrical test, auxiliary heater | ||
2 | Heater, electrical test, auxiliary heater | ||
3 | Switch-on signal from control, electrical test, auxiliary heater | ||
4 | Diagnosis lead, electrical test, auxiliary heater | ||
5 | Fan control, electrical test, auxiliary heater | ||
6 | Auxiliary pump control, electrical test, auxiliary heater | ||
7 | Auxiliary heater relay, electrical test, auxiliary heater | ||
8 | Water pump, electrical test, auxiliary heater | ||
9 | Glow plug, electrical test, auxiliary heater | ||
10 | Fuel metering pump, electrical test, auxiliary heater | ||
11 | Overheating cutout, electrical test, auxiliary heater | ||
12 | Coolant temperature switch, electrical test, auxiliary heater | ||
13 | Flame monitor, electrical test, auxiliary heater | ||
14 | Combustion air blower, electrical test, auxiliary heater | ||
15 | Load relay for combustion air blower, electrical test, auxiliary heater | ||
16 | Partial load resistor, electrical test, auxiliary heater |
Referenced documents
- ad0000s1000az Connection and use of testing equipment
- ad8370s200001a Auxiliary heater (AHE), connector assignment
- ad8370s200002a Auxiliary heater (AHE), diagnosis tools
- ad8370s2000a Auxiliary heater (AHE), diagnosis, basic knowledge
- ad8370s600001a Auxiliary heater control, electrical test, auxiliary heater
- ad8370s600002a Heater, electrical test, auxiliary heater
- ad8370s600003a Switch-on signal from control, electrical test, auxiliary heater
- ad8370s600004a Diagnosis lead, electrical test, auxiliary heater
- ad8370s600005a Fan control, electrical test, auxiliary heater
- ad8370s600006a Auxiliary pump control, electrical test, auxiliary heater
- ad8370s600007a Auxiliary heater relay, electrical test, auxiliary heater
- ad8370s600008a Water pump, electrical test, auxiliary heater
- ad8370s600009a Glow plug, electrical test, auxiliary heater
- ad8370s600010a Fuel metering pump, electrical test, auxiliary pump
- ad8370s600011a Overheating cutout, electrical test, auxiliary heater
- ad8370s600012a Coolant temperature switch, electrical test, auxiliary heater
- ad8370s600013a Flame monitor, electrical test, auxiliary heater
- ad8370s600014a Combustion air blower, electrical test, auxiliary heater
- ad8370s600015a Load relay for combustion air blower, electrical test, auxiliary heater
- ad8370s600016a Partial load resistor, electrical test, auxiliary heater
- pe8300s1100a Survey of wiring diagrams of climate control