Tempmatic (TM) diagnosis fault memory

AD83.40-S-4001B

Tempmatic (TM) diagnosis fault memory

22.10.98

Connection and use of test equipment

AD00.00-S-1000AZ

Connect Hand-Held Tester (HHT) and read out fault memory

AD00.00-S-2000-03A

Tempmatic (TM) - Diagnosis - background knowledge

AD83.40-S-2001A

a

Battery voltage 11 - 14 V

b

All plug connectors connected

c

All fuses in order

d

In the event of a fault being indicated, carry out the respective test procedure in the electrical test program

Fault memory

Fault code 

Fault text

Possible cause/note

Remedy



Evaporator temperature sensor

Short-circuit to ground

Short-circuit to plus or fault

AD83.40-S-6001-07A



Temperature sensor, Air discharge

Short-circuit to ground

Short-circuit to plus or fault

AD83.40-S-6001-08A



Pressure sensor, refrigerant, air conditioning regulation

Short-circuit to ground

Short-circuit to plus or fault

Short-circuit to ground

Short-circuit to plus or fault

AD83.40-S-6001-11B



CAN databus fault, Communication

AD83.40-S-6001-05A



Fault, auxiliary heater

Short-circuit to ground

Short-circuit to plus or fault

AD83.70-S-6000-74A



Fault, compressor clutch air conditioning system

Short-circuit to ground

Short-circuit to plus or fault

AD83.40-S-6001-06A



Fault, heater fan stage 1

Short-circuit to ground

Short-circuit to plus or fault

AD83.40-S-6001-04A



Fault, circulating valve

Short-circuit to ground

Short-circuit to plus or fault

AD83.40-S-6001-03A



Fault, auxiliary pump, heating water

Short-circuit to ground

Short-circuit to plus or fault

AD83.25-S-6001-02A



Fault, cycle valve, air conditioning system

Short-circuit to ground

Short-circuit to plus or fault

AD83.40-S-6001-09A



Fault, fan engine cooling (A34)

Engine 111.950/980 from 1.2.00 or 611.980 with air conditioning

Short-circuit to ground

Short-circuit to plus or fault

AD83.40-S-6001-10A



Fault, engine cooler module (A80)

Model 638.294 with Engine 104.900 with air conditioning

Short-circuit to ground

Short-circuit to plus or fault

AD83.40-S-6001-10B

AD83.40-S-6001-11A



Fault, max. heater mode not in order

Specified conditions not satisfied

AD83.40-S-6001-04A

AD83.25-S-6001-02A

AD83.40-S-6001-09A



Fault, max. cooling mode not in order

Specified conditions not satisfied

Engine speed < 600 RPM

Refrigerant pressure > 28 bar

Refrigerant pressure < 2 bar

Evaporator temperature < 2 °C

Cooling water temperature > 115 °C



Fault, band tests

Starting conditions not satisfied: Water temperature >70°C or resistance of the flame monitor resistance >1240Ω

Cables

Heater fan

Auxiliary heater flame monitor

Refrigerant temperature switch B94

Auxiliary pump, heating water

Flame formation in heater

Air bubbles in water circuit

AD83.40-S-6001-04A

AD83.70-S-6000-13B

AD83.70-S-6000-12B

AD83.70-S-6000-06B

AD83.70-S-6000-09B