AD83.40-S-3003A | Tempmatic (TM) diagnosis, function check | 9.9.98 |
MODEL 638.094 /194 /294 with CODE (H06) Air conditioning
| Tempmatic (TM) diagnosis, previous knowledge | ||
| Notes on TM function | ||
Function check | |||
Scope of test | Operation / requirement | Specified value | Possible cause / remedy |
1 Heater operation | Engine idling Rotary or digital switch on maximum setting Adjust heater blower to step 1 | Cycle valve is opened (no current) Blower temperature increases in line with the coolant temperature |
Rotary or digital switch in climate control pushbutton control unit (A20) |
2 Heater operation | Engine idling Rotary or digital switch on minimum setting Adjust heater blower to step 1 | Cycle valve closes (current flows) Blower temperature falls |
Rotary or digital switch in climate control pushbutton control unit (A20) |
3 Cooler operation | Engine idling Press air conditioning system switch A2s5 Rotary or digital switch on minimum setting | Heater blower step 1 automatically switches on Air conditioning system function lamp illuminated Air conditioner compressor coupling switches on Blower temperature clearly falls | |
4 Climate control shut-off | Press air conditioning system switch A2s5 again | Air conditioning compressor coupling switches itself off | Short-circuit to positive on cables |
5 Air circulation flap | Press air circulation switch (A20s3) | Air circulation function lamp illuminated Air circulation flap switches over |
Air circulation switch (A20s3) |
6 Residual engine heat utilization system | Ignition: OFF Press residual engine heat utilization switch (A20s7) | Residual engine heat utilization function lamp illuminated Heater blower step 1 automatically switches on A/C control auxiliary coolant heater pump automatically switches on Temperature control is active Interior temperature sensor draws air from the interior Cycle valve pulsates in line with the temperature selection switch | |
7 Residual engine heat utilization system | The residual engine heat utilization system will switch itself off under the following conditions: Switch on ignition Press residual engine heat utilization system switch (A20s7) again Duration of maximum utilization time of residual engine heat utilization system (approx. 30 min) With the reduction of the battery voltage to 11.5 V | Residual engine heat utilization function lamp goes out Residual engine heat utilization functions are switched off | |
8 Heater booster function | Engine idling Press heater booster switch (A20s6) | Heater booster function lamp illuminated |
Heater booster switch (A20s6) |
9 Heater blower | Ignition: ON Position blower knurl (A20s2) in settings 1 to 4 | The blower runs in the four different speeds |