Check The Heating Pump (Removed) - Bosch SPS40C12GB Repair Instructions

Test
5.4

Check the heating pump (removed)

The customer service test programme is used to check the heating pump for all
possible faults. Incorrect measurements are displayed as error codes.
For measurements, see the circuit diagrams.
Prerequisite:
Heating pump has been removed. (Page 74)
Plug contacts may be damaged!
► Check the plug contact. (Page 40)
5.4.1 General procedure
1. 0 If the resistance does not agree with the value given in the circuit diagram
► Replace the defective part.
2. 0 If the resistance does agree with the value given in the circuit diagram
► check the line resistance R at the plug-in connections.
3. 0 If the line or plug-in connection is interrupted (R > 0)
► replace the defective cable harness.
4. 0 If the line is intact (R = 0)
► replace the defective power module. (Page 91)
2016-03-02 / DIS 840_58300000176874_ara_en_c
5.4.2 Checking the heating pump heater electrically
1. Measure the resistance of the heating at contact 4 - 5.
2. 0 If the resistance does not agree with the value given in the circuit diagram
► replace the defective heating pump (Page 74)
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