C Compressor Control High Or Open (Active) - Mercedes-Benz Sprinter 2003 Manual

HEATING & A/C
Symptom:
A/C COMPRESSOR CONTROL HIGH OR OPEN (ACTIVE)
A/C COMPRESSOR CLUTCH CONTROL CIRCUIT SHORTED TO VOLTAGE
A/C COMPRESSOR CLUTCH
A/C COMPRESSOR CLUTCH CONTROL CIRCUIT OPEN
AUTOMATIC TEMPERATURE CONTROL (ATC)
TEST
1 Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the A/C Compressor Clutch harness connector.
Turn the ignition on.
Press the Air Conditioning switch off.
Measure the voltage of the A/C Compressor Clutch Control circuit.
Is the voltage above 10.0 volts?
Yes → Go To 2
→ Go To 4
No
2 Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Automatic Temperature Control (ATC) C1 harness connector.
Disconnect the A/C Compressor Clutch harness connector.
Turn the ignition on.
Measure the voltage of the A/C Compressor Clutch Control circuit.
Is the voltage above 0.2 volts?
Yes → Repair the A/C Compressor Clutch Control circuit for a short to
→ Go To 3
No
3 Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Reconnect the Automatic Temperature Control (ATC) C1 harness connector.
Reconnect the A/C Compressor Clutch harness connector.
Verify that the A/C Compressor Clutch Ground is clean and tight.
Turn the ignition on.
With the DRBIII , erase DTCs.
Turn the ignition off, wait 5 seconds, then turn the ignition on.
With the DRBIII , read Automatic Temperature Control DTCs.
Does the DRBIII display: A/C COMPRESSOR CONTROL HIGH OR OPEN?
Yes → Replace the A/C Compressor Clutch in accordance with the
→ Test Complete.
No
POSSIBLE CAUSES
ACTION
voltage.
Perform BODY VERIFICATION TEST - VER 1.
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
126
APPLICABILITY
All
All
All