Manufacturer Code Charts: 2002
M44 (charge air cooler circulation pump) : Output stage
Possible cause:
- M44 (charge air cooler circulation pump)
Affected functions:
- Engine output
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Test 1: Check component M44 (charge air cooler circulation pump).
1. Check component M44 (charge air cooler circulation pump).
Test 1.1: Check component M44 (charge air cooler circulation pump) by means of actuation.
Test 1.2: Test current consumption of component M44 (charge air cooler circulation pump).
Test 1.3: Check low-temperature circuit.
1.1. Check component M44 (charge air cooler circulation pump) by means of actuation.
Test sequence
- Ignition ON
- Actuate component M44 (charge air cooler circulation pump).
Actuate with key F2.
Warning!Communication with ECU required.
1.2. Test current consumption of component M44 (charge air cooler circulation pump).
Test prerequisite
- The actuation was not okay.
Test sequence
- Check fuse N10/2f116 (Fuse 116).
Question
- Is fuse N10/2f116 (Fuse 116) OK?
YES
Test prerequisite
- Component M44 (charge air cooler circulation pump) does not run.
Test sequence
- Switch off ignition.
- Detach component N10/2kQ (Circulation pump relay).
- Insert bridge for actuating component M44 (charge air cooler circulation pump).Bridge pin 3 and pin 5.(See fig.2)
- Use fuse cable for bridge.
- Measurement with multimeter
- Remove fuse N10/2f116 (Fuse 116).
- Measure direct current with multimeter between sockets (N10/2f116) 1 and (N10/2f116) 2
- Switch on ignition.
Component M44 (charge air cooler circulation pump) runs.Specified value
- Amperage 3.0...5.0 A
Question
- Is the measurement value OK?
YES
The measurement value is OK.Possible cause and remedy
- N10/2kQ (Circulation pump relay)
End of test
NO
The measurement value is not OK.Possible cause and remedy
- Line from component N10/2f116 (Fuse 116) to component M44 (charge air cooler circulation pump)
- M44 (charge air cooler circulation pump)
- Check low-temperature circuit.
End of test
NO
The fuse is not o.k.Possible cause and remedy
- Test cable N10/2f116 (Fuse 116) to M44 (charge air cooler circulation pump) for Short circuit to ground.
- Visually inspect cable, repair or replace if necessary.
- M44 (charge air cooler circulation pump)
End of test
1.3. Check low-temperature circuit.
Information
- The low temperature coolant circuit cap may only be opened when the low temperature circuit is cold (ambient temperature).To cool the low temperature circuit quickly, detach component N10/2kQ (Circulation pump relay) and link circuits 30 and 87.At the same time, actuate the electric suction fan via DAS.
Continue to test with button F2
Note
- WIS is not available on this system.
- It is not possible to display the requested WIS document [ ar2000p1145h ].
- You can start WIS on another system and display the WIS document by entering the document number [ ar2000p1145h ] in the 'Contents' field.
1.3. No further information available.