CEM-5A13

Over heated

Checking the status




- Ignition on.
Click the VCT2000 symbol to activate the blower fan 100 %.
Check if the fault is permanent or intermittent.
The fault is permanent if the blower fan does not activate.
If the blower fan is activated, this is an indication that the fault was present previously but that it is not active at the moment, i.e. the fault is intermittent.





Continue - Checking the component and wiring

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Checking the component and wiring
Check the voltage supply level to the blower fan.
Take readings between:
- Blower fan connector terminal #1 and ground.
If the voltage exceeds 19 volts, the blower fan stops.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- Temperature sensor passenger compartment Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals









Was a fault detected?

Yes - Verification

No - Signal too high

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Signal too high





Signal too high

Checking the wiring








- Ignition off
- Connect the breakout box to the central electronic module (CEM)
- Start the engine.
Check the 30-supply to central electronic module (CEM) terminal #E27 (#27) and #D10 (#10). The voltage must not exceed 15 volts at 2,000 rpm.
Also check that the battery is not over-charging.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- Checking wiring and terminals Checking Wiring and Terminals





Continue - Fault-tracing information

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Verification




Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the connectors, components etc.
- Start the engine.
Read off the 30-supply by clicking the VCT2000 symbol.
Check whether the value is within the permitted range, the normal value when the generator is loading: 13.0-14.5 V.





Is the value OK?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - Attempt New Test

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Fault-tracing information

Attempt New Test - Signal too high

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Signal too high

Checking the wiring








- Ignition off
- Connect the breakout box to the central electronic module (CEM)
- Start the engine.
Check the 30-supply to central electronic module (CEM) terminal #E27 (#27) and #D10 (#10). The voltage must not exceed 15 volts at 2,000 rpm.
Also check that the battery is not over-charging.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- Location of components Component Location, Central Electronic Module (CEM)
- Checking wiring and terminals Checking Wiring and Terminals





Continue - Verification

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Verification
Verification
VERIFIED - FAULT FOUND

VERIFICATION FAILED - Fault-tracing information

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Fault-tracing information

Attempt New Test - Checking the wiring

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Verification




Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Activate the blower fan.
Check that the function is OK.

Is the function OK?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - Fault-tracing information

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Fault-tracing information

Attempt New Test - Checking the component and wiring

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