Signal Too High / Signal Missing

Signal too high / Signal missing

Checking the component and wiring
Check the signal cable for the relay for the electric engine block heater. Check between accessory electronic module (AEM) terminal #B5 and the connector for the relay. Check for a short-circuit to supply voltage. Check for an open-circuit.
Check the ground lead for the relay for the electric engine block heater. Check between accessory electronic module (AEM) terminal #B4 and the connector for the relay. Check for an open-circuit.
Remedy as necessary.

Other information:
- Connecting the breakout box Connecting The Breakout Box, Accessory Electronic Module (AEM)
- Signal specification Signal Description, Accessory Electronic Module (AEM)
- Relay electrical engine block heater, replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals









Continue - Verification

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Verification




Verification

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








- Ignition off
- Reconnect the components, connectors etc.
- Ignition on.
Check the function of the electric engine block heater.

Does the system function?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - Fault-tracing information

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Fault-tracing information

FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the component and wiring

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