Signal Too Low

Signal too low

Checking the component and wiring




- Ignition off.
Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation.
Check the power supply cable (5 V) between engine control module (ECM) terminal #A15 (#A15) and throttle unit terminal #5 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground.

Hint: With the ignition on, the power supply to the throttle unit position sensor must be approximately 5 V measured between throttle unit connector terminals #3 and #5 (cable harness side).

Check the signal cable (position sensor 1) between engine control module (ECM) terminal #A96 (#B36) and throttle unit terminal #6 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground.
Check the signal cable (position sensor 2) between engine control module (ECM) terminal #A72 (#B12) and throttle unit terminal #4 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground.
If no faults are found and the diagnostic trouble code (DTC) recurs, try replacing the throttle unit.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting The Breakout Box, Engine Control Module (ECM)
- Signal specification Signal Specification, Engine Control Module (ECM)
- Throttle body Removal and Replacement
- Checking wiring and terminals Checking Wiring and Terminals














Continue - Verification

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Verification




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 reading off the position of the throttle.
Check that both sensors indicate values within the permitted range at different deployments.





Are these values within their permitted ranges?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - Fault Found

VERIFICATION FAILED - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - Exit Fault-Tracing

No - Attempt New Test

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Attempt New Test - Checking the component and wiring

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