Faulty Signal
Faulty signal
Fault-tracing information
Fault-tracing information
Fault-tracing information
Caution! The male and female pins on the electronic throttle unit connectors are gold plated. Great care must be taken when measuring. Damage to the gold plating can result in operating difficulties.
Continue - cont
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cont - Checking the diagnostic trouble codes (DTCs)
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Checking the diagnostic trouble codes (DTCs)
- Ignition on.
Read off diagnostic trouble codes (DTCs).
Check whether one or more of the following codes are stored: ECM-9150, ECM-9160, ECM-9170, ECM-903C or ECM-9100.
Are any of the above diagnostic trouble codes (DTCs) stored?
Yes - Fault-tracing information
No - Checking the component and wiring
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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 resistance values of the potentiometers in the throttle unit and damper motor winding.
Note! The resistance of the motor winding in the damper motor is very low.
Replace the throttle unit if necessary.
Check damper motor (+) and (-) cables. Check for an open-circuit. Check for a short-circuit to ground or supply voltage.
Check between:
- Engine control module (ECM) terminal #A74 (#B14) and throttle unit terminal #4
- Engine control module (ECM) terminal #A75 (#B15) and throttle unit terminal #1.
Also check the damper motor cables (+) and (-). Check for a short-circuit to each other.
Check that the shutter in the throttle unit is not blocked or sticking. Clean as necessary.
The throttle unit is damaged if the diagnostic trouble code (DTC) recurs.
Note! If the throttle unit is replaced it must be adapted. See VIDA vehicle communication (Throttle unit adaptation).
Other information
- Connecting the breakout box Connecting The Breakout Box, Engine Control Module (ECM)
- Signal specification Signal Specification, Engine Control Module (ECM)
- Component specifications [1][2]Electrical Specifications
- Throttle body, cleaning Procedures
- Throttle body Removal and Replacement
- Checking wiring and terminals Checking Wiring and Terminals.
Continue - Fault-tracing information
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Fault-tracing information
Remedy stored diagnostic trouble code(s) (DTCs).
Remedy as necessary.
Continue - DONE
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Fault-tracing information
Information
Fault-tracing information
In case of this defect, troubleshooting is not followed by verification.
The information can be displayed again or the fault-tracing for this fault can be interrupted.
Do you want to view the information again?
Yes - Attempt New Test
No - Fault Found
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Attempt New Test - Fault-tracing information
Fault Found - DONE
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