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 - Checking diagnostic trouble codes (DTCs)
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Checking 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 components and wiring
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Checking components 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 the cable (+) for the damper motor between engine control module (ECM) terminal #A35 (#A35) and throttle unit terminal #4 (wiring side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.
Check the cable (-) for the damper motor between engine control module (ECM) terminal #A36 (#A36) and throttle unit terminal #1 (wiring side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.
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 defective if the diagnostic trouble code (DTC) recurs.
Note! If the throttle unit is replaced it must be adapted. See: Throttle unit adaptation" in the vehicle communication socket.
Other information:
- Checking wiring and terminals Checking Wiring And Terminals
- To connect the breakout box, see Connecting the breakout box, B5244T5, B5254T2 Connecting the Breakout Box
- For resistance values, see Component specifications Specifications
- For information about signals on 5 cylinder engines, see Signal specification Signal Description / Specification
- For information about signals on 6 cylinder engines, see Signal specification Signal Description / Specification
- To access or replace the throttle unit, see Throttle body (electronic throttle module (ETM)), replacing Removal and Replacement
- To clean the throttle unit, see Throttle body (TB), cleaning Procedures.
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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