Faulty Signal

ECM-9150 THROTTLE UNIT, INTERNAL FAULT
FAULTY SIGNAL

Symptom check



Check that the connector terminals for the electronic throttle module are OK. Check that there is voltage to the throttle unit from the system relay.

Check that the battery voltage is normal. Check that the charging status of the battery is OK.

In certain specific cases, to determine if the fault is permanent or intermittent, the engine must be started and stopped up to three times (to force the fault to occur). Cancel when the symptoms appear. The symptom check must be carried out with the engine running.

Hint: Check for symptoms between each start of the engine. See the fault code information.

Note! The voltage supply to the electronic throttle module must be interrupted to empty the memory between each start.

Hint: Stop the supply voltage to the electronic throttle module by removing the affected fuse or the connector, whichever is easiest depending on the engine variant. See the fuses In the integrated relay/fusebox in the engine compartment.

For the appropriate symptoms, see diagnostic trouble code (DTC) information.

Read off diagnostic trouble codes (DTCs) with the engine running.

1.If the diagnostic trouble code (DTC) recurs singly
2.If the diagnostic trouble code (DTC) recurs together with ECM-9160
3.If no symptoms can be obtained.

Select a suitable alternative!
1 - Continue below.
2 - Skip to "Checking the electronic throttle module (ETM) and software"
3 - Fault-tracing information
The throttle unit has previously registered a fault, but had detected that the fault no longer exists.
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.


Replacing the throttle unit and programming
The electronic throttle module has registered an internal fault. Registration has occurred in the engine control module (ECM). Try a new electronic throttle module.

Caution! A new electronic throttle module is delivered without software. The electronic throttle module must be programmed when it has been replaced in order to function.


Fault-tracing information
Fault-tracing is not followed by verification for this fault.

Testing Complete.


Checking the electronic throttle module (ETM) and software
Thoroughly check the throttle for dirt and sticking. Check that no objects are blocking the throttle. Check for dirt and sticking visually by pressing the throttle disc to change the angle.

Hint: Small objects can cause the throttle disc to jam momentarily, this can cause the diagnostic trouble code (DTC).

Note! A film of oil covering the throttle may be an indication that the nipple between the intake manifold and the flame trap needs to be cleaned. Always clean the nipple if the throttle is covered in a film of oil.

Read off the software number in the electronic throttle module (ETM) by clicking the VCT2000 symbol. Always check that the software number corresponds to the latest VOLVO software. See the service information for information about the latest software.

Hint: The diagnostic trouble code (DTC) may be the result of a faulty electronic throttle module (ETM). If the diagnostic trouble code (DTC) persists, despite the above checks and remedies, try a new electronic throttle module (ETM).

Caution! A new throttle unit is delivered without software. For the throttle unit to function after replacement, it must be programmed.

Other information:
- Checking wiring and terminals, [1][2]Checking Wiring and Terminals
- Select the software manager to download the software
- See other service information for the relevant action code
- To access or replace the electronic throttle module (ETM), Throttle Body (Electronic Throttle Module), Replacing