Checking The Throttle Unit
Use the diagnostic trouble codes' frozen values as well as the counters, to determine the driving conditions when the problem was detected the first time and how often the problem has occurred. The values show the problem's current status and how intermittent the problem is. Check if the diagnostic trouble code has been generated during engine start and if the battery voltage was very low at that time.
If the trouble code was stored when battery voltage was low and engine speed was close to 0 RPM when the fault occurred, it could indicate that the fault arose when the vehicle was stationary with the ignition on for a long period, thereby draining the battery, or that the fault arose due to battery voltage becoming low when the customer started the engine. This, in turn, indicates that the battery's charging status is not OK.
Check the battery charge status, connections to the battery and chassis and the battery cables for contact resistance and oxidation.
Remedy as necessary. Otherwise, continue as follows.
If the frozen values indicate that battery voltage was OK, try a new throttle unit (ETM).
Remedy as necessary.
Other information
- See Throttle body (electronic throttle module (ETM)), replacing
- See Identifying upgraded software ECM/ETM
- See Checking wiring and terminals
In order for Electronic throttle module (ETM) to reset any reconfigurations as well as delete internally stored problems, the following must be performed:
- Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM).
- Then turn on the ignition and turn it off again.
- Wait another three minutes. If the electric cooling fan is running, you have to wait another two minutes after the electric cooling fan has stopped, to make sure that Electronic throttle module (ETM) has been shut off correctly.
If this is not done correctly, diagnostic trouble codes may remain even after deleting diagnostic trouble codes and any reconfiguration may remain, despite the problem being fixed.