What is Volvo ETM?
Volvos affected by the electronic throttle module (“ETM”) are 1999-2002 models (US model years). Before 1999, Volvo used a good old mechanical set of parts to control the throttle. In 1999, they switched to a “fly-by-wire” module… this problematic ETM. This design affects almost a half-million Volvo gasoline cars.
How do you know if the throttle position sensor is bad?
Symptoms of a Bad or Failing Throttle Position Sensor
- Car won’t accelerate, lacks power when accelerating, or accelerates itself.
- Engine won’t idle smoothly, idles too slowly, or stalls.
- Car accelerates, but won’t exceed a relatively low speed, or shift up.
What is an ETM on a car?
Oct 2019 | 0 comments. Unlike the old butterfly mechanical throttle bodies, when all you needed was a screwdriver to adjust the idle, electronically controlled throttle modules started in 1999 for Volvo models S70, V70 AND XC70.
What to do if your ETM fails on a Volvo?
Common ETM – Electronic Throttle Module failure symptoms on 1998 – 2002 Volvo are: – Clean your ETM. This may work if your ETM is not yet damaged on the internal contacts – Source a new one from a Volvo dealer. This is the most simpler but also the much costier solution – Source a good used one…
Where are the potentiometers on a Volvo ETM?
In this mode you will experience poor engine performance, poor throttle response and the car will not exceed 40MPH. Each ETM contains two separate potentiometers located on either side of the throttle shaft in the plastic end caps.
Why does Volvo ETM switch to limp home mode?
The fundamental flaw with this design is that the carbon layer’s chemical composition is not strong enough to withstand continuous wiper friction. As a result, the wiper scrapes off the carbon run right down to the substrate, creating an open circuit which causes the ETM to switch to limp-home mode.
How do you remove ETM from a car?
In order to remove the ETM, you should do as follows: 1. Disconnect the negative battery cable 2. Removing the intake charge air pipe that goes above the engine 3. Remove the dipstick and dipstick tube 4. Remove the inlet pipe to the air filter housing. 5.