2001 V70XC - Random stall when coming to a stop... Topic is solved

Post by **xHeart** » 18 Feb 2019, 15:03

Working my way through solving the two Accelerator Pedal related DTCs. Four readouts of all ETM parameter before removing accelerator pedal this weekend.

Engine OFF, Key POS II:

: MVS_ETM_KeyPos2.png.png (63.68 KiB) Viewed 1838 times

Engine idling close to 1000 RPM:

: MVS_ETM_EngineIdle1.png.png (66.12 KiB) Viewed 1838 times

Engine idling and settles near 700 RPM:

: MVS_ETM_EngineIdle2.png.png (65.99 KiB) Viewed 1838 times

Few minutes later engine cuts off by itself:

: MVS_ETM_cutoff.png.png (66.39 KiB) Viewed 1838 times

Post by **prwood** » 18 Feb 2019, 20:45

When the ETM on my '01 V70 was dying, it threw a few accelerator pedal-related codes. After having the ETM rebuilt, the accelerator pedal codes went away, so I'm fairly certain nothing was wrong with the pedal or pedal sensor in my case. I think it was just one way the ETM tried to interpret the data it was seeing.

I also frequently saw the absolute throttle position at 20% when the car was in limp mode.

Post by **abscate** » 19 Feb 2019, 02:21

That should be documented here , somewhere...

What is the throttle plate position for limp mode?

Jimmy might know this.

Post by **xHeart** » 19 Feb 2019, 10:54

abscate wrote: 19 Feb 2019, 02:21 That should be documented here , somewhere...

What is the throttle plate position for limp mode?

Jimmy might know this.

Found this viewtopic.php?t=87043

Post by **abscate** » 19 Feb 2019, 11:10

Hmmm

Turbo limp throttle angle 20%

Non Turbo limp throttle angle 16%

Nominal numbers

Post by **xHeart** » 19 Feb 2019, 11:22

abscate wrote: 19 Feb 2019, 11:10 Hmmm

Turbo limp throttle angle 20%

Non Turbo limp throttle angle 16%

Nominal numbers

Found this: https://xemodex.com/us/pdf/ETM%20Flow%2 ... -final.pdf

Post by **xHeart** » 20 Feb 2019, 05:12

prwood wrote: 18 Feb 2019, 20:45 When the ETM on my '01 V70 was dying, it threw a few accelerator pedal-related codes. After having the ETM rebuilt, the accelerator pedal codes went away, so I'm fairly certain nothing was wrong with the pedal or pedal sensor in my case. I think it was just one way the ETM tried to interpret the data it was seeing.

I also frequently saw the absolute throttle position at 20% when the car was in limp mode.

IF Limp Home is a "SAFETY" feature THEN something is triggering ECM-9180: Accelerator Pedal Fault -- limiting power to gas pedal.

VIDA's ETM test procedure says something like "a 13º (%) angle difference requires replacing throttle module". I'll try ETM test tonight.

Post by **abscate** » 20 Feb 2019, 05:15

Is that difference between requested and actual?

This might Be the best diagnostic for detecting limp mode we have found yet

Xheart, can you add the ECM CODES and P codes to this thread? I can map the P codes if you have the ECM

Post by **xHeart** » 20 Feb 2019, 07:53

abscate wrote: 20 Feb 2019, 05:15 Is that difference between requested and actual?

This might Be the best diagnostic for detecting limp mode we have found yet

Xheart, can you add the ECM CODES and P codes to this thread? I can map the P codes if you have the ECM

I will.
Someone like precopster is more familiar with "difference".
Mike Lucas aka precopster video [youtube][/youtube]

Post by **abscate** » 20 Feb 2019, 11:32

Its sounds like difference between the measured film sensors that is allowed?

Mike has a Kingfisher stuck in his throttle body.

Added ETM part number to thread for bookmarking the great video on ETM
Also referenced it in ETM Room