The message to which you are about to reply is shown first. GO TO REPLY FORM



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

016 AMM burn off details? 200 1989

posted by  Frodo on  Mon Nov 11 08:52 CST 2002
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

Hi, I have a AMM that might be bad.
I bought a secondhand 240 wagon and have tried to fix all the small troubles. Seeing the aluminum tube from the airbox disconnected, I connected it to the manifoil... Guess what, now the idle are 1000-1500 rpm, if I disconnect the AMM it is a steady 800 rpm.

What I want to know is details about the burnout function, is it controlled inside the AMM? I know the ECU (LH 2.4) should be sending a 4V signal on AMM pin 4 (not sure, someone borrowed my manual), but I measure 18Kohm resistance between pin 4 and 1+2, that means the platinum-wire is not connected directly to pin 4. Is this 4V signal just a trigger to the internal burn-out circuit pouring current through the wire?

I was wondering if it was possible with a manual burnout off the car...

Measuring 3-4 ohm between pin 3 and 1+2, I think this is the wire, but I don't dare to push current into the signal output and damage some circuit.


I have opened the ECU and fuel relay and soldered all questionable pins, used contact-cleaner on all connectors from AMM to ECU.

AMM voltage is 2.3V when idling in 1100 rpm (temperature 2 degrees C), O2 signal lays below 0.5V when warm.

I have heard about adding a 0.2 ohm resistor between pin 1 and earth to test AMM. Does anyone know where pin 1 is connected to earth, I dont want to cut the wire?





USERNAME
Use "claim to be" below if you don't want to log in.
PASSWORD
I don't have an account. Sign me up.
CLAIM TO BE
Use only if you don't want to login (post anonymously).
ENTER CAPTCHA CODE
This is required for posting anonymously.
OPTIONS notify by email
Available only to user accounts.
SUBJECT
MODEL/YEAR
MESSAGE

DICTIONARY
LABEL(S) +
IMAGE URL *
[IMAGE LIBRARY (UPLOAD/SELECT)]

* = Field is optional.

+ = Enter space delimited labels for this post. An example entry: 240 muffler


©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.