'90 240 check engine light but no codes

[James Sweet]

So the check engine light has been on in my friend's 240 for a couple
weeks and he says the fuel economy has been lousy. I checked for fault
codes and it flashes 1-1-1 which I gather means no codes are stored.

I've never dealt with one this "new" so I'm not terribly familiar with
it, but shouldn't anything that turns the check engine light on also
store a code?

 

[Stephen Henning]

So the check engine light has been on in my friend's 240 for a couple
weeks and he says the fuel economy has been lousy. I checked for fault
codes and it flashes 1-1-1 which I gather means no codes are stored.

I've never dealt with one this "new" so I'm not terribly familiar with
it, but shouldn't anything that turns the check engine light on also
store a code?

Sure, if the computer was OK. No codes, can always be a defective
computer. If the computer is defective, it might not be able to know
what code to flash.

The codes for 1989 to 1993 Volvos are at
http://www.troublecodes.net/Volvo/

 

[Telespalla Bob]

James Sweet ha scritto:

So the check engine light has been on in my friend's 240 for a couple
weeks and he says the fuel economy has been lousy. I checked for fault
codes and it flashes 1-1-1 which I gather means no codes are stored.

I've never dealt with one this "new" so I'm not terribly familiar with
it, but shouldn't anything that turns the check engine light on also
store a code?

Hi, was checked both injection and ignition system?
Both ecu says "111"?

 

[James Sweet]

James Sweet ha scritto:

Hi, was checked both injection and ignition system?
Both ecu says "111"?

Does the ignition control unit store codes separately? How does one
check those? I thought everything was accessed through the one OBD
interface?

I used instructions I found online. Plug the probe into port 6 of the
diagnostic socket with the ignition key set to accessory and push the
button for 1.5sec, at which point I get three evenly spaced blinks.

OBD is cool, but it's a luxury I've never had.

 

[GlennK]

Does the ignition control unit store codes separately? How does one
check those? I thought everything was accessed through the one OBD
interface?

I used instructions I found online. Plug the probe into port 6 of the
diagnostic socket with the ignition key set to accessory and push the
button for 1.5sec, at which point I get three evenly spaced blinks.

OBD is cool, but it's a luxury I've never had.

A2 is Fuel Side
A6 is Ignition Side
Do the same for A2 & this is where you will find your code or codes
write them down so you do not lose track of what you started with
Glenn K
Volvo Certified Technician 2008
ASE Certified Technician 2008

 

[GlennK]

Does the ignition control unit store codes separately? How does one
check those? I thought everything was accessed through the one OBD
interface?

I used instructions I found online. Plug the probe into port 6 of the
diagnostic socket with the ignition key set to accessory and push the
button for 1.5sec, at which point I get three evenly spaced blinks.

OBD is cool, but it's a luxury I've never had.

A2 is Fuel Side
A6 is Ignition Side
Do the same for A2 & this is where you will find your code or codes
write them down so you do not lose track of what you started with
Glenn K
Volvo Certified Technician 2008
ASE Certified Technician 2008

 

[GlennK]

Does the ignition control unit store codes separately? How does one
check those? I thought everything was accessed through the one OBD
interface?

I used instructions I found online. Plug the probe into port 6 of the
diagnostic socket with the ignition key set to accessory and push the
button for 1.5sec, at which point I get three evenly spaced blinks.

OBD is cool, but it's a luxury I've never had.

A2 is fuel
A6 is Ignition Side

 

[James Sweet]

A2 is Fuel Side
A6 is Ignition Side
Do the same for A2 & this is where you will find your code or codes
write them down so you do not lose track of what you started with
Glenn K
Volvo Certified Technician 2008
ASE Certified Technician 2008

Ah, that's what I needed, thanks! Hopefully I'll have a chance to check
it out this weekend.

 

[James Sweet]

A2 is Fuel Side
A6 is Ignition Side
Do the same for A2 & this is where you will find your code or codes
write them down so you do not lose track of what you started with
Glenn K
Volvo Certified Technician 2008
ASE Certified Technician 2008

So I finally had a chance to check this and it gave me 213. From what I
can tell, that's TPS signal stuck full rich, which would explain the
lousy fuel economy. I didn't have my multimeter with me so I couldn't
test the switch. Does a '90 have the older style TPS that is just a
couple of switches, or is it the later style potentiometer?