|
200 Series General Forum for the Volvo 240 and 260 cars |
Information |
|
A guide to reading fault codes on your 1990-1993 240Views : 33280 Replies : 12Users Viewing This Thread : |
|
Thread Tools | Display Modes |
|
Apr 18th, 2011, 11:29 | #1 |
Stay gold baby!
Last Online: Jul 24th, 2022 16:15
Join Date: May 2009
Location: Bristol
|
A guide to reading fault codes on your 1990-1993 240
For those of us who have a late 240, specifically those made from 1990-1993 fitted with Bosch LH-Jetronic 2.4 fuel injection, I'm sure we've all seen and experienced the horrors of the lambda light. What this light actually means is that one of the engine computers has detected a fault somewhere in the engine management system and is alerting you to its presence BEFORE any damage is done as a result. This post will explain how to use the self-diagnostic function to read codes and diagnose problems indicated by the lambda light.
TERMINOLOGY: ECU: the Engine Control Unit, which is a computer located on the right of the driver's side footwell. this computer controls fuel delivery to the engine. EZK: a smaller ECU located on the passenger side firewall that controls spark timing for the engine. Right, so you've go the dreaded lambda light illuminated on your dash. The car may seem to be running fine, it may be running rough. No matter, the light is telling you the ECU or EZK has detected a fault. What we're going to do is find out what the computers think is wrong. The first step is to open the bonnet: The arrow points to the diagnostic box. If you take a closer look, it looks like this: Pull the lid off the box, and you're presented with six sockets, a diagnostic probe, an LED and a button: With the ignition turned off, insert the probe into socket 2 (to read codes from the fuel ECU) or socket 6 (to read codes from the EZK). Turn the ignition to key position 2 without starting the engine. Press down the button on the diagnostic box for about 2 seconds, and the LED on the box should flash out a three-digit code, i.e 3 flashes, space, 2 flashes, space, 1 flash would be code 3-2-1. After reading the code, depress the button again for 2 seconds to see if further codes are stored. If the same code repeats, there are no further fault codes stored. It is also worth noting that not all fault codes cause the lambda light to illuminate. If you're having running difficulties, it's worth checking to see if there are any stored codes which could point you the right way. Below is a list of all the fault codes that can be stored: ECU: 1-1-1 - No faults 1-1-2 - ECU internal fault 1-1-3 - Lambda control - engine running too rich/lean 1-2-1 - Mass air flow meter signal faulty or missing 1-2-2 - Air temperature sensor signal faulty or missing 1-2-3 - Coolant temperature sensor signal missing or faulty 1-3-1 - RPM signal from EZK missing 1-3-2 - Battery voltage too low or high 1-3-3 - Throttle position sensor idle setting faulty 1-5-4 - Exhaust Gas Recirculation flow too high 2-1-2 - 02 (lambda) sensor signal missing or faulty 2-1-3 - Throttle position sensor full load setting faulty 2-2-1 - Lambda control - engine running too lean at part load 2-2-2 - Main relay faut 2-2-3 - Idle Air Control valve signal missing 2-3-1 - Lambda control - too lean or too rich at part load 2-3-2 - Lambda control - too lean or too rich at idle 2-3-3 - Idle air flow outside control range 3-1-1 - Speedometer signal to ECU missing 3-1-2 - Knock sensor signal (from EZK) missing 3-2-1 - Cold start injector signal missing or faulty 3-2-2 - Mass Air Flow sensor burn-off signal missing or faulty (MAF wiring fault) 3-4-4 - Exhaust Gas Recirculation temperature signal missing or faulty EZK 1-1-1 - No faults 1-4-2 - EZK internal fault 1-4-3 - Knock sensor signal missing or faulty 1-4-4 - Load signal from ECU missing 2-1-4 - RPM sensor signal intermittently missing 2-2-4 - Coolant temperature sensor signal missing or faulty 2-3-4 - Throttle position sensor idle signal faulty Once you've repaired the problem or to check if the problem is still present after repairs, you'll need to clear the codes from the ECU/EZK. This is accomplished by inserting the probe into the appropriate socket and read the codes as detailed above. Once the codes have read themselves out, press the button for more than 5 seconds. After 3 seconds, the LED should light. Press the button again for more than 5 seconds. the codes should now be erased. You can then repeat the procedure for reading codes and you should read '1-1-1' for 'no faults stored'. I hope this post is useful and keeps everybody on the road! If anybody's got any additions or amendments to what I've written, don't hesitate to contact me or post them up.
__________________
Click to see 240 parts I want to give you money for! Last edited by wooble; Apr 18th, 2011 at 12:02. |
The Following 16 Users Say Thank You to wooble For This Useful Post: |
Apr 18th, 2011, 11:56 | #2 |
Former contributor
Last Online: Jul 2nd, 2022 07:54
Join Date: Dec 2004
Location: Rhosgoch, Anglesey
|
Thanks for that very useful fact sheet.
Mike
__________________
A Volvo is for life not just for Christmas! |
Apr 18th, 2011, 12:25 | #3 |
Ovlovnut
|
Great Thanks for this one Wooble, I'll ask for it to be moved into the articles section .
__________________
2004 V70 2.4SE Auto 'The Welshmobile’ 2002 Laika Ecovip 400i ( Motorhome on an Iveco 2.8TD) http://www.gitessouthbrittany.com/ http://moncopainmonchien.jimdo.com/ |
The Following User Says Thank You to Paul240480 For This Useful Post: |
Apr 18th, 2011, 15:24 | #4 |
Not an expert but ...
Last Online: Yesterday 08:24
Join Date: Dec 2001
Location: Boncath
|
I have had two cars where the standard way of clearing the codes did not work. The sure way is simply to disconnect the battery for a second or two. (But it may lose radio memory settings)
|
Apr 19th, 2011, 18:28 | #5 |
Member
Last Online: Jan 7th, 2024 01:54
Join Date: Feb 2010
Location: bolton
|
Your description is a lot clearer than J.H.Haynes, wooble!
Thanks for taking the time to set it out clearly. |
Apr 22nd, 2011, 19:58 | #6 |
Senior Member
Last Online: Apr 9th, 2024 15:02
Join Date: May 2007
Location: Sheffield
|
Worth printing out and keeping in the car.
|
The Following 2 Users Say Thank You to rtbcomp For This Useful Post: |
Dec 30th, 2012, 14:05 | #7 |
Forum Support Team
Last Online: Yesterday 15:57
Join Date: Mar 2006
Location: Deep in Makem territory
|
Copied to articles
__________________
Current 04 S80 D5 SE Auto 03 S80 D5 SE Man Previous Volvos 90 240 GL B230FB Auto 96 940 CD 13 V40 D2 R-design 89 745 GLE 98 V90 3.0 24v 98 945 Celebration Auto 96 965 SE Auto 86 744 GL 81 244 DL |
The Following 2 Users Say Thank You to cumbrianmale For This Useful Post: |
Dec 30th, 2012, 16:22 | #8 |
☭Nick☭
Last Online: Jun 22nd, 2014 23:30
Join Date: Oct 2012
Location: Lincolnshire
|
My 850 has a similar self diagnostic unit. Are the codes the same for all Volvos that have these units?
(I seem to remember that 2-2-3 was the code for IACV on the 850 immediately before RiPsTa33 (Chris) replaced it.)
__________________
1998 Volvo S70 CD 2.5T 20 valve (B5254T) Community First Responder transport & Daily Driver previously...1994 Volvo 854 SE 2.0 20 valve "L411XCC" & 1999 Volvo S40 2.0T SE "T283LTW" |
Mar 24th, 2014, 01:29 | #9 |
New Member
Last Online: Mar 24th, 2014 08:46
Join Date: Mar 2014
Location: Murphy
|
Volvo 240 Code 322
So I am getting this code. I check the ":Broken wire" they speak of and the connection on the white wire is good. So I have a 90 Volvo 240 and I bought a new MAF on ebay. I need an 02 because the cat is gone, but that is throwing a code 212 which is explainable. but why the code 322 with a new sensor?
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
|
|