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ETM Issues Discuss issues regarding the problems with ETMs fitted to Volvo cars.

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ETM Problems - 1999 Volvo V70 T5 Manual - UK

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Old Apr 8th, 2022, 22:08   #1
Jamesdc
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Last Online: Mar 22nd, 2024 13:55
Join Date: Feb 2021
Location: Solihull
Default ETM Problems - 1999 Volvo V70 T5 Manual - UK

Hi All,

I have been battling my problematic ETM (I think) for a while now, and I could really do with some advice. Below I have tried to list out as much as I can about the problems I am facing and what steps I have taken to resolve them. I have a couple more tests to do (listed below) when I get back to my parents where the car is being stored. Can anyone help me make an informed decision on what to do next?

Symptoms:

Pre-rebuild (ECU Testing)
- Intermittent ETS lamp and slight stumble just before illumination
- ECM-91A7
- NO limp home mode
- ECM-261A Long Term Fuel Trim, Bank 1 - Upper Limit (very intermittent - more common on LPG)

Post-rebuild (ECU Testing)
- Hunting for idle after codes cleared - settles sometimes (as it learns?)
- Surging while driving all the time
- Intermittent ETS light
- ECM-91B7
- NO limp home mode
- ECM-261A Long Term Fuel Trim, Bank 1 - Upper Limit (very intermittent)

ETM Details:

White Label Magneti Marelli

Part Numbers (From Label)
  • 1103DJR79
  • 99W310101
  • 9186793
  • 65CFM2
  • AH.0002030.J

Part Numbers (Software)
  • 09458345 A (ETM - ECU Diagnostic Software Number)
  • 0009497924 B (ETM - Software Part Number)
  • 229,000 Miles
  • No sweep test available (older software)

Diagnostic Steps Taken:
  • Checked for MAF codes - None
  • Checked for misfire codes - None
  • Sent ETM to ECU Testing for rebuild
    - Inbound Test - No Faults
    - Rebuilt anyway (Sacer unit - not sure what else)
    - Outbound Test - No Faults
  • Full Battery Test (Halfords) - Battery OK
  • Voltage Testing
    - Pin 6 to positive battery terminal - same as battery
    - Pin 5 to negative battery terminal - no resistance (good ground?)
  • Cleaned Ground Connection and Refitted
  • Removed and Cleaned ETM and Lubricated Shaft
  • Cleaned ETM Connectors with Electrical Contact Cleaner
  • Replaced Throttle Pedal with Used (EBay)
  • Removed Fuse 2 (ETM Fuse) with ignition on, engine off and re-installed - Clicks once, whines, clicks again. All within 10 seconds.
  • Held throttle in FIXED POSITION against a block and created the attached graph.

Note - see throttle desired position fluctuating despite pedal being in one position
Note - both throttle position potentiometers seem relatively close to each other to me?


Diagnostic Steps Remaining:

Replace Engine Management Relay
Run wire between fuse and ETM plug
Check voltage across pins 5+6
Check voltage from fuse #2 to negative battery terminal

Options Remaining:
  1. Return rebuilt unit for refund - still broken
  2. Return rebuilt unit for refund and Pay Volvo dealer for diagnostics + new ETM + fitting + software (~£500 GBP)
  3. Pay Volvo to install upgraded software on rebuilt unit
  4. Return rebuilt unit for refund, pay for XeMODeX pre-programmed replacement ($829 USD or £635.91 GBP)
  5. Wait for my Volvo friend to break his early 1999 V70 T5 Automatic (mine is a manual) for me to test his used ETM and Throttle Pedal - no idea when that’ll be.
Attached Images
File Type: jpg Picture1.jpg (62.6 KB, 6 views)
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1999 V70 T5 Manual - Nautic Blue

Last edited by Jamesdc; Apr 8th, 2022 at 22:31.
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