Doosan (& Daewoo) GC35S:
Check engine light

GC35S Serial # P500124
This machine has a check engine light on, cannot communicate with laptop, and when we try to do the flash codes it does not show it has any codes. After clearing light (by using pedal trick) as soon as we crank it over the light comes back on, but still wont show a stored code?? Anyone have any ideas? I am starting to lean towards the ECU....???
  • Posted 10 Jun 2016 07:25
  • Discussion started by JAYS
  • Iowa, United States
Showing items 1 - 3 of 3 results.
Measure the resistance value across the two wires on the diagnostic port connector where you hook up the laptop. There should be around 120 ohms, if not there is a bad/broken resistor in the harness. It is soldered into the harness about 6-10" from that connector.
  • Posted 9 Jul 2016 05:06
  • Reply by sirthor1881
  • Georgia, United States
yes got it fixed. Ended up finding broken wire between ecu and connector for laptop, laptop showed oxygen sensor code, replaced and o.k. now.
Pedal trick is koeo (key on engine off) accel pedal to the floor and fully released 3 times in 3 seconds and it will do "flash codes". To clear codes do pedal dance 10 times within 10 seconds, and code should clear.
Thanks.
  • Posted 7 Jul 2016 22:45
  • Reply by JAYS
  • Iowa, United States
Hi,
did you manage to fix this? Also what is the pedal trick?
  • Posted 7 Jul 2016 17:14
  • Reply by luke_m
  • Bedfordshire, United Kingdom

Post your Reply

Forkliftaction.com accepts no responsibility for forum content and requires forum participants to adhere to the rules. Click here for more information.

Having trouble using the Discussion Forums? Contact us for help.

Spotlight on lifting industry London, United Kingdom
Global Industry News
edition #1232 - 29 May 2025
In this week’s Forkliftaction News , we look at the life and legacy of Otmar Kaup, the founder of forklift attachment manufacturer Kaup, a true trailblazer in the materials handling sector... Continue reading
UN Forklift FBRS15KQZ2
HANGZHOU, Zhejiang, China
New - Sale
Hitachi HX64B2
Yokohama, Japan
Used - Sale
Your Focus
Latest job alerts …
Knoxville, United States
Johnston, IA, United States
Flower Mound, United States
LeMars, IA, United States
Fact of the week
A 2019 language study shows that languages, regardless of structure or origin, tend to convey about the same amount of information per second despite wide variations in the speed of speech.