Having some intermittent issues with our CAT 299D skid steer, been trying to fix this for a little while so posting the full timeline below. Mainly interested in folks thoughts or how they might start troubleshooting the speed sensor and if its possible to bench test the engine sensor. Sorry for the overload of information but figured more details the better.
299D1 Skid Steer (Serial: GTC00593) Machine History:
Active DTC Codes:
If an older machine is flashed with the new machine software, the advanced display will not state "Eng Speed Limited Warm Up Mode". Instead the display will state "E60032-2”.
The advanced display can be flashed with the new monitor software group and the display will state, "Eng Speed Limited Warm Up Mode". Many features and operations of the display will also change with this new software. A Service Magazine and Special Instructions are in process to cover those changes. This new display software went into production in September 2018.
Note: If the machine is equipped with a basic display the amber alert indicator will flash until the machine has warmed sufficiently.
Inactive DTC Codes (Can’t Clear):
299D1 Skid Steer (Serial: GTC00593) Machine History:
- 10/29/2022 Replaced engine with CAT Reman
- 09/11/2023 Had CAT come out to an island job to troubleshoot and run a forced regen. It was in limp mode prior, and couldn’t preform a regen. After the forced regen we were able to get it off the island, and appeared to be working well for a short while. We have replaced the speed sensor #2 (377-6953) prior to CAT tech coming out and have a few other times, as we were getting the DTC 723-2 (Engine Speed Sensor #2 Data Erratic, Intermittent, or Incorrect).
- 10/02/2023 Had CAT tech come out to work on another machine and said he unable was unable to clear logged DTC's because it (ECM?) was a not manufactured by CAT (like Kubota Engine?) and couldn’t clear previous DTC’s codes with CAT ET tool. Also couldn’t read much more than the what the display showed for DTC’s.
- 10/02/2023 See attached PDF of DTC codes. Was intermittently having issues and DTC’s would come on, not super helpful PDF because none of the codes are active just shows past DTC’s which can’t be cleared.
- 11/29/2023 See attached PDF of DTC codes. More frequently having issues, guys that have been running it say that it infrequently shuts itself off (abruptly stops) and even more infrequently it won’t start. As I understand it this usually happened after 3-5 hours of heavy machine use and then becomes occurs more frequently after the machine is heated up. And occurs until the machine then won’t start at all, then when coming back to it the next day it will start and operate normally.
- 02/20/2024 Tried to replicate problem and could only get it to pop up with two active DTC’s (see attached photos DTC E60032-2 and DTC 723-2). Ran the machine up/down hill for 1.5 hrs to trigger DTC 723-2 (Engine Speed Sensor #2 Data Erratic, Intermittent, or Incorrect). But other than the DTC’s the machine ran well, appeared to successfully run a DPF regen a few minutes after starting the engine.
Active DTC Codes:
- DTC E60032-2 (Engine Speed Limited Due to Cold Engine) This has occurred since the motor was replaced, sounds like it is related to the software version of the advance display.
If an older machine is flashed with the new machine software, the advanced display will not state "Eng Speed Limited Warm Up Mode". Instead the display will state "E60032-2”.
The advanced display can be flashed with the new monitor software group and the display will state, "Eng Speed Limited Warm Up Mode". Many features and operations of the display will also change with this new software. A Service Magazine and Special Instructions are in process to cover those changes. This new display software went into production in September 2018.
Note: If the machine is equipped with a basic display the amber alert indicator will flash until the machine has warmed sufficiently.
- DTC 723-2 (Engine Speed Sensor #2 Data Erratic, Intermittent, or Incorrect). This has occurred even prior to the motor being replaced. We have replaced the speed sensor #2 (377-6953) a few times. Not sure if there is a way to bench test the current sensor to see if it has failed again.
Inactive DTC Codes (Can’t Clear):
- DTC 100-1 (Engine Oil Pressure Sensor Low – Most Severe 3)
- DTC 190-0 (Engine Speed Sensor High – Most Severe 3)
- DTC 636-8 (Engine Position Sensor Abnormal Frequency Pulse Width or Period)
- DTC 723-8 (Engine Speed Sensor #2 Abnormal Frequency Pulse Width or Period)
- DTC 523539-2 (Fuel Pump Pressure Data Erratic, Intermittent or Incorrect)
- DTC 144-5 (Backup Alarm Relay Current Below Normal)
- DTC 3700-3 (Loader Bucket Inclinometer Sensor Voltage Above Normal)