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2021-06-06 Engine Light continuously on Error code 42

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published by dcarver on Mon, 06/07/2021 - 11:30
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2006 Yamaha FJR1300 - KrZy8

2021-06-06 Error Code 42

Last Sat KrZy8 lost all charging, discharged battery to stranded on hiway 1, above Ragged Point,  below Gorda. (hyperlink here, Don).

When FJR battery voltage decreases to about 11.2 vdc, the ABS light will come on.
On this ride the ABS light came on, the engine became 'stuttery' at steady throttle. 
Shortly thereafter, it quit running and the Engine Light came on.

Error Code 42 shows at key on.

Manual says.. Check 07 and 21 acutations. 

07 is 'Vehicle Speed Pulse'.

21 is Gear Position Switch.

Real wheel pulse intitial read 0. Rotated rear wheel by hand and it started to count up
proving rear wheel brake pulse functionality to ECU.

Neutral = 'On'.

In gear = 'Off'.

Per FSM.

Tried to clear error code via #62, no luck.

D60 shows 0.

D61 shows 0 too.

D62 shows the 1 error, the one that won't clear, code 42.

Next Steps

  1. Take off lift, ride it a bit, see if, for some strange reason, it clears
  2. Check ABS fuse
  3. Determ battery, unplug main ECU, replug, connect battery, check
  4. Find ABS ECU connector. I imagine it's deep under the airbox or seat area, disconnect, clean, check
  5. Follow any leads from ForumGurus
  6. Call Ivan's Performance and ask any possibility reflash caused it?
  7. Source used ABS ECU?

 

Submitted by dcarver on Thu, 06/10/2021 - 08:14.
  1. On lift and centerstand, in gear, speedo is working, flashing red ABS light until return to neutral, ABS light extinguishes
  2. On wheels, ABS kicks in, is working, front and rear
  3. Still can't clear error code.. perhaps an oversight on Ivan's ECU reflash? I mean, how many peeps have run battery low enough to turn on ABS light then engine quits running.
  4. So the real issue is, I can't clear the error code. FSM says get to Diagnostic code number 62, then toggle engine stop switch. I have done so many times, it doesn't clear the code.

PofA

  1. Unplug main EPU, replug, check results
  2. Install OEM ECU, check results

Submitted by dcarver on Fri, 06/25/2021 - 09:12.

 

 

Re: Error Code 42 (KrZy8) Gen II

Post by ionbeam » 

Error codes can be held in either volatile memory or static memory. In volatile memory the code will be reset when the key is cycled ON/OFF, by disconnecting the battery or by unplugging the ECU. Static memory can only be reset by an action from the ECU, power cycling will have no affect. Code 42 is a static memory code and requires an action by the ECU.

In the following excerpted tables from the FSM, note the right side column for REINSTATEMENT METHOD for code 42. Have you done this? (roughly 13 mph to 19 mph) The code won't clear until this action has taken place. Since your readings from diag shows everything to be working all you should need to do is follow the Reinstatement Method and the code should be able to reset.

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dcarver
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Re: Error Code 42 (KrZy8) Gen II

Post by dcarver » 

Dr. Ionbeam, you ROCK!

Here I was feeling all smug thinking I'd found a problem with Ivan's flash.. installed OEM ECU, no engine light. Reinstall flashed ECU, engine light. Was leaning toward perhaps a bug in Ivans flash, then read your post.. :)

My test ride was in the dirt at the Hondrosa, probably hit the correct speed range, but not for long. Just rode in first gear, tested ABS. So maybe it didn't have adequate time at speed range to reset.

I wonder if it would reset while running on center stand?

 

Submitted by dcarver on Fri, 06/25/2021 - 09:24.

 

From FjRiders.com

Re: Error Code 42 (KrZy8) Gen II

Post by ionbeam » 

Error codes can be held in either volatile memory or static memory. In volatile memory the code will be reset when the key is cycled ON/OFF, by disconnecting the battery or by unplugging the ECU. Static memory can only be reset by an action from the ECU, power cycling will have no affect. Code 42 is a static memory code and requires an action by the ECU.

In the following excerpted tables from the FSM, note the right side column for REINSTATEMENT METHOD for code 42. Have you done this? (roughly 13 mph to 19 mph) The code won't clear until this action has taken place. Since your readings from diag shows everything to be working all you should need to do is follow the Reinstatement Method and the code should be able to reset.

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wheatonFJR loved this
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dcarver
Contributor
Veteran
Posts: 556
Joined: Wed Jan 23, 2013 12:18 am
FJRModel: Gen2, Superior 2006
x 61
x 725
Contact: 
Contact dcarver

Re: Error Code 42 (KrZy8) Gen II

Post by dcarver » 

Dr. Ionbeam, you ROCK!

Here I was feeling all smug thinking I'd found a problem with Ivan's flash.. installed OEM ECU, no engine light. Reinstall flashed ECU, engine light. Was leaning toward perhaps a bug in Ivans flash, then read your post.. :)

My test ride was in the dirt at the Hondrosa, probably hit the correct speed range, but not for long. Just rode in first gear, tested ABS. So maybe it didn't have adequate time at speed range to reset.

I wonder if it would reset while running on center stand?
wheatonFJR loved this

 

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