[CNC1]

Hope it's fixed! A friend had a Super Duty Ford that lit up like a Christmas tree one day after a rain. He took a video of it, but the service manager wouldn't watch it. They "couldn't replicate" the problem so he was sent home. He searched various Ford forums and found this was happening quite a lot on other trucks. The main wiring harness that passed through the firewall didn't have waterproof plugs and shorted out when it was wet. He dried it out and put dielectric grease on it and traded it in on a Chevy.

 

[14v6]

Good for you ATL. They actually diagnosed and fixed based upon their diagnosis. Hope they got it right and your were smart to take it there while it was happening and best of all so far it seems like you have a dealer that cares. Sounds like it would have been a good candidate for a SMA video. I didn't think dealers were capable of this type of fix these days, good news. If no more limp modes when you get back, should be good to go.

 

[BeshmoHandes]

@BeshmoHandes

Can you please post info on C318?

Sure! C318 is an inline connector between the TCM pins 34 (F-CAN High), 47 (F-CAN Low) and the rest of the F-CAN network. C318 is a two pin connector. Pin 1 is CAN High, pin 2 is CAN Low. The wire color changes from the male to the female mating connector.

Oddly, AutoRepairSource is not showing schematics for me today, so I had to switch to Chilton - which means this data is from 2020, but is almost certinaly the same for 2023 models.

The other mentioned connectors all have F-CAN as well.

C310

C311

TCM Connector

Terminal No	Wire Color	Terminal Name
1	BLK	GND1
2	BRN	GND2
3	LT_BLU	VBSOL
5	RED	+B
6	GRN	VBSOL2
7	BLK	F-CAN B_H
8	GRN	SG1
9	YEL	ESL_PWR
10	GRY	VCC1
12	BLU	TATFP
13	GRN	PARKSEN1
15	BLU	PARKSEN2
17	PUR	VCC2
19	BLK	PCL
20	PUR	F-CAN B_L
28	PNK	SDNP
29	TAN	SUPP
30	BRN	TATFM
31	WHT	NM
32	YEL	PARKOUT
34	LT_BLU	F-CAN A_H
35	LT_GRN	SHC
36	BRN	SHB
37	BLU	RVSOUT
38	YEL	SHA
39	LT_BLU	LSE
40	WHT	LSC
43	RED/BLU	NOUT
47	WHT	F-CAN A_L
51	PNK	SHD
52	TAN	PLA
53	PUR	LSD
54	BLU	LSA
55	RED	LSB
56	GRN	IGN_TRX
58	BRN	IG1

This portion of the F-CAN network shows Connectors C310,C311, and C318:

And for good measure, the SBW connector (20P):

 

[BeshmoHandes]

C311, C318 and TCM 58P connectors are in the engine compartment near the transmission:

Inline connector C310 is not very far away from them:

 

[BeshmoHandes]

Glad you got a relatively quick resolution, and accurate root cause with a simple fix!

 

[ATL RL]

C311, C318 and TCM 58P connectors are in the engine compartment near the transmission:

View attachment 471591


Inline connector C310 is not very far away from them:
View attachment 471592

This is totally awesome!

Thank you very much.

 

[BeshmoHandes]

Seems oddly common in 2017 (before your 9 speed) in the threads I've found.

Makes me wonder about the history of this scenario (same dash warnings) on units with failed torque converters - does the failing torque converter mechanically allow enough flex in the transmission to strain the CANbus connections, or is there another explanation?

I don't know if the simultaneous warnings in those cases also had the same fault code.

 

[WilcoJunoHotel]

Looks like you have a really good dealer - Which one did you take it to? Curious because I am in N. Atl and have taken mine to GP Honda with mixed results so looking for alternatives. Thx.

 

[ATL RL]

Looks like you have a really good dealer - Which one did you take it to? Curious because I am in N. Atl and have taken mine to GP Honda with mixed results so looking for alternatives. Thx.

I'm going to give you a very long answer with a lot of context.

When I bought my Ridgeline my primary vehicle was broken and I needed a brand new vehicle pronto!

Because we are in the South I did not want a vehicle with a black interior.

I wanted either a gray or beige interior.

That meant I was limited in the vehicles I could consider.

The bottom line is I bought my vehicle from Gwinnett place Honda but was never in love with them...... They simply had the first available vehicle that had a gray or beige interior.

I actually had to wait for it to be built and shipped because there were no units on the ground that met my requirements.... Or if they did, the dealers wouldn't budge off of their $3,000 to $4,000 accessory packages which I had no interest in.

Once I took possession of my truck I made Honda Mall of Georgia my exclusive location for service.

They are very close to my house and that makes it pretty convenient.

I have dealt with them for warranty issues and also a flat tire repair.

I want to emphasize that every time I've dealt with them that every service advisor has been very professional.

They know that I have prior OEM experience and have a very technical background.

Sometimes the shop foreman has had to become involved in my situations not because I'm special, but because they wanted to make sure things were repaired properly.

I wholeheartedly endorse Honda Mall of Georgia for service.

I get no benefit by mentioning them but I will say that I've had very good experiences with them for the last 23 months.

 

[ATL RL]

All seems well.

Multiple cold starts and hot restarts.

Have driven it gently and driven it hard.

County roads and the interstate.

No glitches.

Looks like the diag and repair was successful.

Going from GA to FL tomorrow in the truck after all.

 

[BoulderBuster]

All seems well.

Multiple cold starts and hot restarts.

Have driven it gently and driven it hard.

County roads and the interstate.

No glitches.

Looks like the diag and repair was successful.

Going from GA to FL tomorrow in the truck after all.

All is well that ends well.

Enjoy your trip!

 

[Ergo Sum]

All seems well.

Multiple cold starts and hot restarts.

Have driven it gently and driven it hard.

County roads and the interstate.

No glitches.

Looks like the diag and repair was successful.

Going from GA to FL tomorrow in the truck after all.

Good to hear, enjoy your trip!

 

[Wisconsin_Mike]

Great to hear that you're back on the road, @ATL RL!

Did you happen to locate the offending connector on your Ridgeline? According to the drawings @BeshmoHandes posted, connector C318 appears to be right behind the starter motor. I'll have to look back there at some point to see if I can find it.

 

[ATL RL]

Great to hear that you're back on the road, @ATL RL!

Did you happen to locate the offending connector on your Ridgeline? According to the drawings @BeshmoHandes posted, connector C318 appears to be right behind the starter motor. I'll have to look back there at some point to see if I can find it.

This has been a busy week and I have not had time to poke around while the engine is cool.

It will be over a week before I can do it.

My goal is to find it and take a picture.