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Newbie 2019 S-Mode not working, tried everything

Originally Posted by cv129 I see. Nice discount. Another silly question...even sillier than the last one... Is it just the "S" not lighting up or is it really not working

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Old 04-09-2022, 07:29 PM   #16 (permalink)
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Quote:
Originally Posted by cv129 View Post
I see. Nice discount.

Another silly question...even sillier than the last one...

Is it just the "S" not lighting up or is it really not working at all (no auto rev match)? Sorry I have nothing additional to share.

Best of luck!
Just test drove, not working.

Thanks.
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Old 04-09-2022, 08:31 PM   #17 (permalink)
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Quote:
Originally Posted by KapitalZ View Post
"No it isn't, not functioning."

phunk provides possible cause and solution here: S mode not working at all

"Your posts are describing a top clutch switch that needs adjustment. When your top clutch switch is out of adjustment, the control systems are unable to determine when you have your foot on the clutch or not.

Your current switch adjustment is not allowing the switch to fully close when your foot is off the pedal. This means the control system believes your foot is constantly on the clutch pedal as you are driving...

If you go under your dash and adjust the top clutch switch so that it fully closes when you let go of the pedal, your S-Mode will return to normal and your cruise control will start working again. It is a very simple adjustment. Loosen the lock nut, thread the switch closer to the pedal, then tighten the lock nut, done."
My cruise control is working properly, I noted in my original post. But will take a look, I'm open to any suggestions.

Would you happen to have a pic of the clutch switch for reference?

Thank you!
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Old 04-09-2022, 09:00 PM   #18 (permalink)
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Quote:
Originally Posted by KapitalZ View Post
This link has a series of photos and instructions on how to adjust the switches, and the pdf attached shows a schematic of the upper and lower switches.

https://www.nicoclub.com/archives/ho...ssan-370z.html
Thanks a ton!!
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Old 04-09-2022, 09:20 PM   #19 (permalink)
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Quote:
Originally Posted by KapitalZ View Post
Can't find a picture of it, but there's a great series of photos and illustrations in the links below (and one attached) of an upgraded switch you can buy that's very popular on this forum with LHD cars. I'd get one, but I'm in Australia and the upgrade isn't compatible with RHD cars.

350Z version
https://rjmperformance.com/350z-g35/

370Z version
https://rjmperformance.com/370z-g37/
Cool Z by the way! Love the yellow!
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Old 04-09-2022, 09:52 PM   #20 (permalink)
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Quote:
Originally Posted by KapitalZ View Post
Thanks buddy! I love the yellow too. Have you posted a picture of yours?
Just my Avatar. Have to take some cool ones.
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Old 04-10-2022, 10:29 AM   #21 (permalink)
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Everything goes through the ECM. The combination meter also sends a signal via CAN bus to the ECM as well as the shift position indicator via CAN bus.

Since you had dash issues, look for a disconnected wire or connector.

Did they install an aftermarket ALARM system? (if I had a nickel for every F**ck up found after an alarm install.)

I cannot get a print out of the service manual. section EC-125.

Other sensors that send information for REv match to work:

-Crankshaft and CamShaft position sensors
Cluth pedal POSITION and Clutch Interlock switch
-Gear lever position sensor
-Input speed sensor
-Combination meter (via CAN bus)

Look under hood as well as under dash.

ZZ
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Old 04-10-2022, 10:40 AM   #22 (permalink)
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here you go:
Attached Images
File Type: jpg EC.jpg (553.2 KB, 12 views)
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Old 04-10-2022, 10:47 AM   #23 (permalink)
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2.CHECK S-MODE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect S-MODE switch harness connector.
3. Turn ignition switch ON.
4. Check the voltage between S-MODE switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
S-MODE switch
Ground Voltage
Connector Terminal
M255 2 Ground Battery voltage
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Old 04-10-2022, 10:47 AM   #24 (permalink)
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NO >> GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors M98, M252
• Fuse block (J/B) connector M1
• 10 A fuse (No. 3)
• Harness for open or short between S-MODE switch and fuse
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Old 04-10-2022, 10:48 AM   #25 (permalink)
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4.CHECK S-MODE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect combination meter harness connector.
3. Check the continuity between S-MODE switch harness connector and combination meter harness con-
nector.
S-MODE switch Combination meter
Continuity
Connector Terminal Connector Terminal
M255 1 M53 12 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors M98, M252
• Harness for open or short between S-MODE switch and combination meter
>> Repair open circuit, short to ground or short to power in harness or connectors.
6.
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Old 04-10-2022, 10:49 AM   #26 (permalink)
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6.CHECK S-MODE SWITCH
Refer to EC-532, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace S-MODE switch.
7.CHECK INTERMITTENT INCIDENT
Refer to GI-45, "
Intermittent Incident".
>> INSPECTION END
Component Inspection
1.CHECK S-MODE SWITCH
1. Turn ignition switch OFF.
2. Disconnect S-MODE switch harness connector3. Check the continuity between S-MODE swi
Terminals Condition Contin
1 and 2 S-MODE switch
Pressed Existe
Is the inspection result normal?
YES >> INSPECTION END
Released Not Ex
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Old 04-10-2022, 11:43 AM   #27 (permalink)
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Quote:
Originally Posted by ZoomZ View Post
Everything goes through the ECM. The combination meter also sends a signal via CAN bus to the ECM as well as the shift position indicator via CAN bus.

Since you had dash issues, look for a disconnected wire or connector.

Did they install an aftermarket ALARM system? (if I had a nickel for every F**ck up found after an alarm install.)

I cannot get a print out of the service manual. section EC-125.

Other sensors that send information for REv match to work:

-Crankshaft and CamShaft position sensors
Cluth pedal POSITION and Clutch Interlock switch
-Gear lever position sensor
-Input speed sensor
-Combination meter (via CAN bus)

Look under hood as well as under dash.

ZZ
Just did:

1. Another ECU reset
2. Checked Upper Clutch Switch, position seems fine, it pushes the switch pin in (assuming this what it's supposed to do, when clutch pedal is not engaged)
3. Checked fuses, though I'm not sure which specific one to check
4. Checked S-Mode switch connection, wiggled a few items
5. The car looks new all over, all stock, only 2400 miles, only evidence of any fiddling around, is the cluster was removed for diagnosis.
6. There is no aftermarket alarm, but there is a device connected supposedly to fight rust corrosion (see pic).

Thank you for all of this info! I'll be back on it mid-week, working long shifts next three days.
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File Type: jpg IMG_7724.jpg (610.8 KB, 26 views)
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Old 04-10-2022, 12:05 PM   #28 (permalink)
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You may have answered your problem and my suspicion with this statement:

"only evidence of any fiddling around, is the cluster was removed for diagnosis."
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Old 04-10-2022, 12:31 PM   #29 (permalink)
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Quote:
Originally Posted by ZoomZ View Post
You may have answered your problem and my suspicion with this statement:

"only evidence of any fiddling around, is the cluster was removed for diagnosis."
But the cluster worked properly once I replaced the Shipping Fuse. And there weren't any major issues before replacing the fuse, just some minor issues. The Chevy dealer had no idea how to diagnose the minor issues I was having, and of course they scratched some plastics in removal.

I'm definitely not paying someone to fix this issue, if I can't figure it out, I'll just have to live without S-Mode. At this point I haven't experienced it, so not missing anything, lol.

Thanks.
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Old 04-11-2022, 09:36 AM   #30 (permalink)
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The fuse likely reset the combination meter due to someone disconnecting connectors. Doesn't mean it, or other connectors are connected properly or at all.

Start with the real simple test and see if you get power to the switch at the S mode harness. That power comes form combination meter.

Test switch itself.

(i've included both those tests and location of Fuses)

You did say you looked for fault codes?
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