1998 v70tdi spedometer signal

[weyert]

my instrument panel with the onboard computer has no function of the rpm, spedometer , cc , i put in an other panel without the onboard computer and every thing functions normaly, so i changed the info switch, the ECU an other spedo panel and it still don't works, i have a code DTC 211 D+signal means no speed signal, i think it has an electrical problem but don't know where to look for?
many thanks for an answer

[esl_97_850_T5]

I think you've misread the digits in your DTC #.

DTC CI-211 does not mean "no speed signal", but instead means "no charge signal (D+) from alternator".
DTC CI-221 does mean "no speed signal".

The following is a quote from the "instrument panel.pdf" that's available in the Volvo_850.zip for a 1995 850:

"DTC CI-211
D+ Signal Absent
1) This DTC will set if instrument cluster registers no
charge signal (D+) from generator when engine speed signal exceeds
1000 RPM for at least 10 seconds. Generator charge warning light will
come on with engine running. Warning lights for filament sensor,
braking circuit, parking brake, coolant level, SRS, low fuel level,
service, and washer fluid level will also come on.
2) To correct this problem, check for defective generator,
broken signal leads, high contact resistance, or loose drive belt.

DTC CI-221
Speed Signal Absent
1) This DTC will set if instrument cluster does not register
a speed signal (input signal) when engine speed signal exceeds 1500
RPM for at least one minute and engine temperature exceeds 122 F (50 C)..."

Those DTC descriptions are likely still applicable to your 1998 V70 TDI.

I'm assuming you've already solved this problem by now, but thought the explanation of the difference of DTCs CI-211 and CI-221 should be added here. If you did not eliminate this DTC CI-211 by solving the missing D+ power problem, then let us know.

esl_97_850_T5

[Maxoner22]

Hello, I did not fix my problem. I got the CI 221 DCT code and the speedometer sometimes works and sometimes doesn't. Do you know what should I check? The TRACS and ABS light up in the dash.

Thanks,
Máximo.

[esl_97_850_T5]

I'd guess you most probably have a failing ABS module.