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+---- Thread: E60 LM2 retrofit problem with pre lci taillights (/showthread.php?tid=122475)
E60 LM2 retrofit problem with pre lci taillights - szefuncio512 - 02-09-2026
Hi,
I replaced the LM1 with an LM2 in a 2005 E61.
The car originally had adaptive xenon headlights, but I replaced them with standard non-adaptive LCI xenon headlights.
The rear lights are still pre-LCI.
After coding $522 and making a few manual coding changes, the front xenon headlights work perfectly. The rear lights also work, except for the rear position/tail lights.
The rear position lights come on for about 20 seconds, then they switch off and I get an error in iDrive.
I also get iDrive error messages for:
position lights — they work for about 20 seconds, then switch off and an error appears
brake lights — they work normally, but iDrive still reports a fault
rear turn signals — they work, but flash very fast as if a bulb was missing
What I’m trying to achieve is a fully working setup with:
LCI front xenon headlights + pre-LCI rear lights + LM2.
The main issue is getting the rear position/tail lights to stay on instead of being switched off after about 20 seconds.
I didn’t change any pins when installing the LM2. I just plugged the LM2 into the existing LM1 wiring
Has anyone done this combination before, or knows which LM2 coding/PWM/pin configuration settings are needed for pre-LCI rear lights?
errors from tool32
---------------------------------------
Date: 02.09.2026 14:26:00
ECU: LM_AHL_2
JobStatus: OKAY
Variant: LM_AHL_2
---------------------------------------
RESULT: 7 error in error memory !
---------------------------------------
A8B9 - Schlusslicht/Bremslicht rechts defekt
Signal oder Wert oberhalb Schwelle
Testbedingungen erfüllt
Fehler momentan vorhanden und bereits gespeichert
Fehler würde kein Aufleuchten einer Warnlampe verursachen
Error code: A8 B9 61
---------------------------------------
A8B8 - Schlusslicht/Bremslicht links defekt
Signal oder Wert oberhalb Schwelle
Testbedingungen erfüllt
Fehler momentan vorhanden und bereits gespeichert
Fehler würde kein Aufleuchten einer Warnlampe verursachen
Error code: A8 B8 61
---------------------------------------
9CB6 - LWR-Spulenabriss
kein Signal oder Wert
Testbedingungen erfüllt
Fehler momentan vorhanden und bereits gespeichert
Fehler würde kein Aufleuchten einer Warnlampe verursachen
Error code: 9C B6 64
---------------------------------------
A8C5 - Tagfahrlicht rechts defekt;
RR02: Begrenzungslicht rechts defekt
kein Signal oder Wert
Testbedingungen erfüllt
Fehler momentan vorhanden und bereits gespeichert
Fehler würde kein Aufleuchten einer Warnlampe verursachen
Error code: A8 C5 64
---------------------------------------
A8C3
E63/E64 bis 09/07, E65:
Fahrtrichtungsanzeiger rechts vorne 2 defekt
E60/E61 ab 03/07:
Bremslicht rechts innen defekt
RR US:
Fahrtrichtungsanzeiger rechts hinten 2 defekt
kein Signal oder Wert
Testbedingungen erfüllt
Fehler momentan vorhanden und bereits gespeichert
Fehler würde kein Aufleuchten einer Warnlampe verursachen
Error code: A8 C3 64
---------------------------------------
A8C4 - Tagfahrlicht links defekt;
RR02: Begrenzungslicht links defekt
kein Signal oder Wert
Testbedingungen erfüllt
Fehler momentan vorhanden und bereits gespeichert
Fehler würde kein Aufleuchten einer Warnlampe verursachen
Error code: A8 C4 64
---------------------------------------
A8C2
E63/E64 bis 09/07, E65:
Fahrtrichtungsanzeiger links vorne 2 defekt
E60/E61 ab 03/07:
Bremslicht links innen defekt
RR US:
Fahrtrichtungsanzeiger links hinten 2 defekt
kein Signal oder Wert
Testbedingungen erfüllt
Fehler momentan vorhanden und bereits gespeichert
Fehler würde kein Aufleuchten einer Warnlampe verursachen
Error code: A8 C2 64
=======================================
RE: E60 LM2 retrofit problem with pre lci taillights - Emelint - 02-09-2026
Just code out cold/hot check and report from turn signal 2 (it is BFD), turn on toggle sense resistor for rear turn signal and correct pwm for rear turn signal and rear standing lights. It's ёд5у, 5 Mon for 1st time.
Just code out cold/hot check and report from turn signal 2 (it is BFD), turn on toggle sense resistor for rear turn signal and correct pwm for rear turn signal and rear standing lights. It's ёд5у, 5 min for 1st time.
Just code out cold/hot check and report from turn signal 2 (it is BFD), turn on toggle sense resistor for rear turn signal and correct pwm for rear turn signal and rear standing lights. It's ёд5у, 5 min for 1st time.
Just code out cold/hot check and report from turn signal 2 (it is BFD), turn on toggle sense resistor for rear turn signal and correct pwm for rear turn signal and rear standing lights. It's ёд5у, 5 Mon for 1st time.
RE: E60 LM2 retrofit problem with pre lci taillights - szefuncio512 - 02-09-2026
(02-09-2026, 18:54 PM)Emelint Wrote: Just code out cold/hot check and report from turn signal 2 (it is BFD), turn on toggle sense resistor for rear turn signal and correct pwm for rear turn signal and rear standing lights. It's ёд5у, 5 Mon for 1st time.
Just code out cold/hot check and report from turn signal 2 (it is BFD), turn on toggle sense resistor for rear turn signal and correct pwm for rear turn signal and rear standing lights. It's ёд5у, 5 min for 1st time.
Just code out cold/hot check and report from turn signal 2 (it is BFD), turn on toggle sense resistor for rear turn signal and correct pwm for rear turn signal and rear standing lights. It's ёд5у, 5 min for 1st time.
Just code out cold/hot check and report from turn signal 2 (it is BFD), turn on toggle sense resistor for rear turn signal and correct pwm for rear turn signal and rear standing lights. It's ёд5у, 5 Mon for 1st time.
i believe i did that for every light (brake, turn and standing) and still doesnt work
but i will check again
RE: E60 LM2 retrofit problem with pre lci taillights - Emelint - 05-09-2026
You can give me your TRC file, I'll check.
RE: E60 LM2 retrofit problem with pre lci taillights - dumitru.o - 06-09-2026
2005 what month? post the VIN here, it s important. you modified the month/year in the VO?
you should code the module with 03/05 whatever month you have in 2005.
i hope you did added (and re pinned) the wires for the xenon headlights modules as the adaptive ones have less wires......otherwise your headlights won t move up-down