Working Speed Control Inoperative After Programming Of Common Rail Diesel Injection System (CDI) Control Unit (LI54.21-N-066783)

Publication date: 2017-07-24
Reference number: LI54.21-N-066783

WORKING SPEED CONTROL INOPERATIVE AFTER PROGRAMMING OF COMMON RAIL DIESEL INJECTION SYSTEM (CDI) CONTROL UNIT

TECHNICAL SERVICE BULLETIN

Reference Number(s): LI54.21-N-066783 Version 1, Date of Issue: July 24, 2017

SPRINTER:	Model 906 with code XZ1 (Model generation 1) and code M53 (Constant rpm control); Model 906 with code XZ1 (Model generation 1) and code MT4 (Electronic variable rpm governor)
DESIGN GROUP:	54.21 Control units/basic modules

COMPLAINT

After programming of the CDI control unit, the working speed (ADR) is no longer attained.

CAUSE

The initialization of the neutral position sensor (S164) in the transmission is erased when the CDI control unit is programmed.

REMEDY

Teach the neutral position sensor (S164) in the transmission in again using the vehicle diagnosis system and then perform a test drive with several gear changes.

NOTE: The appropriate menu item is in the CDI control unit under "Control unit adaptations -> Teach-in processes".