If there are complaints for these vehicles that the engine is running poorly and exhaust emissions are increased, a possible cause is a bad earth connection of the ECU.
For error analysis, check the earth connection for the engine control unit.
(Control unit housing/earth connection pin 41)
In addition, loosen the earth connection from the earth point and clean; if necessary, replace the earth wire.
Should the malfunction persist, the defect appears to be in the circuit of the engine control unit.
In this case, the engine control unit must be checked, and replaced if necessary.
Important safety note
Technical information and practical tips have been compiled by HELLA in order to provide professional support to vehicle workshops in their day-to-day work. The information provided on this website is intended for use by suitably qualified personnel only.
Reprinting, distribution, reproduction, exploitation in any form or disclosure of the contents of this document, even in part, is prohibited without our express, written approval and indication of the source. The schematic illustrations, pictures and descriptions serve only for the purposes of explanation and representation of the instructions and cannot be used as a basis for installation or assembly work. All rights reserved.
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