Autodata - Diagnostic Trouble Codes Fault locations and probable causes - 2004 edition

Engine management
Model: 80 1,612,O 1001A6 2,O
Year: 1991 -07192
Engine code: ME, ABM, ABT
System: Bosch Mono-Motronic MA1.2.1
80 - in underbonnet fuseboxlrelay plate
100lA6 - in underbonnet relay plate
NOTE: 35 pin ECM multi-plug.
General information
Refer to the front of this manual for general test conditions,
terminology, detailed descriptions of wiring faults and a
general trouble shooter for electrical and mechanical faults.
Trouble codes are displayed by using an LED connected to
the data link connector (DLC).
n The ECM fault memory can also be checked and erased
using diagnostic equipment connected to the data link
connector (DLC).
Self-diagnosis using flash type trouble codes may not
display all available diagnostic information.
Carry out road test for 10 minutes.
Accessing
Ensure ignition switched OFF.
Bridge black data link connector (DLC) terminal 1 H [A] and
brown or white data link connector (DLC) terminal 1 H [B]
with a switched lead - contacts normally open.
Connect LED test lamp between black data link connector
(DLC) terminal 2 [A] and ECM terminal 33.
80: ECM located behind passenger's glovebox.
100: ECM located in plenum chamber.
NOTE: DO NOT disconnect ECM multi-plug as this will erase fault
memory.
Start engine. Allow to idle.
NOTE: If engine does not start: Crank engine for 6 seconds.
Leave ignition switched ON.
Operate switch for 4 seconds.
Release switch. Check that LED flashes.
Count LED flashes. Note trouble code.
Each trouble code consists of four groups of one to four
flashes.
A 2,5 second pause separates each trouble code group [A].
Repeat switch operation. Note trouble codes. Compare with
trouble code table.
End of test sequence indicated by trouble code 0000
(long flashes).
Switch ignition OFF. Rectify faults as necessary.