ECM - Interference Pulse from Coil
SECTION2
GROUP
28
NO.
812
DATE
May 1994
Interference pulse from coil 1994 B5252S 850 (10 valve)
CANADA ONLY
REFERENCE: TP 2101201, SECTION 2 (20-22, 25-28) 65204, 65234, 65252, 65284 ENGINES 850 1992-
INTERFERENCE PULSE FROM COIL
Applies to 850 model year 1994 with the B5252S engine with Fenix 5.2 engine management system.
Under certain conditions the ignition coil can generate interference pulse which may affect the ECM (engine control module). In some cases the DTC(s) 112 and/or 113 can be set and the MIL lamp be activated. Connecting a capacitor to the coil as described in this bulletin will help prevent the interference pulse.
DO NOT REPLACE THE ECU.
Important:
Do not install the capacitor in cars with chassis numbers above 854- 154806 and 855 - 058770. Cars which are produced after these chassis numbers, have this function programmed in the control unit.
Capacitor, P/N 9148950-0
METHOD:
Make a note of the radio code Turn radio off Turn ignition off Remove the battery negative terminal.
Remove the HT lead from the coil.
Loosen bolt on upper mounting on the ignition coil bracket (A) approx. 3 mm, (1/8").
On the ignition coil: remove the M6 nut (B) on the 15 supply (red cable).
INSTALL THE CAPACITOR AT BOLT (A) AND TORQUE TO 8 NM (6 FT.LBS).
On ignition coil: install cable terminal on 15 supply (B) and torque to 4.5 Nm (3.3 ft lbs).
Make sure there is no contact between the cable terminal on the signal cable (C) and the 15 supply voltage (B).
Replace the HT lead on the ignition coil.
Reinstall the battery negative terminal.
VERIFY REPAIR.
Read off and reset any DTCs.
Reset the radio code.
Reset clock.
WARRANTY STATEMENT: Claims may be submitted under the New Car Limited Warranty when a manufacturing defect is present using claim type: 01