400E (124.034) V8-4.2L (119.975) (1992)
Engine Control Module: All Technical Service Bulletins
A/T - Delayed Upshift Code 29
MB-NET ADMINISTRATIVE MESSAGE
FEBRUARY 6, 1992
MESSAGE # 064
TO:
ALL DEALER SERVICE MANAGERS
CC:
REGIONAL PARTS/SERVICE MANAGERS MBNA FIELD PERSONNEL PDC MANAGERS
SUBJECT:
GROUP 07 - MODEL 400E DELAYED UPSHIFT
IN ADDITION TO THE FAMILIAR UP-SHIFT DELAY 2-3 AND 3-4, MODEL 124.034 (400E) ALSO HAS A DELAYED UP-SHIFT FEATURE
FOR 1-2 SHIFT.
1-2 DELAYED UP-SHIFT WILL BE ACTIVATED WITH A COOLANT TEMPERATURE < 40 DEGREES C AND A VEHICLE SPEED > 8 KM/H
(APPROXIMATELY 4 MPH) FOR 8-13 SECONDS UP TO A MAXIMUM SPEED OF 38 KM/H (APPROXIMATELY 20 MPH).
THE 1-2 UPSHIFT IS CONTROLLED BY THE LH CONTROL UNIT AND RELAYS (K29/1).
A MALFUNCTION IN THE SYSTEM WILL BE INDICATED BY CODE "29" IN THE LH CONTROL UNIT. IF CODE "29" IS FOUND IN THE
LH CONTROL UNIT, CHECK THE FOLLOWING:
WITH THE CONTROL UNIT REMOVED, CHECK mA BETWEEN PIN 64 (-) AND 40 (+) IN THE CONTACT BOX (070). NOMINAL
VALUE:
200 PLUS/MINUS 80 mA
THE NEXT UPDATE OF THE DIAGNOSTIC MANUAL WILL CONTAIN THIS INFORMATION.