A/T - Delayed Upshift Code 29

9216mercedes01

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.