Copyright © 1998 General Motors Corp. 6–63
WTEC II ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL
Main code 41 indicates the ECU has detected either an open circuit or a short-to-ground in a solenoid or the
solenoid wiring. The
DO NOT SHIFT
response is activated when this code is detected and all solenoids are
turned off.
NOTE: For subcodes 12, 13, 14, 15, 16, 22 — neutral start is inoperable; all display segments are on if the
code is logged during ECU initialization (ignition on). Subcodes 21, 23, 24, 25, and 26 will not trigger
the DO NOT SHIFT light.
NOTE: If solenoid resistance is about 1–2 Ohms, a short-to-ground code may not be set but could cause a
burned-out solenoid driver in the ECU. Replace the solenoid when this occurs (see appropriate
transmission Service Manual for replacement procedure). If the solenoid driver is burned out, 69 XX
codes will be set. See the troubleshooting procedure for 69 XX codes.
Active Indicator Clearing Procedure:
•
Power down
•
Manual
NOTE: Intermittent connections or lack of battery-direct power and ground connections may cause this and
other codes.
Main
Code
Subcode Meaning
41 12 Open or Short-to-Ground A Solenoid Circuit
41 13 Open or Short-to-Ground B Solenoid Circuit
41 14 Open or Short-to-Ground C Solenoid Circuit
41 15 Open or Short-to-Ground D Solenoid Circuit
41 16 Open or Short-to-Ground E Solenoid Circuit
41 21 Open or Short-to-Ground F Solenoid Circuit
41 22 Open or Short-to-Ground G Solenoid Circuit
41 23 Open or Short-to-Ground H Solenoid Circuit
41 24 Open or Short-to-Ground J Solenoid Circuit
41 25 Open or Short-to-Ground K Solenoid Circuit
41 26 Open or Short-to-Ground N Solenoid Circuit
CAUTION:
All solenoids (except “H”) are pulse width modulated to control current levels. Any DC
battery voltage applied directly to the solenoid must be no greater than 5–6V to prevent
damage to the solenoid coil.
CODE 41 XX — OPEN OR SHORT-TO-GROUND IN SOLENOID CIRCUIT
(Figures 6–21, 6–22)
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