Copyright © 1998 General Motors Corp. 6–85
WTEC II ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL
Main code 45 indicates the ECU has detected either an open circuit condition in a solenoid coil or the wiring to that
solenoid. 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. For subcodes 21, 23, 24, 25, and 26
the DO NOT SHIFT light is not illuminated.
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.
NOTE: The retarder accumulator solenoid (“H”) has a 30 Ohm coil. Since “H” solenoid is not mounted in
the sump, no relationship between temperature and resistance is required.
NOTE: Before troubleshooting, read Pages 6–17 and 6–18 of Section 6–5. Also, check battery and ECU input
voltages.
Main
Code
Subcode Meaning
45 12 Open Circuit A Solenoid Circuit
45 13 Open Circuit B Solenoid Circuit
45 14 Open Circuit C Solenoid Circuit
45 15 Open Circuit D Solenoid Circuit
45 16 Open Circuit E Solenoid Circuit
45 21 Open Circuit F Solenoid Circuit
45 22 Open Circuit G Solenoid Circuit
45 23 Open Circuit H Solenoid Circuit
45 24 Open Circuit J Solenoid Circuit
45 25 Open Circuit K Solenoid Circuit
45 26 Open Circuit N Solenoid Circuit
CODE 45 XX — OPEN CONDITION IN SOLENOID CIRCUIT
(Figures 6–32, 6–33)
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