WTEC III ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL DIAGNOSTIC CODES SOL enoid OFF (SOL OFF) Response All solenoids are commanded off (turning solenoids “A” and “B” off electrically causes them to be on hydraulically). R eturn to P revious R ange (RPR) Response When the speed sensor ratio or C3 pressure switch tests associated with a shift are not successful, the ECU commands the same range as commanded before the shift. N eutral N o C lutches (NNC) Response When certain speed sensor ratio or C3 pressure switch tests are not successful, the ECU commands a neutral condition with no clutches applied. 6–4.
SHIFT SELECTOR DISPLAYS RELATED TO ACTIVE CODES “Cateye” — The forward slash segments and the middle horizontal segments (-\-) may be on under the following conditions: RSI link fault is active (code 23 12 or 23 14) When two COP timeouts occur within two seconds of each other (reference code 69 33) Shift selector display line fault is active (23 16) All Segments Displayed — All display segments will be illuminated if a severity 1 diagnostic code is present during initialization, or if an electrical code for solenoids A, B, C, D, E, or G is logged before initialization completes. 6–5. DIAGNOSTIC CODE LIST AND DESCRIPTION Table 6–2.
WT Series Diagnostic Codes CHECK TRANS Light Inhibited Operation Description 13 (pg 6–20) 12 ECU input voltage, low Yes DNS, DNA, SOL OFF (hydraulic default) Main Code Sub- code Description 13 ECU input voltage, medium low No DNA 23 ECU input voltage, high Yes DNS, SOL OFF (hydraulic default) 14 12 Oil level sensor, failed low No None (pg 6–24) 23 Oil level sensor, failed high No None 21 12 Throttle position sensor, failed low No Use throttle default values, DNA (pg 6–28) 23 Throttle position sensor, failed high No Use throttle default values, DNA 22 (pg 6–32) 14 Engine speed sensor reasonableness test No Use default engine speed, DNA 15 Turbine speed sensor reasonableness test Yes DNS, lock in current range, DNA 16 Output speed sensor reasonableness test Yes (1) DNS, lock in current range, DNA Copyright © 2001 General Motors Corp.