DTC 2, or 1 and 2

Fig. 22 Code 2 Or Codes 1 & 2: Encoder Fault:

DIAGNOSTIC TROUBLE CODE (DTC) 2 OR 1 AND 2

During electronic shifting, the encoder switch circuit is monitored for the proper operating sequence. If at any time during a shift, the encoder changes from one position to any position other than the next possible position, and error counter in the TCCM is incremented by four. After the counter reaches 32, a permanent "Encoder Fault", DTC 2 is flagged and the TCCM reverts to a 2HI to 4LO or a 4LO to 2HI shift pattern only. To guard against transient, random encoder fault due to vibration, dirt, electrical noise, etc., the fault counter is reduced by one each time a good encoder value is detected. The encoder, therefore, must intermittently fail 25 percent of the time to be considered permanently bad and store the DTC 2.