WTEC III ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL GENERAL DESCRIPTION internal harness part numbers for each of the control module configurations. Also reference Table 1–5 for transmission/ECU compatibility information. Table 1–4. Internal Harness P/N by TransID C. Compatibility Between TransID Level And ECU Calibration Level Table 1–5 shows the compatibility of the different ECU software levels with the different TransID level transmissions. Table 1–5. ECU/TransID Compatibility The manufacture and sale of both WTEC II and WTEC III ECUs during most of 1997 required a means of using a common transmission with either a WTEC II or a WTEC III ECU.
A TID 1 transmission is the common transmission configuration for both control systems and production began in September, 1996 (see Table 1–3). A TransID level 1 transmission is compatible with any Allison-supplied ECU. Pre-TransID transmissions are only compatible with V6E, V7, and V7A ECUs. Pre-TransID transmissions were produced before the first S/N break in Table 1–3. TransID level 2 transmissions were produced beginning in late December, 1997 (see Table 1–5). A TransID 2 transmission is compatible with only V8A and later ECUs. Copyright © 2001 General Motors Corp.
1–15 Transmission WT Internal Harnesses TransID 1 TransID 2 ** TransID 3*** MD w/o OLS 29529473 29533653 29536463 MD w/ OLS (old)* 29529472 29533652* N/A MD w/OLS (new)* 29536592 29536602* 29536462 MD 3070PT 29529474 29533654 29536464 HD w/o OLS 29529476 29533656 29536466 HD w/OLS (old)* 29529475 29533655* N/A HD w/OLS (new)* 29536595 29536605* 29536465 HD 4070 N/A 29533657 29536467 * Reference SIL 19-WT-99 ** Reference SIL 7-WT-98 *** Reference SIL 4-WT-00 N/A Not Applicable CIN Compatibility Number Software Level Compatible with TransID Level ECU Production Dates WTEC II 07 V6E pre-TransID and TID 1 until 9/94 08 V7 and V7A pre-TransID and TID 1 9/94 until 12/97 WTEC III 0A V8 TID 1 2/97 until 9/97 0B V8A TID 1 and 2 beginning 10/97 0C V9 TID 1, 2, and 3 beginning 4/00 0D V9A TID 1, 2, and 3 beginning 4/01