WTEC III ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL S ECTION 5 — OIL LEVEL SENSOR Copyright © 2001 General Motors Corp. 5–1. INTRODUCTION The Oil Level Sensor (Figure 5–1) provides a means of electronically checking the transmission fluid level from the shift selector display, the ATDTTM, Pro-Link® 9000 (DDR) diagnostic tool, or a customer-furnished remote display. DESIGN 1 DESIGN 2 V07087 Figure 5–1. Oil Level Sensor The Design 2 OLS is a one-piece unit with a molded 3-terminal connector built into the sensor housing (see Figure 5–1 and SIL 19-WT-99 for more details).
The internal wiring harnesses have been redesigned to include the 3-terminal connector for the OLS and to lengthen the branch to the OLS. NOTE: The Design 2 OLS is standard on the 3000MH and 4000MH model transmissions. Figure 5–2 shows the position and orientation of the new OLS on the control modules of the 3000MH/MD 3000/ B 300/ B 400 and the 4000MH/HD 4000/B 500. The new OLS must be correctly positioned. The internal harness connector must reach the connector on the sensor. The control module must fit onto the transmission main case without interference. The one piece design reduces the complexity of the manufacturing and installation of the sensor.
The Design 2 OLS uses shoulder bolts and Viton® ferrules to provide vibration dampening in the mounting. The Design 2 OLS became effective at the following S/Ns: MD 3000, B 300, B 400: 6510220479 HD 4000, B 500: 6610048466, Except S/N 6610052000 through 6610052184 (S/Ns 6610052000 through 6610052184 were built on a 2nd assembly line with the Design 1 OLS.) The Design 2 sensor can be used in place of the former sensor by using a short harness adapter between the 4-terminal (2 x 2) connector on the former internal wiring harness and the new 3-terminal (1 x 3) connector of the new OLS.
A kit is available for replacing the Design 1 sensor and it includes the Design 2 sensor, mounting bolts, and the harness adapter so that the old internal harness can be re-used. Transmissions built after the serial number break will have the Design 2 sensor and a new internal wiring harness using the 3-terminal connector. The Design 1 OLS is completely cancelled. The former internal harnesses will be maintained for service. Refer to most recent parts catalogs PC2150EN and PC2456EN for part number information. DESIGN 1 DESIGN 2 V07087 Figure 5–1.
Oil Level Sensor The Design 2 OLS is a one-piece unit with a molded 3-terminal connector built into the sensor housing (see Figure 5–1 and SIL 19-WT-99 for more details). The internal wiring harnesses have been redesigned to include the 3-terminal connector for the OLS and to lengthen the branch to the OLS. NOTE: The Design 2 OLS is standard on the 3000MH and 4000MH model transmissions. Figure 5–2 shows the position and orientation of the new OLS on the control modules of the 3000MH/MD 3000/ B 300/ B 400 and the 4000MH/HD 4000/B 500. The new OLS must be correctly positioned. The internal harness connector must reach the connector on the sensor.
The control module must fit onto the transmission main case without interference. The one piece design reduces the complexity of the manufacturing and installation of the sensor. The Design 2 OLS uses shoulder bolts and Viton® ferrules to provide vibration dampening in the mounting. The Design 2 OLS became effective at the following S/Ns: MD 3000, B 300, B 400: 6510220479 HD 4000, B 500:
6610048466, Except S/N 6610052000 through 6610052184 (S/Ns 6610052000 through 6610052184 were built on a 2nd assembly line with the Design 1 OLS.) The Design 2 sensor can be used in place of the former sensor by using a short harness adapter between the 4-terminal (2 x 2) connector on the former internal wiring harness and the new 3-terminal (1 x 3) connector of the new OLS. A kit is available for replacing the Design 1 sensor and it includes the Design 2 sensor, mounting bolts, and the harness adapter so that the old internal harness can be re-used.
Transmissions built after the serial number break will have the Design 2 sensor and a new internal wiring harness using the 3-terminal connector. The Design 1 OLS is completely cancelled. The former internal harnesses will be maintained for service. Refer to most recent parts catalogs PC2150EN and PC2456EN for part number information.