Dr3, Code 15 - Speed Sensor Circuit
- Connect DRB II. Start engine. Disconnect speed sensor connector. Put system into Engine Running Test "71". Connect jumper wire between the Black and White/Orange terminals of speed sensor. Make and break this connection. If display on DRB II changes, replace speed sensor. If display does not change, go to next step.
- Turn engine off and disconnect speed sensor. Disconnect 60-pin connector from SMEC. Connect an ohmmeter between White/Orange wire at cavity No. 48 of 60-pin connector and White/Orange wire at speed sensor harness connector. If ohmmeter reads continuity, go to next step. If ohmmeter is not reading continuity, repair White/Orange wire in cavity No. 48 of 60-pin connector for an open circuit to speed sensor connector.
- With engine off, disconnect speed sensor and 60-pin SMEC connector. Connect an ohmmeter between Black/Light Blue wire at cavity No. 4 of 60-pin connector and Black wire terminal of speed sensor harness connector. If ohmmeter reads continuity, replace SMEC. Before replacing SMEC, ensure cavity No. 48 is not damaged causing a poor connection. If ohmmeter is not reading continuity, repair Black/Light Blue or Black wire of speed sensor harness connector for an open circuit to wiring harness splice.