ENGINE BRAKE INOPERATIVE
1. Verify proper conditions are being met to enable engine brake:
[a] TPS % = 0 %
[b] Pulse width = 0 (or less)
[c] Engine speed >850 r/min
[d] Clutch release (input) = ON (if configured)
[e] Engine brake disable (input) = OFF (Auto Trans)
2. Are the conditions listed in 1a through 1e met?
[a] If conditions are not met, correct the problem (i.e. TPS). Refer to section 10.10.9.
[b] If the conditions are met, reprogram the ECM. Contact the OEM for possible TPS
repair. Then, refer to section 10.10.9.
10.10.9 Verify Repairs
Perform the following steps to verify repairs:
1. Reinstall all connectors.
2. Test drive vehicle to see if the problem is corrected.
[a] If engine brakes operate correctly, troubleshooting is complete.
[b] If engine brakes do not operate, all system diagnostic checks are complete. Review
this section to find the error. Refer to section 10.10.1, or contact Detroit Diesel
Technical Service for possible ECM replacement.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION