DDEC TROUBLESHOOTING
[b] If the DDR displays OFF when Pressure Mode is selected, the mode selector wire
(circuit #523) or switch is open or shorted to a voltage source. Repair the fault and
retest. If the EFC tests okay, refer to section 10.13.9.
Figure 10-10
Pressure Transducer and Harness Connector
10.13.7 Check Resume / Accel Switch
Perform the following steps to identify the problem:
1. Start engine.
2. Turn ON pump control switch.
3. Verify all interlocks are set (parking brake, transmission neutral, etc.).
4. Plug in DDR. Select Switch/Light status.
5. Observe the displays and Res/Accel, while depressing the increase switch.
[a] If DDR displays OFF to ON when increase is depressed, check the EFC.
Refer to section 10.13.9.
[b] If the DDR displays OFF when increase is depressed, circuit #541 is open or shorted
to a voltage source. Repair the fault and retest.
10.13.8 Check Set / Coast Switch
Perform the following steps to identify the problem:
1. Start engine.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
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