DDEC TROUBLESHOOTING
2. Measure resistance between that cavity and the cylinder block.
3. Also, measure resistance between that cavity and the appropriate return cavity (G or E).
[a] If measured resistance is less than 5 , the wire is shorted. Repair or replace the
harness and refer to section 71.3.5.
[b] If measured resistance is greater than 5 , refer to section 71.3.3.
71.3.3
Check for Open
Perform the following steps to check for an open.
1. Insert a jumper wire between the cavity associated with the code and the return for that
connector (G or E).
2. Remove the valve cover to gain access to the cylinder associated with the code.
3. Remove the connector terminals at the injector solenoid.
4. Measure resistance between the terminal plugs.
[a] If the measured resistance is greater than 5 , the injector wire is open. Repair or
replace the harness and refer to section 71.3.5.
[b] If the measured resistance is less than 5 , and the ECM software is less than 3.00,
reprogram the ECM. Refer to section 71.3.5.
[c] If the measured resistance is less than 5 , and the ECM software is 3.00 or higher,
remove the alternator belt to disable the actuator and refer to section 71.3.4.
71.3.4
Assemble
Perform the following steps to assemble the components.
1. Connect the connectors.
2. Install the valve cover.
3. Start and run the engine.
4. Stop engine.
5. Does the code return?
[a] If the code does not return, repair or replace the alternator grounds and
refer to section 71.3.5.
[b] If the codes return, replace the injector and solenoid. Refer to section 71.3.5.
71.3.5
Verify Repairs
Perform the following steps to verify repairs:
1. Start and run the engine.
2. Stop engine.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
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