TROUBLESHOOTING FLASH CODE 18

SAE J1587 EQUIVALENT CODE FOR FLASH CODE 18

TM-9-2320-302-20 Truck Tractor Yard-Type: 43 500 LB GVW DED 4x2 Army Model M878A1 (Ottawa Model 60) (NSN 2320-01-121-2102) Manual
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DDEC TROUBLESHOOTING 18.3 TROUBLESHOOTING FLASH CODE 18 The following procedure will troubleshoot Flash Code 18. 18.3.1 Check Actuator Perform the following steps to check the actuator. 1. Unplug throttle actuator harness connector. 2. Install a jumper wire between cavity F and C. 3. Turn ignition ON. 4. Plug in DDR. Read the codes. [a] If code p 051/3 and any other codes are logged, refer to section 18.3.2. [b] If code p 051/4 is logged, refer to section 18.3.3. 18.3.2 Check Connectors Perform the following steps to check the connectors. 1. Turn ignition OFF. 2. Remove jumper wire. 3. Check connectors, both ECM and throttle actuator side, for bent, broken, or loose connections. [a] If the connectors are not damaged, replace the actuator and refer to section 18.3.7. [b] If the connectors are damaged, bent or have broken pins, repair or replace them. Refer to section 18.3.7. 18.3.3 Check for Open Perform the following steps to check for open. 1. Turn ignition OFF. 2. Move jumper wire from cavity F and C to cavity F and D. 3. Remove engine harness connector. 4. Measure resistance between Y2 (#452) and R1 (#907). See Figure 18-1. [a] If the measured resistance is greater than 1,000 , wire #907 is open. Repair the open or replace the harness and refer to section 18.3.7. All information subject to change without notice. 6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION 18-5

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