DDEC TROUBLESHOOTING
37.3 TROUBLESHOOTING FLASH CODE 37
The following procedure will troubleshoot Flash Code 37.
37.3.1
Multiple Code Check
Perform the following steps to check for multiple codes.
1. Turn ignition ON.
2. Plug the diagnostic data reader (DDR) into the diagnostic data link (DDL).
3. Read active codes.
[a] If active code 94/3 was logged, and no other codes were logged, refer to section 37.3.2.
[b] If active code 94/3 and any or all of the following codes were logged, 110/3 or
4, 174/3 or 4, 175/3 or 4, 101/3 or 4, 102/3 or 4, 100/3 or 4, 94/4, 73/3 or 4,
refer to section 90.1.
37.3.2
Sensor Check
Perform the following steps to check the sensor.
1. Turn ignition switch OFF.
2. Disconnect FPS connector. See Figure 37-2.
3. Turn ignition ON.
4. Start and run engine.
5. Select Engine Temperature (COOLANT TEMP & OIL) on DDR.
6. Warm up engine until engine temperature reading is greater than 60
C (140
F).
7. Leave engine running at idle after warm-up. Run for five minutes.
8. Read active codes.
[a] If active code 94/3 and any other codes were logged, refer to section 37.3.5.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
37-5
