DDEC TROUBLESHOOTING
22.3 TROUBLESHOOTING FLASH CODE 22
The following procedure will troubleshoot Flash Code 22.
22.3.1
Multiple Code Check
Perform the following steps to check for multiple codes.
1. Turn ignition ON.
2. Plug in DDR.
3. Read active codes.
[a] If active code 91/4 and no other active codes are logged, refer to section 22.3.2.
[b] If code 91/4 and any or all of the following codes are logged, 91/3, 187/4, or 100/4,
refer to section 91.2.
[c] If codes other than the above are logged, refer to section 9.1.
22.3.2
Check for Device
Perform the following steps to check for device.
1. If there is a throttle (LSG) wired to use the 417 (LSG) circuit, refer to section 22.3.3.
2. If there is no throttle (LSG) wired to use the 417 (LSG) circuit, contact Detroit Diesel
Technical Service, for possible change to the calibration.
[a] If required, reprogram the ECM after the mainframe is changed and
refer to section 22.3.15.
22.3.3
Sensor Check
Perform the following steps to check the sensor:
1. Turn ignition OFF.
2. Disconnect the TPS connector.
3. Install a jumper wire between sockets B (signal #417) and C (5V supply #916);
see Figure 22-2.
4. Turn ignition ON.
5. Read active codes.
[a] If code 91/4 and any other codes are logged, refer to section 22.3.7.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
22-5
