TROUBLESHOOTING FLASH CODE 54
[b] If the resistance measurement is less than or equal to 1,000 , the signal wire #556 or
return wire #557, is shorted to ground, or wired to an unauthorized device. Repair the
short; refer to section 54.3.13.
ECM Vehicle Harness Connector
Check Vehicle Speed Sensor Connectors
Perform the following steps to check the VSS connectors.
1. Check terminals at the VSS connectors (both sensor side and harness side) for bent,
corroded, and unseated pins or sockets.
[a] If the terminals and connectors are not damaged, replace the VSS.
Refer to section 54.3.13.
[b] If the terminals and connectors are damaged, repair them. Refer to section 54.3.13.
Check for Short to Power
Perform the following steps to check for short to power.
1. Turn ignition ON.
2. Measure voltage at the ECM vehicle harness connector between socket E3 (#557) and
a good ground. Also measure voltage between socket E2 (#556) and a good ground.
See Figure 54-4.
[a] If both voltage measurements are less than 0.2 volts, refer to section 54.3.10.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION