22.3
TROUBLESHOOTING FLASH CODE 22
[b] If resistance measurement on both readings is greater than 100
or open,
refer to section 22.3.9.
Figure 22-3
Throttle Position Sensor
22.3.9
Check for Signal Open
Perform the following steps to check for signal open:
1. Install a jumper wire between sockets A (return #952) and B (signal #417) of the TPS
harness connector.
2. Measure resistance between sockets D2 and C3 on the vehicle connector.
[a] If the resistance is less than or equal to 5 , refer to section 22.3.10.
[b] If the resistance is greater than 5
or open, the signal line (#417) or return line
(#952) are open, repair the open. Refer to section 22.3.15.
22.3.10 Check ECM Connectors
Perform the following steps to check the ECM connectors:
1. Check terminals at the ECM harness connector (both ECM and harness side) for bent,
corroded, and unseated pins or sockets. See Figure 22-4.
[a] If terminals and connectors are damaged, repair them. Refer to section 22.3.15.
All information subject to change without notice.
22-8
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
