DDEC TROUBLESHOOTING
21.3.6
Check Throttle Position Sensor Connectors
Perform the following steps to check the TPS connectors.
1. Check terminals at the TPS connector (both sensor and harness side) for bent, corroded
and unseated pins or sockets. See Figure 21-3.
[a] If the terminals or connectors are damaged, repair both and refer to section 21.3.10.
[b] If the terminals or connectors are not damaged, replace the TPS;
refer to section 21.3.10.
Figure 21-3
Throttle Position Sensor
21.3.7
Check for Short
Perform the following steps to check for a short.
1. Turn ignition OFF.
2. Disconnect the vehicle harness connector at the ECM. Unplug the TPS connector.
3. Read resistance between sockets D2 and A3 on the vehicle harness connector. For ECM
vehicle harness connector, see Figure 21-4.
[a] If the resistance is greater than 100
or open, refer to section 21.3.8.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
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