Diesel Engine Troubleshooting

Caterpillar EMS Throttle Position Sensor

without comments

The TPS is located under the accelerator pedal and generates a pulse-width signal that can read with a Fluke Model 97 or equivalent multimeter and a breakout box. The breakout consists of three 12-in. long No.10 AWG wires that bridge the harness connectors and three 6-in. long No. 12 AWG wires that make up to the meter.

1. Using Caterpillar PN 1U5804, crimp Deutch DT 04-3P-E008 male connectors to one end of each of the three long wires and DT 04-3P-E003 female connectors to the other ends. See Fig. 6-22.
2. Make up DT 04-3P-E003 female connectors to one end of each of three short wires. These connectors plug into the meter receptacle.
3. Solder the three short wires to the centers of the longer wires.

Set the meter to measure pulse-width percentage and, with the ignition switch β€œon,” depress the accelerator pedal. Pulse width varies with make and model, but should be in the neighborhood of 80–90% at wide-open throttle and drop to 10 or 20% with the pedal at rest. A spare TPS is good insurance.

breakout box Caterpillar EMS Throttle Position Sensor

Written by Ed

February 14th, 2011 at 7:38 am

Leave a Reply

You might also likeclose