PLATE AS 2389762 - Caterpillar

Illustration 1 g02793816
Schematic of the Transmission Speed Sensor 2
This diagnostic code is recorded when the ECM reads erratic data from the sensor signal wire.Possible causes of this diagnostic code are listed:
Wire E907-GY(Grey) is shorted to ground.
The TOS sensor is not installed correctly.
The TOS sensor has failed.
The ECM has failed. This is unlikely.Service Notes: If the diagnostic code for the sensor supply is present, correct the diagnostic code prior to troubleshooting the CID 0673 FMI 08. Before the diagnostic code becomes active, the machine must be operated in second gear or higher. Ensure that the CID 0673 FMI 08 is active.System Response:Machine shifting could be inhibited if this diagnostic code is active and the ECM is reading error data from the other TOS sensor or the TCO sensor.Test Step 1. CHECK THE VOLTAGE AT THE SENSOR.
Turn the disconnect switch and the key start switch to the ON position.
Disconnect the machine harness from the sensor.
At the machine harness connector for the sensor, measure the resistance between contact 1 (wire E906-OR(Orange)) and contact 2 (wire E907-GY(Grey)). Expected Result:The voltage should measure approximately 10 VDC.Results:
OK - The voltage is approximately 10 VDC. Proceed to test step 3.
NOT OK - The voltage is NOT approximately 10 VDC. There is an open in the machine harness or the ECM has failed. It is unlikely that the ECM has failed. Proceed to test step 2.Test Step 2. CHECK FOR AN OPEN CIRCUIT.
Turn the key start switch and the disconnect switch to the OFF position.
The sensor remains disconnected from the machine harness.
Disconnect the machine harness connector J1 and J2 from the ECM.
At the machine harness connector for the sensor, install a jumper wire from contact 2 (wire E906-OR(Orange)) to frame ground.
At the machine harness connector J1 for the ECM, measure the