TRANSMISSION GP-POWER SHIFT 1470200 - Caterpillar

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Table 2
Troubleshooting Test Steps Expected Results Results
1. Inspect the Electrical Connectors and the Wiring
A. Remove electrical power from the ECM. Turn the keyswitch to the OFF position.
B. Thoroughly inspect the connectors for sensors (1 through 4). Also, thoroughly inspect connectors (5 through 8) .
C. Perform a 45 N (10 lb) pull test on each of the wires in the ECM connectors that are associated with the circuit.
D. Check the allen head screw for each of the ECM connectors for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect", for details.
E. Check the harness and wiring for abrasion and for pinch points from the sensors back to the ECM.
All connectors, pins, and sockets are completely coupled and/or inserted and the harness and wiring are free of corrosion, of abrasion and of pinch points.
Result: The harness and connectors appear to be OK. Proceed to Test Step 2.
Result: There is a problem with the connectors and/or wiring.
Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled. Verify that the repair eliminates the problem.
STOP
2. Check for Active Diagnostic Codes
A. Connect Cat Electronic Technician (ET) to the service tool connector.
B. Restore electrical power to the ECM.
C. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Look for the following diagnostic codes:
41-3
41-4
100-10
262-3
262-4
1785-10
Note: Wait at least 30 seconds in order for the diagnostic codes to become active.
No diagnostic codes are active.
Result: No diagnostic code is active.
Repair: The problem is no longer present. If the problem is intermittent, refer to Troubleshooting, "Electrical Connectors - Inspect".
STOP
Result: The 100-10 or 1785-10 diagnostic code is logged at this time. The analog supply is not reaching the sensor. Proceed to Test Step 3.
Result: A 262-3 or 262-4 diagnostic code is active at this time. There is a problem with the sensor supply for the analog sensors. Proceed to Test Step 4.
Result: A 41-3 or 41-4 diagnostic code is active at this time. There is a problem with the sensor supply for the digital sensors. Proceed to Test Step 6.
3. Check the Supply Voltage at the Sensor Connector
A. Disconnect the harness connectors of the sensor for the diagnostic code.
B. Restore the electrical power to the ECM.
Note: Be sure to wiggle the harness during the following measurements in order to reveal an intermittent condition.
C. Measure the voltage between terminals A and B at the connector.
D. Measure the voltage between terminals A and B at the connector.
E. Connect all of the sensors.
The voltage measurement is 5.0 0.2 VDC.
Result: The voltage measurement is 5.0 0.2 VDC.
Repair: The analog sensor supply is reaching the sensor connector. There may be a problem with the sensor. Perform the following procedure:
1. Clear all diagnostic codes.
2. Run the engine. Allow the engine to warm up. Use Cat ET to check for diagnostic codes that have become active or logged. If the code becomes active or