2576300 BRAKE GP-SERVICE & PARKING Caterpillar parts
784C, 785C
Rating:
Alternative (cross code) number:
CA2576300
257-6300
2576300
CA2576300
257-6300
2576300
Weight: 2118 pounds 960 kg.
TRACTOR, TRUCK,
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Information:
Operation Description:The GPS receivers are not receiving power. Check the following items:
Display not turned on.
The Fuse or the Circuit Breaker for the system is open.
Damaged harness or connector
Failed GPS Receiver
Power Jumper
Power ModuleTest Step 1. VERIFY THAT THE DISPLAY WILL TURN ON.
Ensure that the battery disconnect switch and the key start switch are in the ON position.
Turn on the display.Expected Result:The display turns on.Results:
OK - The display turns on. Proceed to Test Step 2.
NOT OK - The display does not turn on.Repair: Refer to Troubleshooting, KENR8978, "Electrical Power Supply (Display)".STOPTest Step 2. VERIFY THAT THE GPS RECEIVERS POWER UP.
Verify that the power LED on the GPS receiver(s) is illuminated.Expected Result:All three of the light bars are illuminated.Results:
OK - The power LED on the GPS receiver(s) is illuminated.STOP
NOT OK - The power LED on the GPS receiver(s) is not illuminated. Proceed to Test Step 3.Test Step 3. CHECK THE POWER TO THE GPS RECEIVERS.
Disconnect the harness connectors from the GPS receiver.
Measure the voltage between pin "A" and pin "F" on the harness connector for the receiver.Expected Result:The measured voltage is approximately machine voltage at each machine harness connector for each GPS receiver.Results:
OK - The measured voltage is approximately machine voltage at each machine harness connector for each GPS receiver. The GPS receiver has failed.Repair: Replace the failed GPS receiver.STOP
NOT OK - The voltage is not approximately machine voltage at each machine harness connector for each GPS receiver. Proceed to Test Step 4.Test Step 4. CHECK FUSE OR CIRCUIT BREAKER.
Check the fuse or the circuit breaker.Note: Use the Electrical System Schematic in order to identify the correct fuse or the correct circuit breaker.Expected Result:The fuse or the circuit breaker is OK.Results:
OK - The fuse or the circuit breaker is OK. Proceed to Test Step 5.
NOT OK - The fuse or the circuit breaker has failed.Repair: Replace the fuse or the circuit breaker.STOPTest Step 5. CHECK FOR AN OPEN POWER JUMPER IN THE POWER CIRCUIT IN THE HARNESS.
Use the Electrical System Schematic for the AccuGrade system in order to determine if a power jumper is used.
Place a jumper between pin "B" and pin "C" at the connector of the harness for the display.
Turn on the display.Expected Result:The GPS receiver(s) powers up.Results:
OK - The power jumper has failed.Repair: Replace the power jumper.STOP
NOT OK - The GPS receiver(s) does not power up. The power jumper is not the cause of the failure. Proceed to Test Step 6.Test Step 6. CHECK FOR A SHORTED POWER CIRCUIT IN THE HARNESS.
Check the harness for
Display not turned on.
The Fuse or the Circuit Breaker for the system is open.
Damaged harness or connector
Failed GPS Receiver
Power Jumper
Power ModuleTest Step 1. VERIFY THAT THE DISPLAY WILL TURN ON.
Ensure that the battery disconnect switch and the key start switch are in the ON position.
Turn on the display.Expected Result:The display turns on.Results:
OK - The display turns on. Proceed to Test Step 2.
NOT OK - The display does not turn on.Repair: Refer to Troubleshooting, KENR8978, "Electrical Power Supply (Display)".STOPTest Step 2. VERIFY THAT THE GPS RECEIVERS POWER UP.
Verify that the power LED on the GPS receiver(s) is illuminated.Expected Result:All three of the light bars are illuminated.Results:
OK - The power LED on the GPS receiver(s) is illuminated.STOP
NOT OK - The power LED on the GPS receiver(s) is not illuminated. Proceed to Test Step 3.Test Step 3. CHECK THE POWER TO THE GPS RECEIVERS.
Disconnect the harness connectors from the GPS receiver.
Measure the voltage between pin "A" and pin "F" on the harness connector for the receiver.Expected Result:The measured voltage is approximately machine voltage at each machine harness connector for each GPS receiver.Results:
OK - The measured voltage is approximately machine voltage at each machine harness connector for each GPS receiver. The GPS receiver has failed.Repair: Replace the failed GPS receiver.STOP
NOT OK - The voltage is not approximately machine voltage at each machine harness connector for each GPS receiver. Proceed to Test Step 4.Test Step 4. CHECK FUSE OR CIRCUIT BREAKER.
Check the fuse or the circuit breaker.Note: Use the Electrical System Schematic in order to identify the correct fuse or the correct circuit breaker.Expected Result:The fuse or the circuit breaker is OK.Results:
OK - The fuse or the circuit breaker is OK. Proceed to Test Step 5.
NOT OK - The fuse or the circuit breaker has failed.Repair: Replace the fuse or the circuit breaker.STOPTest Step 5. CHECK FOR AN OPEN POWER JUMPER IN THE POWER CIRCUIT IN THE HARNESS.
Use the Electrical System Schematic for the AccuGrade system in order to determine if a power jumper is used.
Place a jumper between pin "B" and pin "C" at the connector of the harness for the display.
Turn on the display.Expected Result:The GPS receiver(s) powers up.Results:
OK - The power jumper has failed.Repair: Replace the power jumper.STOP
NOT OK - The GPS receiver(s) does not power up. The power jumper is not the cause of the failure. Proceed to Test Step 6.Test Step 6. CHECK FOR A SHORTED POWER CIRCUIT IN THE HARNESS.
Check the harness for
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Caterpillar parts catalog:
Parts brake Caterpillar catalog:
5T3280
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