Cat Command for Dozing, Operator Station Remote Control Indicator Is Not ON Caterpillar

Remote Control Indicator Is Not ON

Cat® Command for Dozing, Operator Station [UENR2686]

Cat Command for Dozing, Operator Station Remote Control Is Not Allowed by Manual Override

Cat Command for Dozing, Operator Station Electrical Power Supply - Test

ELECTRICAL AND STARTING SYSTEM

CONTROL GP-REMOTE

for Dozing, Semi-Autonomous Tractor System (SATS) and Operator Station General Information

for Dozing, Semi-Autonomous Tractor System (SATS) and Operator Station Operator Station

Cat Command for Dozing, Operator Station Electrical Input Components

Cat Command for Dozing, Operator Station Electronic Control Module

Cat Command for Dozing, Operator Station Electrical Output Components

for Dozing, Semi-Autonomous Tractor System (SATS) and Operator Station Engine Does Not Start in Remote Control Mode

Cat Command for Dozing, Operator Station Engine Functions Do Not Respond to Operator Station

System Operation Description:

Remote Control Indicators on the ROPS are not ON when the Manual/Remote Mode Switch is in the REMOTE position.

System Response:

The Remote Control Indicators (Blue Lights), located on the ROPS, should turn on solid when the Manual/Remote Mode switch on the Ground Level Service Center is placed in the REMOTE position. The Blue lights indicate that the Remote Control System has been powered on.

Probable Causes

The Manual Override Switch is in the Manual position.
The Manual Override Switch has failed.
There is a blown fuse.
The Manual/Remote Mode switch is in the Manual position.
The Manual/Remote Mode switch has failed.
The RC Indicator Relay has failed.
Associated harness/connectors have failed.
The Remote Control Indicators (Blue Lights) have failed.

Show/hide table

Table 1
Switch in Manual Position
Contact	Contact	Resistance
4	5	Open
5	6	Less than 5 Ohms

Show/hide table

Table 2
Switch in Remote Position
Contact	Contact	Resistance
4	5	Less than 5 Ohms
5	6	Open

Show/hide table




Illustration 1	g02835937

Show/hide table




Illustration 2	g02835938
Switch truth table

Show/hide table

Table 3
Green Remote Control Indicator Is Not ON
Troubleshooting Test Steps	Values	Results
Test Step 1. Check the Manual Override Switch Position. A. Ensure that the Manual Override Switch is in the REMOTE or OFF position.	The Manual Override switch is in the REMOTE or OFF position.	OK – The Manual Override switch is in the REMOTE position. Proceed to Test Step 2. Not OK – The Manual Override Switch is in the MANUAL position. Repair: Place the Manual Override switch in the REMOTE position. Then turn the Manual/ Remote Switch on the Ground Level Service Center to the MANUAL position then back to the REMOTE position. The Blue lights on the ROPS should now be on solid. STOP.
Test Step 2. Check the Operation of the Manual Override Switch. A. Turn the Machine Disconnect Switch to the OFF position. B. Locate the connector for the Manual Override Switch under the right-hand console in the cab of the machine. C. Disconnect the remote control harness from the connector of the Manual Override Switch. D. Check the resistance between the contacts at the connector of the Manual Override Switch. Refer to Tables 1 and 2.	The resistance measurements are in accordance with Tables 1 and 2.	OK – The resistance measurements are in accordance with Tables 1 and 2. Proceed to Test Step 3. Not OK – The Manual Override switch has failed. Repair: Replace the Manual Override switch. Note: Once the switch has been replaced, you will need to turn the Manual/Remote Mode Switch on the Ground Level Service Center to the Manual position. Then turn the switch back to the REMOTE position in order to reactivate the Remote Control system. STOP.
Test Step 3. Check the Fuses. A. Reconnect the Manual Override Switch. B. Turn the Machine Disconnect Switch to the OFF position. C. Locate the Fuse Panel in the Cab of the machine. D. Check the condition of the Navigator fuse and the Unswitched Auxiliary fuses. Refer to Illustration 1.	The fuses are good.	OK – The fuses are good. Proceed to Test Step 4. Not OK – One or both of the fuses are blown. Repair: Investigate the power circuits for the blown fuse to ensure that there is not a short circuit or too many third-party electronics powered by the circuits being utilized. Then replace the blown fuse or fuses. STOP.
Test Step 4. Check for 24 VDC at the Manual/Remote Mode Switch. A. Turn the Machine Disconnect Switch to the ON position. B. Remove the cover from the Ground Level Service Center to gain access to the Manual/Remote Mode Switch and harness connectors for the switch. C. At the connector of the remote control harness check the voltage between contact 1 ( 131-RD(Red)) and contact 5 (J842-BK(Black)).	The voltage between contact 1 (131-RD(Red)) and contact 5 (J842-BK(Black)) is approximately 24 VDC.	OK – The voltage between contact 1 ( 131-RD(Red)) and contact 5 (J842-BK(Black)) is approximately 24 VDC. Proceed to Test Step 5. Not OK – The voltage between contact 1 ( 131-RD(Red)) and contact 5 (J842-BK(Black)) is NOT approximately 24 VDC. Repair: Check the power ( 131-RD(Red)) and ground (J842-BK(Black)) circuits in the machine and RC harness. Refer to the Electrical Schematics for the Machine and RC System for detailed circuit information. STOP.
Test Step 5. Check the Manual/Remote Mode Switch Position. A. Ensure that the Manual/Remote Mode Switch is in the REMOTE position.	The Manual/Remote Mode Switch is in the REMOTE position.	OK – The Manual/Remote Mode Switch is in the REMOTE position. Proceed to Test Step 6. Not OK – The Manual/Remote Mode Switch is in the MANUAL position. Repair: Place the Manual/Remote Mode Switch in the REMOTE position. STOP.
Test Step 6. Check the Operation of the Manual/Remote Mode Switch. A. Turn the Disconnect switch to the OFF position. B. Use the information provided in Illustration 2 to verify that the Manual/Remote Mode Switch is functioning correctly.	The Manual/Remote Mode Switch is functioning correctly.	OK – The Resistance measurements are in accordance with Illustration 2. Proceed to Test Step 7. NOT OK – The Resistance measurements are not in accordance with Illustration 2. Repair: The Manual/Remote Mode Switch has failed. Replace the Manual/Remote Mode Switch. STOP.
Test Step 7. Check the Input Power of Indicator Control ECM. A. Reconnect the Manual/Remote Mode Switch. B. Turn the Machine Disconnect switch to the ON position. C. Place the Manual/Remote Mode Switch to the REMOTE position. D. Remove the six bolts that secure the ROPS Enclosure to gain access to the Indicator Control ECM. E. Use a Multimeter Probe group to measure the voltage between the following sets of contacts on the 70 pin connector of the Indicator Control ECM. a. Contact 70 (638-WH(White)) and contact 68 (200-BK(Black) ). b. Contact 57 (638-WH(White)) and contact 68 (200-BK(Black) ).	The voltage present between both sets of contacts is approximately 24 VDC.	OK – The voltage present between both sets of contacts is approximately 24 VDC. Proceed to Test Step 8. NOT OK – The voltage present between both sets of contacts is not approximately 24 VDC. Repair: The 24VDC is provided via the RC Indicator Relay and the associated Remote Control harness and connections. The RC Indicator relay, the relay block, or the Remote Control harness has failed. Use the Electrical Schematic for the System to troubleshoot the relay and/or the remote control harness. STOP.
Test Step 8. Check the Green Lamp Output Circuit at the Indicator Control ECM A. The Machine Disconnect switch remains in the ON position. B. The Manual/Remote Mode Switch remains in the REMOTE position. Note: The Blue indicators will turn on when the RC System is turned on and the Manual/Remote Mode Switch was in the REMOTE position at the time of power up. C. Use a Multimeter Probe group to measure the voltage between contact 11 ( H416-GN(Green)) and contact 68 (200-BK(Black)) on the 70 pin connector of the Indicator Control ECM.	The voltage present between the contacts is approximately 24 VDC.	OK – The voltage present between the contacts is approximately 24 VDC. Repair: The Blue indicators and/or the associated harnesses for the indicators have failed. Use the electrical schematic for the system to isolate the failed component. STOP. NOT OK – The voltage present between the contacts is not approximately 24 VDC. Repair: The Indicator Control ECM is not providing power to the Blue indicators. The Indicator Control ECM has failed. Replace the Indicator Control ECM. STOP.