Marine Multi-Station Control System Caterpillar

• Troll Mode does not activate

Probable Causes

• The PCP has lost communication from either the Port ETP or the Starboard ETP

• The ETP is not functioning

• There is fault in the cabling

For TD MGX Series gear boxes, set the transmission neutral pressure to 0 psi in order to disable the Transmission Not Responding diagnostic.

Troll Mode

Traditional Troll - While the traditional Troll Mode is active, pressing, and holding the SVM button (on the ICH or button panel) will cause the troll Set Engine Speed to increase up to the Max Troll set Speed value and then pressing the N (Neutral Lockout) will cause the engine speed to decrease to programmed low idle. The new Troll set Speed will be reset to idle (0 % throttle) when troll mode is deactivated or if the system power has been reset. Move the throttle lever to control slip (idle position is Max slip, increasing throttle position decreases slip.

Advanced Troll - Advanced Troll provides greater control of the transmission slip. The throttle lever is used to control transmission slip in conjunction with engine speed to increase slip at lower engine speeds. This also provides a smooth transition from troll to the non-troll application. As the throttle increases to the Max Troll Set Speed, engine speed will increase and the percent slip will decrease from 100 percent at idle to 20 percent at maximum troll speed (default value 1200 rpm). From maximum troll set speed to WOT the transmission is fully engaged.

Troll Set Speed - Minimum troll engine speed

Max Troll Set RPM - Maximum Speed at which Troll Mode will kick out.

Percent Slip @ Idle (Traditional Troll) - The amount of slip when the throttle is in the low idle

Percent Slip@Idle (Advanced Troll) - The amount of slip when the throttle is in the low idle position

Max RPM @ Full Engage (Advanced Troll) - Engine speed at which the troll slip is commanded to Full Engage

Number of Engines - Designates the number of engines that are in the vessel.

Transmission Type - Select the type of gear use in the vessel

Electronic Troll Processor (ETP) Connections

Illustration 1	g03329853
ETP connections (1) 323-7317 Engine Speed Control Gp (2) ETP to Troll Cable 226-0417 Control Harness As or 243-4211 Control Harness As or 243-4212 Control Harness As (3) 226-3424 Speed Sensor Gp (4) To troll valve (5) 308-0432 Pin As (6) 346-1577 Connector (7) 225-6107 Panel Harness As (8) 6-pin engine connector

1. Turn the Keyswitch “ON” for all propulsion engines.

2. Press "STATION ACTIVE" button on any control station.

3. Press "TROLL" button and observe the Troll LED. Does the Troll LED turn on?

   YES - The Troll LED illuminates, Go to Step 4

   NO - There is a problem with the control head or J1939 communications with the ETP. Perform the procedure in the , "Button Panel - Test" in the Troubleshooting Section of this Manual for the "TROLL" button. Did the "TROLL" button pass the button panel test?

   YES - There is a problem with the J1939 communications with the ETP. Go to "ETP J1939 Connection" troubleshooting section.

   NO - Troubleshooting using Switch Inputs Not Working. Correct the problem and retest.

4. Perform a sea trail test in a location where the vessel can maneuver safely. Did the Troll Mode operate as expected?

   YES - Troll mode is operating

   NO - There is a problem with the ETP or wiring from the ETP to the troll valve. Continue with Step 5.

5. Determine the troll valve type by looking at the manufactures name plate and referring to Table 2. Verify that proper cables are connected to the ETP.

6. Connect Cat ET and verify the PCP Configuration setting for Transmission Type.

Current Controlled Troll Valve

If the troll valve uses current control signal, then make the following connections for measuring troll valve current:

Measuring Troll Valve Current

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Illustration 2	g03330279

1. Disconnect the Troll 4-pin connector and remove pin 1 from both connectors.
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   Illustration 3	g03330282

2. Set the Digital Multimeter (DMM) to measure current.
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   Illustration 4	g03330283

3. Connect the DMM.

   1. Keep pin 1 out from both connectors and connect the 4-pin connector together.

   2. Connect the red probe from the DMM to the socket (Harness to ETP.

   3. Connect the black probe from the DMM to the pin (Harness to Troll Valve).

   4. Turn the system ON, Engine OFF

   5. Activate Troll and move the throttles while measuring the current.

4. Place the MSCS in Traditional Troll Mode.

5. Select Troll mode.

6. Place the handles in Idle/Forward position.

7. The current measurement should read "Max Slip" value (+/- 5 percent) from Table 2.

8. Place the handles in WOT Forward position.

9. The current measurement should read "Min Slip" value (+/- 5 percent) from Table 2. Are the measured values correct?

10. Are the measured values correct?

    YES - The troll valve is not functioning. Troubleshoot the troll valve.

    NO - There is a wiring problem or the ETP is faulted. Temporarily replace the ETP and retest. If the problem is not corrected then troubleshoot the wiring from the ETP to the troll valve.

Voltage Controlled Troll Valve

If the troll valve uses voltage control signal then measure the troll valve control voltage:

1. Measure the voltage between pin 2 and 3.

2. Place the MSCS in Traditional Troll Mode.

3. Select Troll mode.

4. Place the handles in Idle/Forward position.

5. The current measurement should read "Max Slip" value (+/- 5 percent) from Table 2.

6. Place the handles in WOT Forward position.

7. The current measurement should read "Min Slip" value (+/- 5 percent) from Table 2. Are the measured values correct?

8. Are the measured values correct?

   YES - The troll valve is not functioning. Troubleshoot the troll valve.

   NO - There is a wiring problem or the ETP is faulted. Temporarily replace the ETP and retest. If the problem is not corrected, then troubleshoot the wiring from the ETP to the troll valve.

ETP J1939 Connection

1. Connect Cat ET to the Port engine service connector.
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   Illustration 5	g03329990

2. Select "Powertrain Control".
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   Illustration 6	g03329995

3. Select the Status icon.
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   Illustration 7	g03329997

4. Select "Status Group #4".

5. Monitor the ETP Voltage. Is the voltage displayed for this ETP?

   YES - The Port side is communicating with the ETP. Continue Troubleshooting in Step 6.

   NO - There is a problem with the Port side J1939 communications with the ETP. Troubleshoot the J1939 wiring from the 6-Pin connector on the engine down to the ETP. IF the wiring is correct, temporarily replace the ETP and retest.

6. In Cat ET, disconnect the communication to the Port J1939. Unplug the communications adapter on the Port side and connect it to the Starboard engine service connector.

7. In Cat ET, reconnect the communication to the Starboard J1939.

8. Select "Powertrain Control"

9. Select the Status icon

10. Monitor the ETP Voltage. Is the voltage displayed for this ETP?

    YES - The Starboard side is communicating with the ETP. Return to the troubleshooting section

    NO - There is a problem with the Starboard side J1939 communications with the ETP. Troubleshoot the J1939 wiring from the 6-Pin connector on the engine down to the ETP. IF the wiring is correct, temporarily replace the ETP and retest.

J1939 Wiring Troubleshooting

Illustration 8	g01195878

1. Disconnect the J1939 data link from the PCP. The data link connector is named Throttle/J1939, on some older PCPs the connector is labeled "ECM/ETP". Measure the resistance between pins 1 and 2. The resistance should be between 65 and 55 ohms.

   OK - The resistance is with in the correct range. There are two terminating resistors on the harness.

   NOT OK - The resistance is between 130 and 110 ohms. The data link is missing a terminating resistor or there is an open circuit in the data link. Go to Step 1.

   NOT OK - The resistance is greater than 20K ohms. There is an open circuit in the data link or both termination resistors are missing. Recheck connectors and repair as required.

2. Disconnect the data link from the tee connector at the PCP J1939 drop.

3. Measure the resistance between pins 1 and 2 on both data link connectors. The resistance should be between 55 and 65 ohms for each measurement.

   OK - The resistance is with in the correct range. Go to Step 2.

   NOT OK - The resistance is incorrect. There is an open circuit or missing termination resistor in the circuit. Continue measuring the resistance down through the circuit until the resistance is within the correct range. Repair as required.

4. Measure the resistance between the wires and the ETP drop harness. The resistance should be less than 10 ohms for each measurement. Wiggle the harness during measurement to verify that there is not an intermittent connection.

   OK - The resistance is with in the correct range. Reconnect the system and retest.

   NOT OK - The resistance is not in the correct range. Replace the ETP drop harness.