3840122 Volvo.Penta Engine anchorage

Table 1
Setting For Transmission Style Parameter Necessary Switches
Service Brake (Switch 1) Service Brake (Switch 2) Clutch Neutral
Manual X X
Automatic Option 1 X
Automatic Option 2 X X
Automatic Option 3 X X X
Automatic Option 4 X X
Eaton Top 2 X X A service brake pedal position (switch 1) is required for all configurations. The service brake pedal position (switch 1) connects to the ECM through connector P1-45. The service brake pedal position (switch 2) connects to the ECM through connector P1-64. The neutral switch connects to the ECM through connector P1-62. The neutral switch can also connect to the Engine Control Module (ECM) through J1939.
Illustration 1 g01256957
Schematic for the transmission neutral switch
Test Step 1. Determine the Type of Problem
Connect Caterpillar Electronic Technician (ET) to the service tool connector.
Turn the keyswitch to the ON position.
If the vehicle will not allow setting a cruise speed, an idle speed or a PTO speed, check the following customer parameters: Cruise Control Parameters
"Low Cruise Control Speed Set Limit"
"High Cruise Control Speed Set Limit"Idle Parameters
"Idle Vehicle Speed Limit"
"Idle RPM Limit"
"Top Engine Limit" (TEL)PTO Parameters
"PTO Configuration"
"PTO Vehicle Speed Limit"
"Transmission Neutral Switch"
Ensure that the vehicle is not experiencing a problem due to the setting of one of these parameters. Refer to Troubleshooting, "Customer Specified Parameters" for a description of the parameters, if necessary.
Check the status screen on Cat ET that indicates the last cause of a kickout for one of the following modes:
Cruise kickout
Idle kickout
PTO kickoutExpected Result:The problem is due to a parameter setting or the problem is due to a normal kickout.Results:
OK - The problem is due to a parameter setting or the problem is due to a normal kickout.Repair: Explain the proper operation of system to the driver.STOP
Not OK - The problem is not due to a parameter setting. The system experienced an abnormal kickout. A problem is still suspected with the neutral switch circuit. Proceed to Test Step 2.Test Step 2. Inspect the Electrical Connectors and the Wiring
Illustration 2 g01186024
Location of the J1/P1 ECM connectors (typical left side engine view)
Thoroughly inspect the J1/P1 ECM connector, the firewall bulkhead connector and the connector for the transmission neutral switch. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Illustration 3 g01257044
Terminal locations at the P1 ECM connector for the transmission neutral switch
(P1-62) Input No. 12 (transmission neutral switch)
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the switch.
Check the allen head screw for each of the ECM connectors for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
Check the harness and wiring for abrasion and for pinch points from the switch to the ECM. Expected Result: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.Results:
OK - The harness and connectors appear to be OK. Proceed to Test Step 3.
Not OK - 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.STOPTest Step 3. Check the Status of the Transmission Neutral Switch
Table 2
Expected Status for the Transmission Neutral Switch
Transmission Status Switch Status