C13 and C15 On-highway Engines Caterpillar

Most of the switch inputs to the Engine Control Module (ECM) must be programmed to match the vehicle wiring. The switch inputs can be programmed to a specific terminal on the P1 connector or to a J1939 device on the vehicle.

The engine ECM activates a diagnostic trouble code if a switch input is programmed to a J1939 device and there is a problem with the data link information for that switch input. Table 1 lists the codes that can be activated.

Illustration 1 shows the portion of the system that can cause each diagnostic trouble code.

Illustration 1	g01416735
The portion of the J1939 data link that can cause each diagnostic trouble code

The following information will be helpful as you perform this procedure.

• The J1939 devices that are installed on the vehicle

• The list of switches that are connected to each J1939 device

Test Step 1. Determine the Failure Mode Identifier

Determine the type of code.

Expected Result:

There is a -9 code.

Results:

• There is a -9 code. - The engine ECM is receiving no information about the switch.

  Repair: Perform the following procedure:

  1. Verify that the switch input is programmed to the correct J1939 device.

     Program the switch input to every possible J1939 device if you do not know the vehicle configuration. Wait for a few seconds after the switch input is programmed to a J1939 device. Then, determine if the -9 code is gone.

     Continue with this procedure, if necessary.

  2. If programming the switch input does not solve the problem, there may be a problem with the J1939 device. Check for the following conditions:

     • The J1939 device is receiving electrical power.

     • The J1939 device is programmed correctly.

     Refer to the troubleshooting information for the J1939 device. Make the necessary repairs.

  3. Check the wiring for the J1939 data link. The usual failure mode for the wiring is an open circuit.

  STOP

• There is a -19 code - The wiring for the J1939 data link is OK. The switch input is programmed correctly.

  Repair: Perform the following procedure:

  1. Check the operation of the J1939 device. Check for the following conditions:

     • The J1939 device is receiving electrical power.

     • The J1939 device is programmed correctly.

     Refer to the troubleshooting information for the J1939 device. Make the necessary repairs.

  2. Check the switch and the wiring between the switch and the J1939 device if the J1939 device is operating correctly. Make the necessary repairs.

  STOP

• There is a -14 code. -

  Repair: Perform the following procedure:

  1. Determine if the device is programmed correctly. If you have a manual transmission, reprogram the Transmission Neutral Start Interlock parameter to disabled. If you have an automatic transmission, and the engine output is being used to control the starter, make sure that the Transmission Neutral Start Interlock parameter is set to Enabled. The Engine Running Output should be programmed to pin 29, 30, or 31. The output is then based upon the engine speed AND the crank enable value received from the transmission.

  2. If the ECM pin programmed to the Engine Running Output parameter has a plug in it instead of a wire, the Engine Running Output parameter is misconfigured. Reconfigure the Engine Running Output parameter to disabled.

  3. Make sure the J1939 device is receiving electrical power.

  4. Check the wiring for the J1939 data link. The usual failure mode for the wiring is an open circuit. Make the necessary repairs.

  STOP