MUFFLER 2824157 - Caterpillar

Illustration 1 g00735667
Schematic of the downshift solenoid
This diagnostic code is associated with the downshift solenoid. This diagnostic code is recorded when the Power Train/Chassis Electronic Control Module (ECM) reads the current of the solenoid as being below normal.The possible causes are listed:
There is an open in the circuit.
The solenoid has failed.
The ECM has failed. This is unlikely.Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear these diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 0708 FMI 05 is active before performing this procedure.System Response:The downshift solenoid is always off. The machine does not shift into lower gears. The machine will upshift normally. If the diagnostic code occurs and the transmission is in the neutral position, the transmission will remain in neutral position until the diagnostic code is corrected. Before normal operation can resume, the shift lever must return to the NEUTRAL position. If the diagnostic code occurs and the transmission is in any gear position but the neutral position, additional actions are not required. Normal operation can resume after the diagnostic code has been corrected.Test Step 1. CHECK THE SOLENOID.
Turn the battery disconnect switch and the key start switch to the ON position.
Disconnect the machine harness from the solenoid.
At the machine harness connector for the solenoid, place a jumper wire from contact 1 (wire 704-GY(Grey)) to contact 2 (wire K972-BR(Brown)).
Observe the status of the diagnostic code. Expected Result:The diagnostic code is active. Then, the diagnostic code is not active as the jumper wire is installed and removed. Results:
YES - The circuit is correct. The solenoid has failed.Repair: Repeat this test "CHECK THE SOLENOID" in order to verify that the solenoid has failed. Replace the solenoid.STOP
NO - The diagnostic code remains active. Proceed to Test Step 2.Test Step 2. CHECK THE SOLENOID CIRCUIT FOR AN OPEN.
Turn the key start switch and the battery disconnect switch to the OFF position.
Disconnect the J1 machine harness connector from the ECM.
At the machine harness connector for the solenoid, the jumper wire remains installed.
At J1 machine harness connector, measure the resistance from contact J1-7 (wire K972-BR(Brown)) to J1-18 (wire 704-GY(Grey)). Expected Result:The resistance should be less than 5 ohms.Results:
YES - The resistance is less than 5 ohms. The machine harness is correct. Proceed to Test Step 3.
NO - The resistance measurement is not correct. There is an open circuit in the machine harness.Repair: The open is in the wire for the solenoid signal or in (wire K972-BR(Brown)) of the machine harness. Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK IF THE DIAGNOSTIC CODE REMAINS
Inspect the contacts of the harness connectors and clean the harness connectors.
Reconnect all the harness connectors.
Turn the battery disconnect switch and the key start switch to the ON position.
Operate the machine.
Check the status of the CID 0708 FMI 05. Expected Result:The CID 0708 FMI 05 is active. Results:
YES - The CID 0708 FMI 05 is active. The diagnostic code has not