ADAPTER 2802424 - Caterpillar

Illustration 1 g00735793
Schematic of the rear retarder control solenoid
This diagnostic code is associated with the rear retarder control solenoid. This diagnostic code is recorded when the Power Train/Chassis Electronic Control Module (ECM) reads the current of the solenoid as being above normal.The possible causes are listed:
A wire is shorted to frame ground.
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 1608 FMI 06 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.System Response:The rear retarder control solenoid is always de-energized. The ECM will not be able to energize the rear retarder control solenoid. The Automatic Retarder Control (ARC) will continue to operate using the front retarder control solenoid. The ARC system will operate at a reduced level of performance.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 K744-BU(Blue)) to contact 2 (wire E790-PK(Pink)).
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 A SHORT TO GROUND.
The machine harness remains disconnected from the solenoid.
Turn the key start switch and the battery disconnect switch to the OFF position.
Disconnect the J1 and J2 machine harness connector from the ECM.
At the J2 machine harness connector, measure the resistance from the solenoid contact J2-2 (wire K744-BU(Blue)) to all possible sources of frame ground. Expected Result:Each resistance measurement should be greater than 5 ohms.Results:
YES - The machine harness is correct. Proceed to Test Step 3.
NO - There is an short in the machine harness.Repair: The short is between the wire for the solenoid signal and the circuit with the low resistance measurement. 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 1608 FMI 06. Expected Result:The CID 1608 FMI 06 is active. Results:
YES - The CID 1608 FMI 06 is active. The diagnostic code has not been corrected. The ECM may have failed.Repair: It is unlikely that the ECM has failed. Exit this procedure and perform this procedure again. If the cause of the diagnostic code is not found, replace the ECM. Refer