Conditions Which Generate This Code:
Schematic for the Seat switch
The seat switch has two inputs to the machine electronic control module (ECM). During normal operation, one input is grounded while the other input is open. If an invalid combination is detected by the ECM, a circuit failure is present. The diagnostic code is recorded when both inputs for the "Seat" switch are grounded. The diagnostic code is set in 5 seconds. After the problem has been corrected, the diagnostic code will be clear within 1 second.
Note: Ensure that the desired diagnostic code is active.
This diagnostic code is associated with the "Seat" switch. This switch has two inputs to the ECM: normally open (wire E750-PU) and normally closed (wire X740-BU). During normal operation, one switch input is open and the other input is grounded. If each input is in the grounded state, a CID 1009 FMI 04 diagnostic code will be issued by the Machine ECM. This diagnostic code is detected if both of the switch inputs are grounded at the same time.
Note: The following procedure can create other diagnostic codes that can be detected by the ECM. Ignore these created diagnostic codes and clear the created diagnostic codes when this diagnostic code is corrected.
Possible causes of this diagnostic code are listed:
- The harness has failed.
- The switch has failed.
The machine response is listed:
- The autoshift is disabled.
Test Step 1. CHECK FOR AN OPEN CIRCUIT.
- Ensure that the diagnostic code is active.
- Observe the ON/OFF status of the diagnostic code.
- Disconnect the connector of the seat switch from the machine harness.
The active diagnostic code changes from "04" to "03".
- YES - The seat switch or the harness of the seat switch has failed. Perform Step 1 again in order to verify the failure of the switch.
Repair: Repair the switch or replace the switch if the switch has failed. Repair the switch or replace the switch harness if the switch harness has failed.
- NO - The seat switch is not the cause of the failure. Proceed to Test Step 2.
Test Step 2. CHECK THE HARNESS CIRCUIT.
This test checks the continuity of the entire harness circuit that has failed. The seat switch which was previously checked in Step 1 is included in this test.
- Turn the key start switch and the disconnect switch to the OFF position.
- Reconnect the seat switch to the machine harness.
- Disconnect the machine harness from the ECM.
- At the machine harness connector for the ECM, check the continuity to ground of the open contacts and the grounded contact for each position of the seat switch. Activate and deactivate each position of the seat switch. Record the measurement of the resistance for each position of the switch. The resistance should measure less than 5 ohms and greater than 5000 ohms for each position of the switch.
The resistance should measure less than 5 ohms and greater than 5000 ohms for each position of the switch.
- YES - The resistance measurement is less then 5 ohms and greater than 5000 ohms for each measurement of the switch. The harness circuit has failed. There is a short to ground in the machine harness between the ECM and the switch.
Repair: Repair the machine harness or replace the machine harness.
- NO - The resistance is correct for each measurement. The harness circuit is correct. It is unlikely that the ECM has failed. Exit this procedure and perform CID 1009 FMI 04 again.
Repair: If the cause is not found, replace the ECM. Refer to Troubleshooting, "Electronic Control Module (ECM) - Replace" for more information on replacing the ECM.