988G Wheel Loader Electrohydraulic System MID 082 - CID 0490

MID 082 - CID 0490 - FMI 04

988G Wheel Loader Electrohydraulic System [RENR2171]

988G Wheel Loader Electrohydraulic System MID 082 - CID 0490 - FMI 03

ELECTRICAL AND STARTING SYSTEM

SWITCH GP

988G Wheel Loader Electrohydraulic System MID 082 - CID 0489 - FMI 04

988G Wheel Loader Electrohydraulic System MID 082 - CID 0489 - FMI 03

988G Wheel Loader Electrohydraulic System MID 082 - CID 1667 - FMI 03

988G Wheel Loader Electrohydraulic System MID 082 - CID 1667 - FMI 04

988G Wheel Loader Electrohydraulic System MID 082 - CID 0365 - FMI 04

988G Wheel Loader Electrohydraulic System MID 082 - CID 0490 - FMI 03

988G Wheel Loader Electrohydraulic System MID 082 - CID 0490 - FMI 04

Conditions Which Generate This Code:

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Illustration 1	g00388737
Schematic of the Rocker Switch (Implement Lockout)

This diagnostic code is associated with the Rocker Switch (Implement Lockout). The switch is connected to two inputs of the ECM. The inputs are "Normally Open" and "Normally Closed". One of the inputs is open and the other input is grounded during proper operation.

The FMI 04 means that the ECM has determined that the "Normally Open" and "Normally Closed" circuits are grounded.

Note: The following test procedure may create other diagnostic codes. Ignore these diagnostic codes and clear these diagnostic codes when the original diagnostic code has been corrected.Ensure that the diagnostic code of CID 0490 FMI 04 is active before performing this procedure.

System Response:

The implements will not work.

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Table 1
Switch Continuity
"Switch / CID"	Switch State	Implement ECM Connector Contact Number	Switch Contact	Wire Number	Status
CID 0490 Implement Lockout Switch	Not Locked	J1-13 "N/O" ⁽¹⁾	"N/O"	E917-WH	O ⁽²⁾
	Not Locked	J1-14 "N/C" ⁽³⁾	"N/C"	E918-GN	G ⁽⁴⁾
	Locked	J1-13 "N/O"	"N/O"	E917-WH	G
	Locked	J1-14 "N/C"	"N/C"	E918-GN	O

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^( 1 )	Normally Open Position
^( 2 )	Open
^( 3 )	Normally Closed Position
^( 4 )	Grounded

Test Step 1. CHECK THE SWITCH

Turn the key start switch and the disconnect switch to the OFF position.

Disconnect the machine harness from the switch.

Turn the disconnect switch and the key start switch to the ON position. Do not start the engine.

Expected Result:

The CID 0490 FMI 04 diagnostic code has been replaced by a CID 0490 FMI 03 diagnostic code.

Results:

OK - The CID 0490 FMI 04 diagnostic code has been replaced by a CID 0490 FMI 03 diagnostic code. The machine harness and the ECM are correct. Proceed to Test Step 3.
NOT OK - The CID 0490 FMI 04 diagnostic code is still active. Proceed to Test Step 2.

Test Step 2. CHECK THE HARNESS

Turn the disconnect switch and the key start switch to the OFF position.

The machine harness remains disconnected from the switch.

Disconnect the machine harness connector(s) from the ECM.

Measure the resistance between contacts J1-13 (wire E917-WH) and J1-14 (wire E918-GN) of the machine harness to all the contacts that are used in machine harness connectors for the ECM.

Expected Result:

Each resistance measurement is greater than 5000 ohms.

Results:

YES - Each resistance measurement is greater than 5000 ohms. The ECM has 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. See Testing And Adjusting, "Electronic Control Module (ECM) - Replace".
STOP
NO - One or more of the resistance measurements are less than 5000 ohms. The harness has failed. The short is between J1-13 (wire E917-WH) and the circuit with the lowest resistance or the short is between J1-14 (wire E918-GN) and the circuit with the lowest resistance.
Repair: Repair the wiring harness or replace the wiring harness.
STOP

Test Step 3. CHECK THE OPERATION OF THE SWITCH

The disconnect switch and the key start switch remain in the OFF position.

The machine harness remains disconnected from the switch.

Connect one lead from a multimeter to contact2 (wire 299-BK) of the harness connector for the switch.

Connect the other lead from a multimeter to contact 3 (wire E917-WH) of the harness connector for the switch.

Measure the resistance between contact 2 (wire 299-BK) and contact 3 (wire E917-WH). Note the resistance.

Disconnect the lead from contact 3 (wire E917-WH) and connect the lead to contact 1 (wire E918-GN).

Measure the resistance between contact 2 (wire 299-bk) and contact 1 (wire E918-GN).

Expected Result:

The resistance from contact 2 (wire 299-BK) to contact 1 (wire E918-GN) is less than 5 ohms, and the resistance from contact 2 (wire 299-BK) to contact 3 (wire E917-WH) is greater than 5000 ohms.

Results:

YES - The resistance from contact 2 (wire 299-BK) to contact 1 (wire E918-GN) is less than 5 ohms, and the resistance from contact 2 (wire 299-BK) to contact 3 (wire E917-WH) is greater than 5000 ohms. Proceed to Test Step 4.
NO - The resistance measurements do not differ. The switch has failed.
Repair: Replace the switch.
STOP

Test Step 4. CHECK THE OPERATION OF THE SWITCH

The disconnect switch and the key start switch remain in the OFF position.

The machine harness remains disconnected from the implement lockout switch.

Press and hold the implement lockout switch.

Connect one lead from a multimeter to contact 2 (wire 299-BK) of the harness connector for the switch.

Connect the other lead from a multimeter to contact 3 (wire E917-WH) of the harness connector for the switch.

Measure the resistance between contact 2 (wire 299-BK) and contact 3 (wire E917-WH). Note the resistance.

Disconnect the lead from contact 3 (wire E917-WH) and connect the lead to contact 1 (wire E918-GN).

Measure the resistance between contact 2 (wire 299-BK) and contact 1 (wire E918-GN).

Expected Result:

The resistance from contact 2 (wire 299-BK) to contact 3 (wire E917-WH) is less than 5 ohms, and the resistance from contact 2 (wire 299-BK) and contact 1 (wire E918-GN) is greater than 5000 ohms. These measurements are opposite of the measurements from the previous Test Step.

Results:

YES - The resistance from contact 2 (wire 299-BK) to contact 3 (wire E917-WH) is less than 5 ohms, and the resistance from contact 2 (wire 299-BK) and contact 1 (wire E918-GN) is greater than 5000 ohms. These measurements are opposite of the measurements from the previous Test Step. The switch is operating correctly. Proceed to Test Step 5.
NO - The resistance measurements do not differ for both contacts, or the measurements have not changed from the previous Test Step. The switch has failed.
Repair: Replace the switch.
STOP

Test Step 5. CHECK IF THE DIAGNOSTIC CODE REMAINS

The disconnect switch and the key start switch remain in the OFF position.

Inspect the contacts of the harness connectors and clean the connectors.

Reconnect all harness connectors.

Turn the disconnect switch to the ON position.

Start the machine.

Operate the machine.

Determine if the CID 0490 FMI 04 diagnostic code is present.

Expected Result:

The CID 0490 FMI 04 diagnostic code is active.

Results:

YES - The CID 0490 FMI 04 diagnostic code 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. See Testing and Adjusting, "Electronic Control Module (ECM) - Replace".
STOP
NO - The CID 0490 FMI 04 diagnostic code is not active. The diagnostic code is NOT present. The diagnostic code does not exist at this time.
Repair: The initial diagnostic code was probably caused by a poor electrical connection or a short at one of the harness connectors that was disconnected and reconnected. Resume normal machine operation.
STOP