5031851 JOHNSON WASHER

Illustration 1 g01332001
Schematic diagram for the indicator lamps (31 pin Machine Interface Connector)
Illustration 2 g01332006
Schematic diagram for the indicator lamps (70 pin Machine Interface Connector)
Illustration 3 g01625527
ECM pin locations for the indicator lamps
(12) Warning lamp
(13) Set speed active lamp
(23) Engine shutdown lamp
(56) Battery +
(57) Battery +
(68) Battery -
(69) Battery -
Illustration 4 g01625529
Pin locations for the indicator lamps on the 31 pin Machine Interface Connector (MIC)
(1) Battery +
(2) Battery -
(10) Warning lamp
(11) Set speed active lamp
(12) Engine shutdown lamp
Illustration 5 g01332004
Pin locations for the indicator lamps on the 70 pin Machine Interface Connector (MIC)
(12) Warning lamp
(13) Set speed active lamp
(23) Engine shutdown lamp
(57) Battery +
(69) Battery - Test Step 1. Inspect Electrical Connectors and Wiring
Turn the keyswitch to the OFF position.
Thoroughly inspect J1/P1 ECM connector, and the J20/P20 MIC. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the P20/J20 connector and the P1/J1 connector that are associated with the diagnostic lamps. Refer to illustration 1 or 2.
Check the Allen head screw on the J1/P1 connector for the correct torque of 6.0 N m (55 lb in).
Check the harness for abrasions and for pinch points from the battery to the ECM. Results:
OK - Proceed to Test Step 2.
Not OK - Repair: Repair the connectors or the harness and/or replace the connectors or the harness. Ensure that all of the seals are correctly installed and ensure that the connectors are completely coupled.Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault. STOPTest Step 2. Inspect the Lamp, the Fuse, and the Power Supply
Disconnect the lamp from the harness. Inspect the lamp in order to determine if the lamp has failed.
Measure the resistance across the two terminals of the lamp. If the resistance is more than 2000 ohms, the bulb has failed.
Check the battery by connecting a test lamp across the terminals of the battery. Expected Result:The lamp has less than 2000 ohms and the power supply is OK.Results:
OK - The lamp appears to be operating correctly at this time. Proceed to Test Step 3.
Not OK - Repair: Replace the suspect component or repair the suspect component. Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.STOPTest Step 3. Measure the Input to the Lamp at the Lamp Socket
Turn the keyswitch to the ON position.
Use the electronic service tool to select the "override" function in order to switch individual lamps ON and OFF. Note: The "Override" function is contained in the "Diagnostics" menu of the electronic service tool.
Measure the voltage at the lamp socket. Expected Result:The voltage should be between 12.0 Volts DC and 24.0 Volts DC.Results:
OK - The voltage is between 12.0 Volts DC and 24.0 Volts DC.Repair: Replace the bulb.Verify that the repair eliminates the fault.If the fault persists, measure the resistance across the 2 terminals of the lamp. If the resistance is more than 2000 ohms, the replacement bulb has failed. Replace the bulb and repeat the test.If the fault persists, proceed to Test Step 4.
Not OK - The voltage is not in the range that is expected. Proceed to Test Step 5.Test Step 4. Test the Individual Lamp Circuits
Disconnect ECM Connector J1/P1.
Insert a 70-Pin Breakout T between ECM Connector J1 and ECM Connector P1.
Fabricate a jumper wire 100 mm (4 inch) long. Crimp a Deutsch pin to both ends of the wire.
Insert one end of the jumper wire into the socket for the driver for the suspect lamp.
Insert the other end of the jumper wire into the socket for battery +.
Turn the keyswitch to the ON position and observe the lamp. Expected Result:The diagnostic lamp turns on while the jumper is connected to both sockets. Also, the diagnostic lamp turns off when the jumper is removed from one of the sockets.Results:
OK - The circuit for the diagnostic lamp is functioning correctly. Proceed to Test Step 5.
Not OK - The lamp did not turn on. The lamp circuit is not functioning correctly. There is a fault in the wiring between the lamp and the ECM.Repair: Repair the lamp circuit.Verify that the repair eliminated the fault.STOPTest Step 5. Check the Voltage at the ECM
Disconnect ECM Connector J1/P1.
Insert a 70-Pin Breakout T between ECM Connector J1 and ECM Connector P1.
Connect a voltage test lamp between J1:57 Battery + and J1:69 Battery -.
On applications with a 31 pin MIC, connect a voltage test lamp to J1:56 Battery + and J1:12 Warning Lamp. Connect the voltage test lamp to J1:56 Battery + and J1:13 Set Speed Active Lamp. Connect the voltage test lamp to J1:56 Battery + and J1:23 Engine Shutdown Lamp.
On applications with a 70 pin MIC, connect a voltage test lamp to J1:57 Battery + and J1:12 Warning Lamp. Connect the voltage test lamp to J1:57 Battery + and J1:13 Set Speed Active Lamp. Connect the voltage test lamp to J1:57 Battery + and J1:23 Engine Shutdown Lamp. Expected Result:The lamps should illuminate.Results:
OK - The ECM is operating correctly.Repair: There is a fault in the wiring or one of the lamps.
Repair the wiring or the lamp, as required.
Verify that the repair eliminates the fault. STOP
Not OK - The ECM may have a suspected fault.Repair: Perform the following procedure:
Temporarily connect a test ECM. Note: The test ECM must be programmed with the same parameters as the suspect ECM.
Check the operation of the diagnostic lamp when the test ECM is installed.
If the fault is resolved with the test ECM, then reconnect the suspect ECM.
If the fault returns with the suspect ECM, then replace the suspect ECM. STOP