HARNESS AS-CONTROL 4676795 - Caterpillar

Illustration 4 g01625540
Pin locations on the 31 pin MIC
(21) On/Off Switch
(22) Speed No.1 or Speed No.2 Switch
(24) Resume/Accelerate Switch
(25) Set/Decelerate Switch
(26) Switch Return
(29) Clutch/Brake Automatic Disengage Switch
Illustration 5 g01332024
Pin locations on the 70 pin MIC
(11) Resume/Accelerate Switch
(19) Speed No.1 or Speed No.2 Switch
(20) Set/Decelerate Switch
(28) On/Off Switch
(29) Clutch/Brake Automatic Disengage Switch
(37) Switch Return Test Step 1. Inspect Electrical Connectors and Wiring
Turn the keyswitch to the OFF position.
Thoroughly inspect ECM connector J1/P1, Machine Interface Connector (MIC) J20/P20, and the battery connections. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Check the harness and wiring for corrosion, abrasion, and pinch points from the throttle switch to the ECM. Expected Result:All connectors, pins, and sockets should be completely inserted and coupled. The harness and wiring should be free of corrosion, abrasion, and pinch points.Results:
OK - Proceed to Test Step 2.
Not OK - Repair: Repair the circuit.Verify that the repair eliminates the fault.STOPTest Step 2. Check "Set Speed Switch" on the Electronic Service Tool
Turn the keyswitch to the OFF position.
Connect the electronic service tool to the diagnostic connector.
Turn the keyswitch to the ON position.
Observe the status of the set speed switch on the electronic service tool while you operate the set speed switch from the speed 1 position to the speed 2 position.
Observe the status of the set speed switch on the electronic service tool while you operate the set speed switch from the ON position to the OFF position.
Observe the status of the set speed switch while you operate the set speed/decelerate switch from the OFF position to the ON position.
Observe the status of the