鈬揑f infinite resistance
4.3Test for less than 2 锟?in the 10 V reference circuits end to end.
-If 2 锟?or greater, repair the open/high resistance in the circuit.
-If less than 2 锟?replace the Assist Step Control Module.
-
If greater than 11 V
4.1Ignition OFF, disconnect the X2 harness connector at the Assist Step Control Module control module, ignition ON.
4.2Test for less than 1 V between the following 10 V reference circuit and ground.
-X2 Terminal A Running Board - Left
-X2 Terminal B Running Board - Right
-If 1 V or greater, repair the short to voltage on the appropriate circuit.
-If less than 1 V, replace the Assist Step Control Module.
锟?If between 9-11 V
5.Ignition OFF. Connect Running Board - Left actuator. Ignition ON.
6.Test for 9 - 11 V between the 10 V reference circuit terminal D at the right side and ground while commanding the actuator with the scan
tool.
-
If not between 9-11 V
Test or replace Running Board - Left actuator.
锟?If between 9-11 V
7.Ignition OFF. Disconnect Running Board - Left, connect Running Board - Right. Ignition ON.
8.Test for 9 - 11 V between the 10 V reference circuit terminal D at the left side and ground while commanding the actuator with the scan tool.
-
If not between 9-11 V
Test or replace Running Board - Right actuator.
锟?If between 9-11 V
9.Test for greater than 9 V between the appropriate signal circuit terminal E and ground while commanding the actuator with the scan tool.
-
If not greater than 9 V
9.1Ignition OFF, disconnect the X2 harness connector at the Assist Step Control Module.
9.2Test for infinite resistance between the following signal circuit terminals and ground.
-X2 Terminal C Running Board - Left
-X2 Terminal D Running Board - Right
-If less than infinite resistance, repair the short to ground on the appropriate circuit.
鈬揑f infinite resistance
9.3Test for less than 2 锟?in the signal circuits end to end.
-If 2 锟?or greater, repair the open/high resistance in the circuit.
-If less than 2 锟?replace the Assist Step Control Module.
-
If 9 V or greater
10.Connect a test lamp between the control circuit terminal A and the control circuit terminal B.
11.Verify the test lamp turns on and off while commanding the appropriate board to Extend and Retract with a scan tool.
