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ABS / Air Bag 2004 User Guide

Special Test Descriptions

Motor Rehome Test

The Motor Rehome Test prepares the brake lines for bleeding by clearing air from the modulator. The test returns all ABS motors to their “home” positions.

For some vehicles, the NGIS tool runs the test auto- matically; for other vehicles, the tool displays instructional screens for you to perform the test manually.

IMPORTANT:

•Before rehoming the brake system, make sure no diagnostic codes are present.

•Do not let the master cylinder run dry during the rehoming or brake bleeding procedures.

•Do not allow brake fluid to contact the motor pack or the electrical connectors.

IMPORTANT: Use a recommended brake fluid, do not use silicone brake fluids in an ABS- equipped vehicle.

WARNING: After bleeding the brake system, check the brake pedal for excessive travel or a “spongy” feel. Bleed again if either condition is present.

Setup SDM Serial Number (Air Bag Sensing and Diagnostic Module)

The Setup SDM Serial Number in DIM test lets you program a new air bag serial number into the dash inte- gration module (DIM). You use this test after installing a new air bag; otherwise a diagnostic trouble code will be set when you turn on the ignition.

The tool displays instructional screens for you to per- form the test manually

Solenoid Tests

The Solenoid Tests let you use the NGIS tool to man- ually control the inlet and output valve solenoids.

You can confirm proper operation by comparing what you command with the NGIS tool to what the ECU sees as a response and to what the actual output is at the solenoid.

System Identification

The System Identification test displays information about the brake system, the vehicle, and the ABS controller.

Pump Motor Tests

The Pump Motor Tests lets you use the NGIS tool to manually control the pump motor. For some vehicles, the NGIS tool runs the test automatically; for other vehi- cles, the tool displays instructional screens for you to perform the test manually.

Relay Test

The Relay Test lets you use the NGIS tool to manually engage and disengage either the ABS or TCS relays in order to test relay operation.

Requested Torque Test

The Requested Torque Test lets you use the NGIS tool to manually control the engine torque to test for proper operation of the traction control system (TCS).

TCS Test

The TCS test lets you use the NGIS tool to control the pump motor in order to apply fluid pressure to the front wheel circuits.

Traction Control System (TCS)

Manual Control Tests

The TCS Manual Control Tests let you use the NGIS tool to perform motor tests and an adjuster assembly control test.You can confirm proper operation by com- paring what you command with the NGIS tool to what the ECU sees as a response and to what the actual out- put is at the component.

Voltage Load Test

The Voltage Load Test “loads” the ABS battery supply circuit to test for adequate battery capacity.

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OTC Wireless switch/hub Motor Rehome Test, Solenoid Tests, System Identification, Pump Motor Tests, Relay Test, TCS Test
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