Abs Quick Check Chart
- Turn ignition off. Disconnect control module 40-pin connector. 4WABS control module is located on radiator support, right of battery tray. Connect Breakout Box (49-UN01-058), overlay, ABS Adapter (49-UN01-062) and ABS Harness Adapter (49-UN01-063) to control module harness connector.
- Ensure resistance exists between breakout box pin No. 1 and ground, or invalid results may occur. See Fig 1 . Incorrect results indicate wiring or component failure. See CIRCUIT TESTS for complete diagnostic procedures before replacing component.
- When testing wheel speed sensor output, measure frequency and voltage. Result of voltage divided by frequency will not change with wheel speed. Take both measurements at same wheel speed.