Mode F4 (ABS Test)

Mode is used to perform following tests.

• SOLENOID VALVE PRESSURE HOLD TEST
• SOLENOID VALVE PRESSURE RELEASE TEST
• AUTOMATIC TESTS

By selecting appropriate test and observing results, error conditions and faults can be further identified.

Fig 1: Tech 1 Code History Mode

Courtesy of GENERAL MOTORS CORP.

Fig 2: Tech 1 Trouble Codes Mode

Courtesy of GENERAL MOTORS CORP.