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z The DTC will clear once the ignition cycle has occurred without the fault recurring. z The BCM history codes will clear once 100 concurrent ignition cycles occur without the fault recurring. z Using a scan tool. Diagnostic Aids z Use a scan tool in order to inspect the Passlock(tm) data voltage and the Passlock(tm) code. z Inspect the Passlock(tm) sensor harness for an intermittent or a short to ground. Refer to Testing for z Following a repair the tamper timer needs 10 minutes in order to expire. Test Description The numbers below refer to the step numbers on the diagnostic table. 3: Tests for proper operation of the circuit in the high voltage range. 4: Tests for a short to ground in the Passlock(tm) sensor signal circuit. DTC B2957 Step Action Value (s) Yes No Schematic Reference:Theft Deterrent System Schematics 1 Did you perform the Theft Deterrent (VTD) - Go to Step 2 Go to Diagnostic System Check - Theft Deterrent 2 1. Install a scan tool. 2. Momentarily rotate the ignition switch to CRANK. Do not start the vehicle. 3. Release the ignition switch to ON. 4. With a scan tool, observe the Passlock data voltage in the Body Control Does the scan tool indicate that the Passlock 0.4- 4.9 V Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 1. Turn OFF the ignition. 2. Disconnect the Passlock (tm) sensor connector. 3. Turn ON the ignition, with the engine OFF.
2004 Hummer H2 2004 ACCESSORIES & EQUIPMENT Theft Deterrent - Hummer H2
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