HB23 - Check Continuous Monitor Diagnostic Test Mode (DTM)

- Key "OFF".

- Verify engine at operating temperature.

- Start engine and run at 2000 rpm for two minutes.

- With engine rpm at idle, enter Engine Running Continuous Monitor test mode. Continuous Monitor Diagnostic Test Mode (Wiggle Test)

- Observe Analog Volt/Ohm Meter (VOM) or STAR LED/beeper for indication of fault.

- Wiggle, shake or bend a small section of the Electronic Engine Controls (EEC) harness while working from the Heated Oxygen Sensor (HO2S) to the Powertrain Control Module (PCM).

- Wiggle, shake or bend a small section of the EEC harness while working from the HO2S GND to the PCM.

- Is a fault indicated?

Yes -- Isolate fault and service as necessary. Remove breakout box. Clear continuous memory. Clearing Diagnostic Trouble Codes

Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)

No -- Remain in Engine Running Continuous Monitor test mode. Go to HB24. HB24 - Continuous Monitor DTM Test Drive Check