DA91 - Check EEC-IV Vehicle Harness

- Still in Key On Engine Off Continuous Monitor Test Mode.

- Observe Digital Volt/Ohm Meter (DVOM) or STAR LED for fault indication while performing the following:

Sensor Wiring Schematic:

- Grasp the vehicle harness close to the sensor connector. Wiggle, shake or bend a small section of the Electronic Engine Controls (EEC) system vehicle harness while working your way to the dash panel. Also wiggle, shake or bend the EEC system vehicle harness from the dash panel to the Powertrain Control Module (PCM).

- Is a fault indicated?

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

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

No -- Go to DA92. DA92 - Check PCM and Vehicle Harness Connectors