Diagnostic Aids
To locate an intermittent problem, use scan to command each of the four solenoids tied to the ODM circuit ON and OFF independently while monitoring:
- A/C RELAY CKT OPEN SHORT TO GND.
- A/C RELAY CKT SHORT TO VOLTS.
- TCC DUTY CYCLE OPEN SHORT TO GND.
- TCC DUTY CYCLE SHORT TO VOLTS.
- MODULE DRIVER OVERVOLT.
- MODULE DRIVER OVERTEMP.
If IGN 3 fuse is open, A/C RELAY CKT OPEN SHORT TO GND, EVAP VENT CKT OPEN SHORT TO GND and EVAP PURGE CKT OPEN SHORT TO GND parameters on scan tool will read YES.