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.