Checking Component And Wiring
Check air conditioning (A/C) pressure sensor connector for contact resistance and oxidation according to CONTACT RESISTANCE AND OXIDATION .
Check signal cable between engine control module (ECM) #A68 (#B8) and air conditioning (A/C) pressure sensor #2 for an short-circuit to ground according to SHORT-CIRCUIT TO GROUND, PERMANENT FAULTS .
Check signal cable between engine control module (ECM) #A68 (#B8) and air conditioning (A/C) pressure sensor #2 for an open circuit according to OPEN-CIRCUIT, PERMANENT FAULTS .
Check power supply cable between engine control module (ECM) #A39 (#A39) and air conditioning (A/C) pressure sensor #3 for an open-circuit according to OPEN-CIRCUIT, PERMANENT FAULTS .
Remedy as necessary.
Other information:
- Connecting the breakout box/accessing the control module, see CONNECTING THE BREAKOUT BOX .
- Air conditioning (A/C) pressure sensor #2 is the signal cable, #3 is the power supply (5 V) and #1 is the signal ground.
- For 5 cylinder turbocharged engines -2004, see SIGNAL DESCRIPTION
- For 6 cylinder engines -2004, see SIGNAL SPECIFICATION
- Continue
Refer to VERIFICATION