Checking wiring and connectors
Check control module and air conditioning (A/C) pressure sensor connector for contact resistance and oxidation according to Contact resistance and oxidation , and loose connections according to Loose connections (terminals) .
Check signal cable between engine control module (ECM) #A21 (#A21) and air conditioning (A/C) pressure sensor terminal 2 for an intermittent short-circuit to ground according to Open-circuit, intermittent faults , and an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults .
Check cable between control module #A58 (#A58) and air conditioning (A/C) pressure sensor terminal 3 for an intermittent open-circuit according to Open-circuit, intermittent faults .
Other information:
- To connect the breakout box, see Connecting the breakout box .
- To access/replace the control module, see Engine control module (ECM), replacing
- To access/replace air conditioning (A/C) pressure sensor, see Replacing pressure switch /Pressostat .
- For information about signals, see Signal specification .
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Refer to Information