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-> Yes An intermittent fault may be present in the wiring harness. Visually check for chaffed wires or other physical damage to the harness. If no fault is found in the circuit, suspect the following component(s): - A/C pressure sensor connector - A/C pressure sensor - ECM connector - ECM
-> No REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. Clear any DTCs, test the system for normal operation. G549822t256 : CHECK FOR POWER TO THE A/C PRESSURE SENSOR 1. Key on, engine off. 2. Measure the voltage between: EC101, harness side Battery
Pin 03
Negative terminal
Is the voltage between 4.8 - 5.2 volts? -> Yes GO to Pinpoint Test G549822t252.
-> No REPAIR the power supply circuit as necessary. For additional information, refer to the wiring diagrams. Clear any DTCs, test the system for normal operation. G549822t252 : CHECK THE A/C PRESSURE SENSOR SIGNAL CIRCUIT FOR 1. Measure the resistance between: EC101, harness side Battery
Pin 02
Negative terminal
Is the resistance greater than 100 Kohms? -> Yes GO to Pinpoint Test G549822t251.
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