Checking the signal cable

Fig 1: Identifying Connector

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• Air conditioning (A/C) pressure sensor connector disconnected.

  Connect an ohmmeter between connector terminal 2 for the air conditioning (A/C) pressure sensor (control module side) and the ground terminal.

  Fig 2: Identifying Air Conditioning (A/C) Pressure Sensor Connector Terminals

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  Fig 3: Identifying Ohmmeter

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The ohmmeter should read 300-400 kΩ. 

• OK 

  Refer to Checking the ground lead 

• NOT OK 

  Refer to Checking the signal cable 

Check the cable between connector terminal 2 for the air conditioning (A/C) pressure sensor (control module side) and engine control module (ECM) terminal 14 for a short-circuit to ground according to Short-circuit to ground, permanent faults .

Remedy as necessary.

Fig 1: Identifying EMS2000

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Fig 2: Identifying Ohmmeter

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Fig 3: Identifying Air Conditioning (A/C) Pressure Sensor Connector Terminals

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• Continue 

  Refer to Verification