Checking the signal cable

Fig 1: Identifying Ignition OFF

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Fig 2: Identifying Connector

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• Ignition off
• Atmospheric pressure sensor connector disconnected.

  Connect an ohmmeter between atmospheric pressure sensor connector terminal 3 (control module side) and the ground terminal.

  Fig 3: Identifying Atmospheric Pressure Sensor Connector Terminals

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  Fig 4: Identifying Ohmmeter

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The ohmmeter should read approximately 59 kΩ. 

• OK 

  Refer to Checking the ground lead 

• NOT OK 

  Refer to Checking the signal cable 

Check the cable between atmospheric pressure sensor connector terminal 3 (control module side) and engine control module (ECM) terminal 18 for a short-circuit to ground according to Short-circuit to ground, permanent faults .

Remedy as necessary.

Fig 1: Identifying Atmospheric Pressure Sensor Connector Terminals

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Fig 2: Identifying Ohmmeter

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Fig 3: Identifying EMS2000

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• Continue 

  Refer to Verification