Checking the power cable

Fig 1: Identifying Ignition ON

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Fig 2: Identifying Connector

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• Ignition on
• Atmospheric pressure sensor connector disconnected.

  Connect a voltmeter between atmospheric pressure sensor connector terminal 1 (control module side) and the ground terminal.

  Fig 3: Identifying Atmospheric Pressure Sensor Connector Terminals

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  Fig 4: Identifying Voltage Display

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The voltmeter should read approximately 5 V. 

• OK 

  Refer to Checking the signal cable 

• NOT OK 

  Refer to Checking the power cable 

Check the cable between atmospheric pressure sensor connector terminal 1 (control module side) and engine control module (ECM) terminal 78 for an open-circuit according to Open-circuit, 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