Checking the signal cable

Fig 1: Identifying Ignition ON

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Fig 2: Disconnecting Connector

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• Ignition off
• Disconnect the connector for the atmospheric pressure sensor
• Ignition on.

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

  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 0 V. 

• 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 supply voltage according to Short-circuit to supply voltage. Permanent faults .

Remedy as necessary.

Fig 1: Identifying Atmospheric Pressure Sensor Connector Terminals

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Fig 2: Identifying Voltage Display

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Fig 3: Identifying EMS2000

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• Continue 

  Refer to Verification