Checking the signal cable

WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Ignition ON

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Fig 2: Identifying Connector

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Air conditioning (A/C) pressure sensor connector disconnected
Ignition on.
Connect a voltmeter between connector terminal 2 for the air conditioning (A/C) pressure sensor (control module side) and ground.

Fig 3: Identifying Knock Sensor (KS) 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 connector terminal 2 for the air conditioning (A/C) pressure sensor (control module side) and engine control module (ECM) terminal #14. Check for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Remedy as necessary.

Fig 1: Identifying Knock Sensor (KS) Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Voltage Display

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Fig 3: Identifying EMS2000

Courtesy of VOLVO CARS OF NORTH AMERICA.

Continue
Refer to Verification