Signal too high. Permanent fault: Verification: Verification

WARNING: This page is about a different car, the 2002 Volvo C70, 2001 Volvo C70, 2000 Volvo C70, 1999 Volvo C70, and 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.

HINT: After carrying out the repair, check that the fault has been remedied as follows:

Fig 1: Identifying Ignition Switch ON Position

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Connector(s) Reinstallation

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Fig 3: Identifying Control Unit

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Ignition off.
Ensure that fuel tank pressure sensor, air conditioning (A/C) pressure sensor, accelerometer and engine control module (ECM) are connected.
Connectors 24/2 and 24/4 connected.
Ignition on.
Select Volvo Scan Tool (ST) to erase diagnostic trouble codes (DTCs).

Fig 4: Identifying Scan Tool
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Continue
Refer to Verification, continued

NOTE:

After carrying out the repair, check that the fault has been remedied as follows:

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off.
Ensure that fuel tank pressure sensor, air conditioning (A/C) pressure sensor, accelerometer and engine control module (ECM) are connected.
Connectors 24/2 and 24/4 are connected.
Start the engine and idle it.
If EFI-621 is stored it should have intermittent status.

Fig 2: Identifying Scan Tool
Courtesy of VOLVO CARS OF NORTH AMERICA.

Does EFI-621 have intermittent status?

YES
VERIFIED: Troubleshooting has been completed.
NO
Refer to Information