S80 T6 L6-2.9L Turbo VIN 91 B6294T (2002)
Backup Lamp Switch: Testing and Inspection
Checking Reverse Light Contact
Open Circuit/Short Circuit to Voltage Supply
Checking reverse light contact
Checking wire and replacement of component
Check the wire between the control unit 1A and reverse light contact 2 (3/10) for a short-circuit to voltage supply as described in Checking wiring and
terminals. Permanent fault See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Diagnostic Trouble Code Tests and
Associated Procedures/Related Tests, Information and Procedures/Checking Wiring and Terminals. Permanent Fault , and for an open circuit as
described in Checking wiring and terminals. Permanent fault See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Diagnostic Trouble Code Tests and Associated Procedures/Related Tests, Information and Procedures/Checking Wiring and Terminals.
Permanent Fault.
Also check the connectors for a short circuit to voltage supply, as described in Checking wiring and terminals. Permanent fault See: Powertrain
Management/Computers and Control Systems/Testing and Inspection/Diagnostic Trouble Code Tests and Associated Procedures/Related Tests,
Information and Procedures/Checking Wiring and Terminals. Permanent Fault , and for an open circuit as described in Checking wiring and terminals.
Permanent fault See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Diagnostic Trouble Code Tests and Associated
Procedures/Related Tests, Information and Procedures/Checking Wiring and Terminals. Permanent Fault.
If no fault is found on the wire, check the function of the reversing lamp switch.
Hint: If reverse light contact is closed, the voltage between 1 and 2 on the contact is 0 V.
Do the necessary corrective action.
Additional information
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To access/replace the central electronic module (CEM), see Central electronic module (CEM), replacing See: Body and Frame/Body Control
Systems/Body Control Module/Service and Repair/Central Electronic Module (CEM), Replacing.
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For information on signals and additional values, see Signal specification See: Body and Frame/Body Control Systems/Testing and
Inspection/Pinout Values and Diagnostic Parameters/Signal Specification.
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To connect the test box, see Connecting the breakout box See: Body and Frame/Body Control Systems/Testing and Inspection/Pinout Values and
Diagnostic Parameters/Connecting the Breakout Box/Connecting the Breakout Box, Central Electronic Module (CEM).
