XC90 L5-2.5L Turbo VIN 59 B5254T2 (2004)
Backup Lamp Switch: Testing and Inspection
Checking Reverse Light Contact
Reverse Light Remains On
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: Accessories and Optional Equipment/Cellular Phone/Testing and Inspection/Component Tests and General
Diagnostics/Checking Wiring and Terminals. Permanent Fault , and for an open circuit as described in Checking wiring and terminals. Permanent fault
See: Accessories and Optional Equipment/Cellular Phone/Testing and Inspection/Component Tests and General Diagnostics/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: Accessories and
Optional Equipment/Cellular Phone/Testing and Inspection/Component Tests and General Diagnostics/Checking Wiring and Terminals. Permanent Fault
, and for an open circuit as described in Checking wiring and terminals. Permanent fault See: Accessories and Optional Equipment/Cellular
Phone/Testing and Inspection/Component Tests and General Diagnostics/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.
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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).
