DTC B2973

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DTC B2973

B3E090201072W50

DTC B2973 | Running light relay circuit failure
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DETECTION CONDITION | Short to power supply or GND in PJB internal circuit between microcomputer and running light relay
POSSIBLE CAUSE | • Running light relay malfunction • PJB malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT DTC • Clear the DTC from the PJB memory using the WDS or equivalent. • Perform the self-test. (See PJB SELF-TEST.) • Is the same DTC present? | Yes | Go to the next step.
No | Troubleshooting completed.
2 | INSPECT RUNNING LIGHT RELAY • Inspect the running light relay. (See RELAY INSPECTION.) • Is there any malfunction? | Yes | Replace the running light relay, then go to the next step.
No | Go to the next step.

3

VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PJB memory using the WDS or equivalent.
• Perform the self-test.
(See PJB SELF-TEST.)
• Is the same DTC present?

Yes

Replace the PJB.
(See PASSENGER JUNCTION BOX (PJB) REMOVAL/INSTALLATION.)

No | Troubleshooting completed.