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Home >> Toyota >> 2012 >> Sienna XLE, AWD >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Pre-Collision System [Diagnostic Codes & Circuit Tests] >> Pre-Collision System >> DTC C1A4B: Stop Light Relay Circuit >> Inspection Procedure

Inspection Procedure

NOTE:

When this DTC is output, malfunction in the lighting system is suspected. Check if the lighting system is functioning normally. Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

HINT: 

This circuit uses CAN communication. Therefore, be sure to check that the CAN communication system is normal before performing inspection. Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

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