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2011
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Acadia SL, AWD
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Repair and Diagnosis (Single Page)
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Diagnostic Information and Procedures
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DTC B257A
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Diagnostic Fault Information
Diagnostic Fault Information
Circuit
Short to Ground
Open/High Resistance
Short to Voltage
Signal Performance
Headlamp Switch Off Signal
B257A 00
3
1
-
Headlamp Switch On Signal
B257A 00
2
1
-
Headlamp Ground
-
2, 3
-
-
1. Headlamps Always ON
2. Headlamps Inoperative From Switch
3. Unable To Turn OFF Automatic Headlamps