Buick Regal 2018-2026 Service Manual / Accessories and Equipment / Mirrors / Diagnostic Information and Procedures
Buick Regal: Diagnostic Information and Procedures
- DTC B154A or B154B
- Symptoms - Mirrors
- Automatic Day-Night Mirrors Malfunction
- Power Mirror Malfunction (with A45)
- Power Mirror Malfunction (without A45)
- Power Mirror Tilt Inoperative in Reverse
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DTC B154A or B154B
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
Symptoms - Mirrors
NOTE: The following steps must be completed before using the symptom
tables.
1. Perform the Diagnostic System Check - Vehicle before using the Symptom
Tables in order to
verify that all of the follo
Automatic Day-Night Mirrors Malfunction
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach
Diagn
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OnStar Description and Operation (UE1 with IOB/IO6)
This OnStar system consists of the following components:
Telematics communication interface control module
OnStar three button assembly
Microphone
Cellular antenna
Navigation antenna
Bluetooth antenna (If equipped)
Back up battery (If equipped)
WiFi Hotspot (If equipped)
TTY (Teletyp
DTC C1201, P1000, P1001, P1003, P1008, P1009, P100A, P100E, P103D, P103E,
P10B6-P10B9, P10BF, P10C6-P10C8, P10F5, P1100, P1103, P117A, P11FF, P1200,
P128C-P128F, P129E, P12A8, P130F, P135C-P135F, P1
Diagnostic Instructions
Perform the Diagnostic System Check prior to using this diagnostic
procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis:Strategy Based
Diagnosis
An overview of each diagnostic category can be found here: Diagnostic
Procedu
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