B1287 - Amplifier Control Signal Circuit

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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B1287 Possible Causes

  • Faulty Amplifier
  • Amplifier harness is open or shorted
  • Amplifier circuit poor electrical connection
  • Faulty Radio Unit

First diagnose B1287 code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.

B1287 Tech Notes

DTC B1287 01 Amplifier Control Signal Circuit Short to Battery
DTC B1287 02 Amplifier Control Signal Circuit Short to Ground
DTC B1287 04 Amplifier Control Signal Circuit Open

Cost of diagnosing the B1287 code

    Labor: 1.0

    The cost of diagnosing the B1287 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

B1287 Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B1287 Description

The radio provides a remote amplifier mute output circuit to control overall muting of the remote amplifier. The amplifier receives Pulse Width Modulated (PWM) signals on the control circuit at varying duty cycle percentages for controlling muted and unmuted functions of the amplifier. Circuitry internal to the radio monitors the remote amplifier mute circuit for faults and sets the appropriate Diagnostic Trouble Code (DTC) when faults are detected.
OBDII Code B1287 - Amplifier Control Signal Circuit - AutoCodes.com

B1287 More Information

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B1287 Information for specific makes

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B1287 Comments

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