B0560

DTC B0560

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC B0560 08
- Engine RPM Input Circuit Signal Invalid

Circuit/System Description

The amplifier receives a discrete pulse-width modulated engine speed signal from the engine control module. The amplifier uses the engine RPM signal for operating active noise cancellation.

Conditions for Running the DTC

* Engine running, Radio ON

* Battery voltage between 9-16 volts.

Conditions for Setting the DTC

* The amplifier receives a serial data message that the engine is running.

* The discrete engine speed signal to the amplifier indicates the engine speed is less than 300 RPM or greater than 9000 RPM.

Action Taken When the DTC Sets

The active noise cancellation system is disabled.

Conditions for Clearing the DTC

* A current DTC clears when a valid engine speed signal between 300-9000 RPM is received.

* A history DTC clears when the ignition cycle counter reaches the reset threshold without a repeat of the malfunction.

Reference Information

Schematic Reference

Active Noise Cancellation Schematics Active Noise Cancellation Schematics

Connector End View Reference

Component Connector End Views Fuel Pump and Level Sensor Assembly

Description and Operation

Active Noise Cancellation Description and Operation Active Noise Cancellation

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Testing

Note: Diagnose any engine control module DTCs before performing this diagnostic.

1. Ignition OFF, disconnect the X3 harness connector at the T3 audio amplifier.

2. Engine running at 600 RPM,

3. Test for 575-625 Hz AC between the signal circuit terminal 2 and ground.

• If not between 575-625 Hz AC

1. Ignition OFF, disconnect the X2 harness connector at the K20 engine control module. Ignition ON.

2. Test for less than 1 V between the signal circuit and ground.

• If 1 V or greater, repair the short to voltage on the circuit.

• If less than 1 V

3. Ignition OFF.

4. Test for infinite resistance between the signal circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance

5. Test for less than 2 ohms in the signal circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, replace the K20 engine control module.

• If between 575-625 Hz AC

4. Test or replace the T3 audio amplifier.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

Control Module References Control Module References for amplifier or engine control module replacement, programming, and setup.