Buick Encore: Secondary and Configurable Customer Controls - Diagnostic information and
procedures
DTC B1405: Control module voltage reference output 2
DIAGNOSTIC CODE INDEX
DTC B1405: CONTROL MODULE VOLTAGE REFERENCE OUTPUT 2
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.
- Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptor
DTC B1405 03
Control Module Voltage Reference Output 2 Circuit Low Voltage
DTC B1405 07
Control Module Voltage Reference Output 2 Circuit High Voltage
Diagnostic Fault Information
Circuit/System Description
The body control module (BCM) monitors the system voltage to make sure that
the voltage stays within the
proper range. Damage to components and/or incorrect operation can occur when the
voltage is out of range.
Conditions for Running the DTC
- Battery voltage is between 9-16 V.
- The ignition is ON.
Conditions for Setting the DTC
The BCM detects a low/high voltage on the control circuit.
Conditions for Clearing the DTC
- The condition responsible for setting the DTC no longer exists.
- A history DTC will clear once 100 consecutive malfunction free ignition
cycles have occurred.
Reference Information
Schematic Reference
Steering Wheel Secondary/Configurable Control Schematics (Encore),
Steering Wheel
Secondary/Configurable Control Schematics (Encore)
Connector End View Reference
WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS -
INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT
CONNECTOR END VIEWS - INDEX - Encore
Description and Operation
Steering Wheel Controls Description and Operation
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
Scan Tool Reference
Control Module References
Circuit/System Verification
Engine running, accessories OFF, measure and record the battery voltage at
the battery terminals. The voltage
should be between 12.6-15.0 V.
- If not within the specified range, refer to Charging System Test .
Circuit/System Testing
- Ignition OFF, disconnect the X2 and the X1 harness connector at the K9
Body Control Module.
- Test for less than 5 ohms between the X2 harness connector ground
circuit terminal 2 and ground.
- If greater than the specified range, test the ground circuit for an open/high
resistance.
- Test for less than 5 ohms between the X1 harness connector ground
circuit terminal 1 and ground.
- If greater than the specified range, test the ground circuit for an open/high
resistance.
- Ignition ON, test for more than 11 V between the X2 harness connector
terminal 1 and ground.
- If less than the specified value test the control circuit for an open/high
resistance.
- If all circuits test normal, replace the K9 Body Control Module.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic
procedure.
Control Module References for BCM replacement, setup, and programming
DTC B1529: Control module voltage reference output 5
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.
- Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptors
DTC B1529 03
Control Module Voltage Reference Output 5 Circuit Low Voltage
DTC B1529 07
Control Module Voltage Reference Output 5 Circuit High Voltage
Diagnostic Fault Information
Electrical DTCs
Circuit/System Description
The body control module (BCM) supplies voltage to the steering wheel control
switches and monitors the return
signal. Each switch state is associated to a set resistance value and when
pressed a specific voltage drop occurs
across the resistor unique to the switch. The BCM identifies the switch
selection and activates the feature.
Conditions for Running the DTC
- The system voltage is between 9-16 V.
- The ignition is ON.
Conditions for Setting the DTC
B1529 03
- The BCM detects a short to ground in the 12 V reference circuit.
- The above condition is present for greater than 30 s.
B1529 07
- The BCM detects a short to voltage in the 12 V reference circuit.
- The above condition is present for greater than 30 seconds.
Action Taken When the DTC Sets
The BCM will ignore switch inputs.
Conditions for Clearing the DTC
- The condition responsible for setting the DTC no longer exists.
- A history DTC will clear once 100 consecutive malfunction free ignition
cycles have occurred.
Reference Information
Schematic Reference
Steering Wheel Secondary/Configurable Control Schematics (Encore),
Steering Wheel
Secondary/Configurable Control Schematics (Encore)
Connector End View Reference
WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS -
INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT
CONNECTOR END VIEWS - INDEX - Encore
Description and Operation
Steering Wheel Controls Description and Operation
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
- Ignition OFF, disconnect the S70R Steering Wheel Controls Switch - Right.
- Ignition ON, test for greater than 11 V between the voltage reference
circuit terminal 1 and ground.
- If less than the specified value, test the voltage reference circuit for
a short to ground or an
open/high resistance. If the circuit tests normal, replace the K9 Body
Control Module.
- Test for greater than 11 V between the voltage reference circuit
terminal 1 and the signal circuit terminal
2.
- If less than the specified value, test the signal circuit for a short to
voltage or an open/high
resistance. If the circuit tests normal, replace the K9 Body Control Module.
- Ignition OFF, disconnect the X3 harness connector at the K9 Body Control
Module.
- Test for infinite resistance between the signal circuit terminal 2 at
the S70R Steering Wheel Controls
Switch - Right and ground.
- If less than the specified value, test the signal circuit for a short to
ground.
- If all circuits test normal, test or replace the S70R Steering Wheel
Controls Switch - Right.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic
procedure.
Control Module References for BCM replacement, setup, and programming
DTC B3622: Steering wheel controls signal circuit high voltage
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.
- Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptor
DTC B3622 07
Steering Wheel Controls Signal Circuit High Voltage
Diagnostic Fault Information
Circuit/System Description
The body control module (BCM) monitors the steering wheel control signal
circuit voltage. If the voltage level
is too high, damage may result in the system. When a high voltage condition is
detected, the BCM will ignore
the switch command.
Conditions for Running the DTC
- Battery voltage is between 9-16 V.
- The ignition is ON.
Conditions for Setting the DTC
The BCM detects a short to voltage in the steering wheel control switch
signal circuit.
Action Taken When the DTC Sets
The BCM will ignore switch inputs.
Conditions for Clearing the DTC
- The condition responsible for setting the DTC no longer exists.
- A history DTC will clear once 100 consecutive malfunction free ignition
cycles have occurred.
Reference Information
Schematic Reference
Steering Wheel Secondary/Configurable Control Schematics (Encore),
Steering Wheel
Secondary/Configurable Control Schematics (Encore)
Connector End View Reference
WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS -
INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT
CONNECTOR END VIEWS - INDEX - Encore
Description and Operation
Steering Wheel Controls Description and Operation
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
- Ignition OFF, disconnect the S70R Steering Wheel Controls Switch - Right.
- Ignition ON, test for greater than 11 V between the voltage reference
circuit terminal 1 and ground.
- If less than the specified value, test the voltage reference circuit for
a short to ground or an
open/high resistance. If the circuit tests normal, replace the K9 Body
Control Module.
- Test for greater than 11 V between the voltage reference circuit
terminal 1 and the signal circuit terminal
2.
- If less than the specified value, test the signal circuit for a short to
voltage or an open/high
resistance. If the circuit tests normal, replace the K9 Body Control Module.
- Ignition OFF, disconnect the X3 harness connector at the K9 Body Control
Module.
- Test for infinite resistance between the signal circuit terminal 2 at
the S70R Steering Wheel Controls
Switch - Right and ground.
- If less than the specified value, test the signal circuit for a short to
ground.
- If all circuits test normal, test or replace the S70R Steering Wheel
Controls Switch - Right.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic
procedure.
Control Module References for BCM replacement, setup, and programming
SYMPTOMS - SECONDARY AND CONFIGURABLE CUSTOMER CONTROLS
NOTE: The following
steps must be completed before using the symptom tables.
- Perform the Diagnostic System Check - Vehicle before using the symptom
tables in order to verify that
all of the following are true:
- There are no DTCs set.
- The control modules can communicate via the serial data link.
- Review the system description and operation in order to familiarize
yourself with the system functions.
Refer to Steering Wheel Controls Description and Operation.
Visual/Physical Inspection
- Inspect for aftermarket devices which could affect the operation of the
steering wheel controls. Refer to
Checking Aftermarket Accessories .
- Inspect the easily accessible or visible system components, for obvious
damage or conditions, which
could cause the symptom.
Intermittent
Faulty electrical connections or wiring may be the cause of intermittent
conditions. Refer to Testing for
Intermittent Conditions and Poor Connections .
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to
diagnose the symptom:
Refer to Steering Wheel Controls Malfunction in order to diagnose the symptom.
Steering wheel controls 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.
- Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
Diagnostic Fault Information
Circuit/System Description
The body control module (BCM) supplies voltage to the audio steering wheel
control switches and monitors the
return signal. Each switch state is associated to a set resistance value and
when pressed a specific voltage drop
occurs across the resistor unique to the switch. The BCM identifies the switch
selection and activates the
feature.
Reference Information
Schematic Reference
Steering Wheel Secondary/Configurable Control Schematics (Encore),
Steering Wheel
Secondary/Configurable Control Schematics (Encore)
Connector End View Reference
WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS -
INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT
CONNECTOR END VIEWS - INDEX - Encore
Description and Operation
Steering Wheel Controls Description and Operation
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Ignition ON.
- Verify the primary controls of the associated component are functioning
properly.
- If any of the primary controls do not function properly
Refer to Symptoms - Entertainment , Symptoms - Entertainment
- If all of the primary controls function properly
- Refer to Circuit/System Testing
Circuit/System Testing
- Ensure a battery charger is not connected to the battery.
- Ignition OFF and all vehicle systems OFF, disconnect the harness
connector at the S70R Steering Wheel
Controls Switch - Right, ignition ON.
- Test for 11-12.2 V between the reference voltage circuit terminal 1 and
ground.
- Ignition OFF, disconnect the harness connector at the K9 Body Control
Module.
- Test for infinite resistance between the reference voltage circuit and
ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- If infinite resistance
- Test for less than 2 ohms in the reference voltage circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms, replace the K9 Body Control Module.
- If greater than 12.2 V
- Ignition OFF, disconnect the harness connector at the K9 Body Control
Module, ignition ON.
- Test for less than 1 V between the reference voltage circuit and ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- If less than 1 V, replace the K9 Body Control Module.
- If between 11-12.2 V
- Test for 11-12.2 V between the reference voltage circuit terminal 1 and
signal circuit terminal 2.
If not between 11-12.2 V
- Ignition OFF, disconnect the harness connector at the K9 Body Control
Module.
- 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
- 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 K9 Body Control Module.
- If between 11-12.2 V
- Ignition OFF, disconnect the harness connector at the K9 Body Control
Module.
- 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, replace the S70R Steering Wheel Controls Switch
- Right.
Component Testing
- Ignition OFF, disconnect the harness connector at the S70R Steering
Wheel Controls Switch - Right.
- Test the resistance between the signal terminal 2 and the reference
voltage terminal 1 while pressing the
appropriate steering wheel controls switch button listed below:
- If not the specified value
Replace the S70R Steering Wheel Controls Switch - Right.
- All OK
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Control Module References for BCM replacement, programming and setup.
READ NEXT:
STEERING WHEEL CONTROLS DESCRIPTION AND OPERATION
Steering Wheel Controls Block Diagram
Fig. 3: Steering Wheel Controls Block Diagram
The steering wheel control switches duplicate the function of
SCHEMATIC WIRING DIAGRAMS
SPECIFICATIONS
FASTENER TIGHTENING SPECIFICATIONS
Fastener Tightening Specifications
SCHEMATIC WIRING DIAGRAMS
SUNROOF WIRING SCHEMATICS (ENCORE)
Power Sunroof
SUN
DTC B3664: Sunroof position select switch
DIAGNOSTIC CODE INDEX
DTC B3664: SUNROOF POSITION SELECT SWITCH
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using thi
SEE MORE:
Special Tools
CH-51450-NVH Oscilloscope Diagnostic Kit (w/NVH)
EL-38792-A Electronic Vibration Analyzer (EVA) 2
EL-38792-25 Inductive Pickup Timing Light
EL-47955 Multi Diagnostic Interface MDI
For equivalent regional tools, refer to Special Tools and Equipment.
Test Description
The numbers be
Factors such as maintenance,
temperatures, driving speeds,
vehicle loading, and road conditions
affect the wear rate of the tires.
Treadwear indicators are one way to
tell when it is time for new tires.
Treadwear indicators appear when
the tires have only 1.6mm (1/16 in)
or less of tread remainin