DTC B1529
Diagnostic Instructions
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
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
12V Reference
|
B1529 03, B1405 03
|
1
|
B1529 07
|
B1529 07
|
Steering Wheel Control Switch Signal
|
1
|
1
|
B3622 07
|
-
|
1. Steering Wheel Controls Inoperative
|
|
| |
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. |
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
Connector End View Reference
Component Connector End Views
Description and Operation
Steering Wheel Controls Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
| 1. |
Ignition OFF, disconnect the
S70R Steering Wheel Controls Switch - Right. |
| 2. |
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. |
| 3. |
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. |
| 4. |
Ignition OFF, disconnect the
X3 harness connector at the K9 Body Control Module. |
| 5. |
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. |
| 6. |
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
|
