DTC P0703
Diagnostic Instructions
DTC Descriptor
| DTC P0703: Brake Switch Circuit 2 |
Circuit/System Description
The body control module (BCM) monitors the brake pedal position
sensor. When the brake pedal is applied, the BCM detects a
predetermined voltage signal. The BCM sends a serial data message
to the engine control module (ECM) indicating the status of the
stop lamps.
Conditions for Running the DTC
The engine is ON.
Conditions for Setting the DTC
| • |
The ECM receives an invalid
brake pedal status serial data message from the BCM. |
| • |
This diagnostic runs
continuously. |
Action Taken When the DTC Sets
| • |
The malfunction indicator lamp
(MIL) will not illuminate. |
| • |
The cruise control system is
disabled. |
Conditions for Clearing the DTC
| • |
The condition responsible for
setting the DTC no longer exists. |
| • |
A history DTC will clear after
40 malfunction-free ignition cycles have occurred. |
Reference Information
Schematic Reference
Cruise Control Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Cruise Control Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
| 1. |
Verify that DTC P0572 or P0573
is not set. |
| 2. |
Verify that DTC P0703 is not
set. |
| ⇒ |
If DTC is set, replace the K9 Body Control Module.
Clear the DTC and road test the vehicle. If DTC resets, replace the
K20 Engine Control Module. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
Control Module References for control module replacement, setup
and programming
|
