PRE-RELEASE
DTC P0703
| DTC P0703 |
| Diagnostic Instructions |
| • |
Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| 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 |
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The ECM receives an invalid brake pedal status serial data message from the BCM.
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This diagnostic runs continuously.
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| Action Taken When the DTC Sets |
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The malfunction indicator lamp (MIL) will not illuminate.
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The cruise control system is disabled.
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| Conditions for Clearing the DTC |
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The condition responsible for setting the DTC no longer exists.
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A history DTC will clear after 40 malfunction-free ignition cycles have occurred.
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| 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
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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Scan Tool Reference
Control Module References for scan tool information
| Circuit/System Verification |
| 1. |
Verify that DTC P0572 or P0573 is not set.
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| 2. |
If DTC is set, refer to
Diagnostic System Check - Vehicle
.
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| 3. |
Verify that DTC P0703 is not set.
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| 4. |
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.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for control module replacement, setup and programming
