For 1990-2009 cars only
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 C0914 03: Device Voltage Reference Output 1 Circuit Voltage Below ThresholdDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Battery Voltage Signal | C0914 | C0914 | -- | -- |
Circuit/System Description
The adaptive cruise module (ACM) monitors the system voltage to ensure that the voltage stays within the proper range. Damage to components, and incorrect data may occur when the voltage is out of range.
Conditions for Running the DTC
| • | The vehicle speed is above 8 km/h (5 mph). |
| • | The system voltage is between 9.0-18 volts. |
Conditions for Setting the DTC
The ACM detects a system voltage below 8.5 volts for 1 second.
Action Taken When the DTC Sets
| • | The ACM will command the RADAR NOT READY warning message to be illuminated on the driver information center (DIC). |
| • | The Cruise Control will be disabled. |
Conditions for Clearing the DTC
| • | The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction. |
| • | Using the scan tool Clear DTC Information function can clear the DTC. |
| • | The System Voltage is greater than 9.0 volts. |
Reference Information
Schematic Reference
Connector End View Reference
Cruise Control Connector End Views
Electrical Information Reference
Circuit/System Testing
- Disconnect the ACM and measure and record the voltage of the battery supply voltage circuit and the ground circuit of the ACM then measure the voltage across battery terminals and compare it with the first reading. Verify that the battery and battery supply voltage circuit do not differ more than 0.8 volts.
- Go to Charging System Test .
| ⇒ | If more than 0.8 volts test the battery supply voltage, ground circuits of the ACM for high resistance or replace the ACM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for ACM replacement, setup, and programming
