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 B1424 00: Device Voltage Low - Theft Deterrent Module 12VDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
12V B+ | B1424 00 | B1424 00 | -- | -- |
Ground | -- | B1424 00 | -- | -- |
Circuit/System Description
The theft deterrent module (TDM) monitors the 12V battery positive (B+) voltage available to it. If the voltage at the TDM is between 6-9 volts, and the voltage being reported by a serial data message is greater than 9 volts, then DTC B1424 00 sets.
Conditions for Running the DTC
| • | The ignition switch is in Accessory or Run. |
| • | This diagnostic runs every 100 milliseconds. |
Conditions for Setting the DTC
| • | Voltage at the TDM 12V B+ circuit is between 6-9 volts. |
| • | Reported 12V battery voltage received via serial data is valid and is greater than 9 volts. |
| • | The above conditions have been met for 2 seconds. |
Action Taken When the DTC Sets
| • | The security indicator turns ON. |
| • | The driver information center (DIC) displays the SERVICE THEFT DETERRENT SYSTEM message. |
Conditions for Clearing the DTC
| • | A current DTC clears when the 12V B+ at the TDM is greater than 9 volts, or if the voltage reported by serial data is less than 9 volts. |
| • | A history DTC clears after 100 consecutive ignition cycles, if no failures are reported by this diagnostic. |
Diagnostic Aids
| • | A low voltage DTC in multiple modules indicates a concern in the 12V charging system. |
| • | Verify that the ground terminal G201 is clean and tight. |
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
- Engine running, accessories OFF, measure and record the battery voltage at the 12V battery terminals. The voltage should be between 12.6 and 15.0 volts.
- Ignition OFF, disconnect the harness connector at the TDM. Refer to Theft Deterrent Module Replacement.
- Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms between the ground circuit terminal 3 and ground.
- Verify that a test lamp illuminates between the 12V B+ circuit terminal 1 and ground.
- If all circuits test normal, replace the TDM.
| ⇒ | If not within the specified range, refer to Charging System Test. |
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If the test lamp does not illuminate, test the 12V B+ circuit for a short to ground or an open/high resistance. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for TDM replacement, set up, and programming.
