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 1 Voltage LowDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
B+ | B1424 00 | B1424 00 | -- | -- |
Ground | -- | B1424 00 | -- | -- |
Circuit/System Description
The theft deterrent module (TDM) monitors the battery positive (B+) voltage available to it. If the voltage at the TDM is between 6-9 V, and the voltage being reported by a serial data message is greater than 9 V, then DTC B1424 00 sets.
Conditions for Running the DTC
| • | The Ignition is in Accessory or Run |
| • | The diagnostic runs every 100 milliseconds. |
Conditions for Setting the DTC
| • | Voltage at the B+ circuit is between 6 and 9 V. |
| • | Reported battery voltage received via serial data is valid and is greater than 9 V. |
| • | The above conditions have been met for 2 seconds. |
Action Taken When the DTC Sets
| • | Security Indicator turns ON. |
| • | The driver information center (DIC) displays the SERVICE THEFT DETERRENT SYSTEM message. |
Conditions for Clearing the DTC
| • | This DTC passes when the battery voltage at the TDM is greater than 9 V, or if the voltage reported by serial data is less than 9 V. |
| • | 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 charging system.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Immobilizer 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 battery terminals.The voltage should be between 12.6 and 15.0 V.
- Ignition OFF, disconnect the harness connector at the theft deterrent module (TDM).
- Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 Ω between the ground circuit terminal 3 and ground.
- Ignition ON , verify a test lamp illuminates between the B+ circuit terminal 1 and ground.
- If the circuits test normal, replace the TDM.
| ⇒ | If the battery voltage is 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 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
