DTC b1424
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
Diagnostic 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+) circuit. If the voltage at the TDM is between 6 and 9 volts, and the voltage being reported by the serial data message is greater than 9 volts, DTC B1424 will set.
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 volts. |
| • | Reported 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
Security Indicator turns ON.
Conditions for Clearing the DTC
| • | A current DTC clears when the battery voltage at the TDM is greater than 9 volts, or if the reported voltage by serial data is less than 9 volts. |
| • | A history DTC clears after 100 ignition cycles, if no failures are reported by the 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
Component Connector End Views
Description and Operation
Immobilizer Description and Operation
Electrical Information Reference (Except Opel Gt)
| • | Testing for Intermittent Conditions and Poor Connections |
Scan Tool Reference
Control Module References for scan tool information
Circuit/system Verification
- Engine running measure and record the voltage at the battery terminals.Verify that the battery voltage is 12.6-15.5 volts.
Circuit/system Testing
- 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 ohms 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.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for TDM replacement, set up, and programming.
