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 Low - TDMDiagnostic 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 12 V battery voltage on the battery positive voltage circuit.
Conditions for Running the DTC
| • | The ignition is ON. |
| • | The reported battery voltage received via serial data is greater than 9 V. |
Conditions for Setting the DTC
The TDM detects that the battery voltage is 6-9 V.
Action Taken When the DTC Sets
The security indicator turns ON.
Conditions for Clearing the DTC
DTC B1424 will pass when the battery voltage is greater than 9 V.
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 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 Ω between the ground circuit terminal 3 and ground.
- Verify that a test lamp illuminates between the B+ circuit terminal 1 and ground.
- Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 2 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 B+ circuit for a short to ground or an open/high resistance. |
| ⇒ | If the test lamp does not illuminate, test the ignition 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.
