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: Device 1 Voltage LowCircuit/System Description
Voltage at theft deterrent module (TDM) is lower than the voltage being reported on the serial data line.
Conditions for Running the DTC
The ignition must be in Accessory or Run mode for this code to set.
Conditions for Setting the DTC
Voltage at the TDM B+ circuit is between 6-9 volts and the reported battery voltage received via serial data is greater than 9 volts.
Action Taken When the DTC Sets
Security Indicator ON.
Conditions for Clearing the DTC
Module battery voltage is greater than 9 volts.
Reference Information
Schematic Reference
Connector End View Reference
Immobilizer Connector End Views
Description and Operation
Immobilizer Description and Operation
Electrical Information Reference
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the TDM.
- Measure and record the voltage at the battery terminals. Ignition ON , measure the voltage between the accessory voltage circuit terminal 2 and the ground circuit terminal 3. Verify that the voltage readings do not differ more than 1 volt.
- Refer to Charging System Test .
| ⇒ | If greater than 1 volt, test the accessory voltage circuit and the ground circuit for an open/high resistance. 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
