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 Pass Key 3 module 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
Module battery voltage between low voltage limits 6-9 volts for a minimum of 2 seconds and serial data voltage is greater than normal low voltage 9 volts.
Action Taken When the DTC Sets
Security telltale ON.
Conditions for Clearing the DTC
Module battery voltage is greater than normal voltage low limit 9 volts.
Reference Information
Schematic Reference
Connector End View Reference
Immobilizer Connector End Views
Electrical Information Reference
Scan Tool Reference
Circuit/System Testing
- Ignition OFF, disconnect the theft deterrent module (TDM) harness connector.
- Measure and record the voltage at the battery terminals. Ignition in ON position, measure the voltage between the accessory voltage circuit and the ground circuit of the TDM. 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 of the TDM 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, setup, and programming
