• | 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. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
B+ | B1424 00 |
B1424 00 | -- | -- |
Ground | -- | B1424 00 | -- | -- |
The theft deterrent module (TDM) monitors the battery positive (B+) circuit. If the voltage at the TDM is between 6 and 9 V, and the voltage being reported by the serial data message is greater than 9 V, DTC B1424 will set.
• | The Ignition is in Accessory or RUN. |
• | The diagnostic runs every 100 milliseconds. |
• | 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. |
• | Security Indicator turns ON. |
• | The driver information center (DIC) displays the SERVICE THEFT DETERRENT SYSTEM message. |
• | A current DTC clears when the battery voltage at the TDM is greater than 9 V, or if the reported voltage by serial data is less than 9V. |
• | A history DTC clears after 100 ignition cycles, if no failures are reported by the diagnostic. |
Immobilizer Description and Operation
Control Module References for scan tool information
A low voltage DTC in multiple modules indicates a concern in the charging system.
⇒ | 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+ voltage circuit for a short to ground or an open/high resistance. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for TDM replacement, set up, and programming.
• | 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. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
B+ | B1424 00 |
B1424 00 | -- | -- |
Ground | -- | B1424 00 | -- | -- |
The Heater Coolant Heater Control Module (HCHCM) monitors the system voltage to ensure that the voltage stays within the proper range. Damage to components, and incorrect data may occur when the voltage is out of range.
• | The voltages supplied to the control module is between 9.5-18 V. |
• | The ignition is ON. |
• | The engine is running. |
HCHCM detects a system voltage below 10.2 V for 15 seconds.
The control module immediately disables all outputs when an out of range voltage condition has been detected.
The DTC clears when the system voltage returns to a normal range.
Air Temperature Description and Operation
Control Module References for scan tool information
A low voltage DTC in multiple modules indicates a concern in the charging system.
⇒ | 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+ voltage circuit for a short to ground or an open/high resistance. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.