Diagnosis System

THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILIZER SYSTEM: DIAGNOSIS SYSTEM

1. DESCRIPTION

(a) The ID code box (immobilizer code ECU) and ECM control the vehicle engine immobilizer system functions. Engine immobilizer system data and Diagnostic Trouble Codes (DTCs) can be read through the vehicle Data Link Connector 3 (DLC3). In some cases, a malfunction may be occurring in the engine immobilizer system even though the security indicator light is not illuminated.

When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs.

2. CHECK DLC3

(a) Check the DLC3 General Information.

3. INSPECT BATTERY VOLTAGE

(a) Measure the battery voltage.

Standard Voltage:

11 to 14 V

(a) If the voltage is below 11 V, recharge or replace the battery.