Using Scan Tool

Connect scan tool to Data Link Connector No. 3 (DLC3). See Figure. Turn ignition and scan tool on. Using scan tool manufacturer's instructions, check for Diagnostic Trouble Codes (DTCs) and freeze frame data.

If scan tool is able to connect and communicate with vehicle, go to next step. If scan tool displays UNABLE TO CONNECT TO VEHICLE, try scan tool on another vehicle. If scan tool still displays UNABLE TO CONNECT TO VEHICLE, check for defective scan tool. If scan tool operates correctly on another vehicle, check for proper voltage and resistance at DLC3. See DLC NO. 3 SPECIFICATIONS table. If voltage or resistance is not within specification, check wiring to DLC3. See WIRING DIAGRAMS .

DLC NO. 3 SPECIFICATIONS

Terminals No.

Condition

Specification

7 & 5 ⁽¹⁾

Communicating

Pulse Generation

4 & Body Ground ⁽²⁾

Constantly

One Ohm Or Less

5 & Body Ground ⁽³⁾

Constantly

One Ohm Or Less

16 & Body Ground ⁽⁴⁾

Constantly

9-14 Volts

⁽¹⁾	Terminal No. 7 is signal line and terminal No. 5 is signal ground on DLC3.

⁽²⁾	Terminal No. 4 goes from DLC3 to body ground.

⁽³⁾	Terminal No. 5 is signal ground on DLC3.

⁽⁴⁾	Terminal No. 16 is battery voltage on DLC3.

If any DTCs are retrieved, See ENGINE IMMOBILIZER DTC DEFINITIONS table for DTC definition and possible causes, then proceed to appropriate DTC test listed under DIAGNOSTIC TESTS . Once all repairs are performed, clear DTCs from Engine Control Module (ECM). See CLEARING CODES .