How To Proceed With Troubleshooting

HINT:

Use these procedures to troubleshoot the engine immobilizer system.

*: Use the Techstream.

VEHICLE BROUGHT TO WORKSHOP
NEXT: Go to next step
INSPECT BATTERY VOLTAGE
Standard voltage

11 to 14 V
- If the voltage is below 11 V, recharge or replace the battery before proceeding.
NEXT: Go to next step

CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*

Use the Techstream to check if the LIN communication system is functioning normally.

RESULT

Result	Proceed to
LIN DTC is not output	A
LIN DTC is output	B

B → GO TO LIN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING

A: Go to next step

CHECK FOR DTC*

Check for DTCs and make a note of any codes that are output. Refer to DTC CHECK / CLEAR .
Clear the DTCs. Refer to DTC CHECK / CLEAR .

Recheck for DTCs. Refer to DTC CHECK / CLEAR . Based on the DTCs output above, try to cause the output of the same SFI system, steering lock system or engine immobilizer system DTC by reproducing the symptoms indicated by the DTC.

RESULT

Result	Proceed to
DTC is not output	A
SFI system DTC is output	B
Steering lock system DTC is output	C
Engine immobilizer system DTC is output	D

B → Go to DIAGNOSTIC TROUBLE CODE CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART

C → Go to DIAGNOSTIC TROUBLE CODE CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART

D → Go to DIAGNOSTIC TROUBLE CODE CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART

A: Go to next step

PROBLEM SYMPTOMS TABLE

Refer to Problem Symptoms Table. Refer to PROBLEM SYMPTOMS TABLE .

RESULT

Result	Proceed to
Fault is not listed in problem symptoms table	A
Fault is listed in problem symptoms table	B

B → Go to step 7

A: Go to next step

OVERALL ANALYSIS AND TROUBLESHOOTING*
1. Data List / Active Test. Refer to DATA LIST / ACTIVE TEST .
2. Terminals of ECU. Refer to TERMINALS OF ECU .
  NEXT: Go to next step
ADJUST, REPAIR OR REPLACE
NEXT: Go to next step
CONFIRMATION TEST
NEXT → END