Description of On-Board Diagnostics

DIAGNOSIS SYSTEM





1. DIAGNOSTIC SYSTEM
a. Inspect the battery voltage.
Standard voltage: 11 to 14 V
If voltage is below 11 V, recharge or replace the battery before proceeding.





b. Check the DLC3.
The vehicle's skid control ECU uses ISO 9141-2 for communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 9141-2 format.
Verify conditions listed in the table below:

HINT: If the intelligent tester displays "UNABLE TO CONNECT TO VEHICLE" when the cable of the intelligent tester is properly connected to the DLC3, the ignition switch is turned to the ON position and the tester is operated, there is a problem on either the vehicle side or tester side.
^ If communication is normal when the tester is connected to another vehicle, inspect the DLC3 on the original vehicle.
^ If communication is still not possible when the tool is connected to another vehicle, the problem is probably in the tester itself. In this case, consult the Service Department listed in the tester's instruction manual.

2. CHECK WARNING LIGHT
a. Turn the ignition switch to the LOCK position.





b. When the ignition switch is turned to the ON position, the light should come on for 3 to 4 seconds and then go off.

HINT: If the tire pressure warning light has a defect, check the tire pressure warning light output patterns and the problem symptoms table.





3. TIRE PRESSURE WARNING LIGHT CHART

HINT: When the skid control ECU does not operate properly, the ABS warning light comes on to indicate an ABS system malfunction.

Light output pattern 1:

a. Light output pattern 1

Light output pattern 2:

b. Light output pattern 2

Light output pattern 3:

c. Light output pattern 3

HINT: (When the skid control ECU detects a system abnormal 2 malfunction, check the ABS DTCs and proceed to the ABS diagnostics.

Light output pattern 4:

d. Light output pattern 4

Light output pattern 5:

e. Light output pattern 5

Light output pattern 6:

f. Light output pattern 6

Light output pattern 7:

g. Light output pattern 7

Light output pattern 8:

h. Light output pattern 8