How To Proceed With Troubleshooting [10/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus LS 500h. However, it is still accessible from the selected car via links, so may be relevant.

VEHICLE BROUGHT TO WORKSHOP
Result

Proceed to

NEXT

Result:

NEXT

See step 2

INSPECT AUXILIARY BATTERY VOLTAGE

Measure the auxiliary battery voltage with the power switch off.

Standard voltage

11 to 14 V

If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding.

Result

Proceed to
NEXT

Result:

See step 3

CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

Using the Techstream, check the CAN communication function to ensure that there are no malfunctions in the communication system.

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2023 - ]

Result

Proceed to
No DTCs output
DTCs output

Result:

DTCs output

GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2023 - ]

Result:

No DTCs output

See step 4

CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*

Using the Techstream, check the LIN communication function to ensure that there are no malfunctions in the communication system.

Result

Proceed to
No DTCs output
DTCs output

Result:

DTCs output

GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2023 - ]

Result:

No DTCs output

See step 5

OVERALL ANALYSIS AND TROUBLESHOOTING*

Data List / Active Test
Refer to DATA LIST / ACTIVE TEST [10/2023 - ]

Terminals of ECU

Refer to TERMINALS OF ECU [10/2023 - ]

Result

Proceed to
NEXT

Result:

See step 6

ADJUST, REPAIR OR REPLACE
Result

Proceed to

NEXT

Result:

NEXT

END