How To Proceed With Troubleshooting

WARNING: This page is about a different car, the 2008 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Use these procedures to troubleshoot the dynamic laser cruise control system.
The Techstream should be used at steps 3, 4, 5, and 9.

VEHICLE BROUGHT TO WORKSHOP
INSPECT BATTERY VOLTAGE
Standard:

11 to 14 V

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

CHECK COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)

Use the Techstream to check if the Multiplex Communication System (MPX) is functioning normally.

Result

RESULT REFERENCE

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

B: Go to MULTIPLEX COMMUNICATION SYSTEM

A: Go to next step

CHECK COMMUNICATION FUNCTION OF CONTROLLER AREA NETWORK (CAN)

Use the Techstream to check for normal function of CAN communication system.

Perform bus check (communication malfunction DTC).

Perform bus check (communication bus check).

Result

RESULT REFERENCE

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

B: Go to CAN COMMUNICATION SYSTEM

A: Go to next step

CHECK FOR DTC

Refer to the DTC CHECK / CLEAR .

Check for DTC and note any codes that are output.
Delete the DTC.

Recheck for DTC. Try to prompt the DTC by simulating the original activity that the DTC suggests.

Result

RESULT REFERENCE

Result	Proceed to
DTC does not reoccur	A
DTC reoccurs	B

B: Go to step 8

A: Go to next step

PROBLEM SYMPTOMS TABLE

Refer to the PROBLEM SYMPTOMS TABLE .

Result

RESULT REFERENCE

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

B: Go to step 8

A: Go to next step

OVERALL ANALYSIS AND TROUBLESHOOTING
1. Terminal of ECU (See TERMINALS OF ECU ).
2. Data List/Active Test (See DATA LIST / ACTIVE TEST ).
NEXT: Go to next step
REPAIR OR REPLACE
CONFIRMATION TEST
NEXT : END