How To Proceed With Troubleshooting

HINT:

Use these procedures to troubleshoot the cruise control system.
*: Use the intelligent tester (with CAN VIM).

VEHICLE BROUGHT TO WORKSHOP
INSPECT BATTERY VOLTAGE
Standard voltage:

11 to 14 V

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

INSPECT COMMUNICATION SYSTEM FUNCTION OF LARGE-SCALE MULTIPLEX (BEAN)"

Check for output DTCs.

HINT:

The ECM of this system is connected to the multiplex communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the multiplex communication system.

Result

RESULT REFERENCE CHART

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

B: PROCEED TO MULTIPLEX COMMUNICATION -- SC430

A: Go to next step

CHECK CAN COMMUNICATION SYSTEM*

Check for output DTCs.

HINT:

The ECM of this system is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN communication system.

RESULT REFERENCE CHART

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

B: PROCEED TO CAN COMMUNICATION -- SC430

A: Go to next step

CHECK FOR DTC (OTHER THAN MPX AND CAN SYSTEM)

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

Recheck for DTCs, and try to prompt the DTC by simulating the original activity that the DTC suggests.

Result

RESULT REFERENCE CHART

Result	Proceed to
DTC does not reoccur	A
DTC reoccurs	B

B: Go to step 9

A: Go to next step

PROBLEM SYMPTOMS TABLE

Result

RESULT REFERENCE CHART

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

B: Go to step 9

A: Go to next step

OVERALL ANALYSIS AND TROUBLESHOOTING*
1. See DATA LIST / ACTIVE TEST .
2. See TERMINALS OF ECM .
REPAIR OR REPLACE
CONFIRMATION TEST
NEXT: END