How To Proceed With Troubleshooting

HINT:

Use these procedures to troubleshoot the cruise control system.
*: Use the intelligent tester.

VEHICLE BROUGHT TO WORKSHOP
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PROBLEM SYMPTOM CONFIRMATION
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CHECK MULTIPLEX COMMUNICATION SYSTEM*

Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

Check for output DTCs.

Result

PROBLEM SYMPTOM CHART

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

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.

B : PROCEED TO "MULTIPLEX COMMUNICATION SYSTEM"

A : GO TO NEXT STEP

CHECK CAN COMMUNICATION SYSTEM*

Refer to PRECAUTION .

Check for output DTCs.

Result

PROBLEM SYMPTOM CHART

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

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.

B : PROCEED TO "CAN COMMUNICATION SYSTEM"

A : GO TO NEXT STEP

DTC CHECK AND CLEAR*
Refer to DTC CHECK / CLEAR .

NEXT

DTC CHECK (OTHER THAN MPX AND CAN SYSTEM DTC)*

Refer to DTC CHECK / CLEAR .

Result

PROBLEM SYMPTOM CHART

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

A : GO TO STEP 8

B : GO TO NEXT STEP

DTC CHART
Refer to DIAGNOSTIC TROUBLE CODE CHART .

NEXT

GO TO STEP 11

PROBLEM SYMPTOM SIMULATION

Result

PROBLEM SYMPTOM 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 10

A : GO TO NEXT STEP

SYMPTOM SIMULATION
Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE .

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PROBLEM SYMPTOMS TABLE
Refer to PROBLEM SYMPTOMS TABLE .

NEXT
CIRCUIT INSPECTION
Refer to P0500 .

Refer to TC AND CG TERMINAL CIRCUIT .

NEXT
TERMINALS OF ECU
Refer to TERMINALS OF ECU .

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IDENTIFICATION OF PROBLEM
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REPAIR OR REPLACE
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CONFIRMATION TEST
NEXT

END