How To Proceed With Troubleshooting

HINT:

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

VEHICLE BROUGHT TO WORKSHOP
PROBLEM SYMPTOM CONFIRMATION

CHECK MULTIPLEX COMMUNICATION SYSTEM*

Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

Check for output DTCs.

Result

RESULT REFERENCE

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 the PRECAUTION .

Check for output DTCs.

Result

RESULT REFERENCE

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 the DTC CHECK / CLEAR .

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

Result

RESULT REFERENCE

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

A : GO TO STEP 8

B: Go to step

DTC CHART
Refer to the DIAGNOSTIC TROUBLE CODE CHART .
1. GO TO STEP 11

PROBLEM SYMPTOM CONFIRMATION

Result

RESULT REFERENCE

Result	Proceed to
Symptom occurs	A
Symptom does not occur	B

A : GO TO STEP 10

B: Go To Next Step

SYMPTOM SIMULATION
Refer to the ELECTRONIC CIRCUIT INSPECTION PROCEDURE .
1. Go to step 8
PROBLEM SYMPTOMS TABLE
Refer to the PROBLEM SYMPTOMS TABLE .
CIRCUIT INSPECTION
TERMINALS OF ECM
Refer to TERMINALS OF ECM .
IDENTIFICATION OF PROBLEM
REPAIR OR REPLACE
CONFIRMATION TEST

END