Toyota Corolla Cross: How To Proceed With Troubleshooting

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

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2.	CUSTOMER PROBLEM ANALYSIS

(a) Confirm problem symptoms

(1) Check the functions for which the problem symptoms occur. (Navigation function, audio function, etc.)

(2) If the malfunction occurs for radio, there is a high chance of the malfunction being caused by external factors.

HINT:

• If the malfunction occurs depending on the location, consider transmission lines, overhead wires, neon signs, trucks or motorcycles, wireless transmissions from vehicles, buildings, etc., as the cause.
• If the malfunction occurs depending on the channel (broadcast station), consider excessively strong radio waves, excessively weak radio waves, poor quality signal, unstable signal, etc., as the cause.
• If the malfunction occurs when playing a USB storage device, there is a high chance of the malfunction being caused by the media or media format. In this situation, check with the customer the conditions when the malfunction occurred in accordance with the interview sheet.

(3) If the malfunction occurs when playing a USB storage device, there is a high chance of the malfunction being caused by the media or media format. In this situation, check with the customer the conditions when the malfunction occurred in accordance with the interview sheet.

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3.	PRELIMINARY INSPECTION

(a) Measure the auxiliary battery voltage with the ignition switch off.

Standard Voltage:

11 to 14 V

(b) Visually inspect for blown fuses, an open or short in a wire harness or improperly connected connectors, etc.

Standard:

Not abnormal

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4.	CHECK CABIN

(a) Check that condensation is not likely to occur in the cabin and that the temperature is not -20°C (-4°F) or lower, or 65°C (149°F) or higher.

HINT:

• A humid cabin and a rapid change in temperature may lead to condensation. Condensation in the cabin may cause a short circuit.
• The audio and visual system may not operate normally when the temperature is -20°C (-4°F) or lower, or 65°C (149°F) or higher.

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5.	CHECK AUDIO AND VISUAL SYSTEM NORMAL CONDITION

(a) Refer to Check System Normal Condition.

Click here

HINT:

Depending on the multi-display settings, the background will remain started even when the ignition switch is turned off. For that reason, check the multi-display setting before performing an inspection.

Click here

Result	Proceed to
Symptom is not normal operation	A
Symptom is normal operation	B

B

END

A

6.	CHECK CAN COMMUNICATION SYSTEM

(a) Using the GTS, select "Communication Bus Check" and check that all ECUs and sensors connected to the CAN communication system are displayed on the screen.

for HEV Model: Click here

for Gasoline Model: Click here

CAN Bus Check

Result	Proceed to
CAN DTCs are not output	A
CAN DTCs are output	B

B

GO TO CAN COMMUNICATION SYSTEM for HEV Model: Click here for Gasoline Model: Click here

A

7.	CHECK FOR DTC

HINT:

Using the GTS, check for DTCs.

(a) Check for DTCs.

(1) Record the results of any DTCs (latest/confirmed)

Body Electrical > Navigation System > Trouble Codes

HINT:

• Check the freeze frame data for both latest DTCs and confirmed DTCs.
• If freeze frame data is stored, a snow icon is displayed to the left.

Item	Details
Latest DTC	Indicates the latest malfunction judgment results during the current trip
Confirmed DTC	Indicates DTCs that have been confirmed

(b) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(c) Recheck for DTCs.

(1) Based on the detection conditions of the DTCs, simulate the malfunction conditions and check if the DTCs are output again.

Click here

Body Electrical > Navigation System > Trouble Codes

HINT:

• If DTCs are output during the speaker line continuity inspection for a vehicle equipped with a stereo component amplifier assembly, refer to Utility.

  Click here

• Depending on the multi-display settings, the background will remain started even when the ignition switch is turned off. For that reason, check the multi-display setting before performing an inspection.

  Click here

Result	Proceed to
DTCs are not output (symptoms can be confirmed or reproduced)	A
DTCs are not output (symptoms cannot be confirmed or reproduced)	B
DTCs are output	C

B

GO TO HOW TO PROCEED WITH TROUBLESHOOTING

C

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

8.	CHECK FOR VEHICLE CONTROL HISTORY (RoB)

(a) Using the GTS, check for vehicle control history (RoB).

Body Electrical > Navigation System > Utility

Tester Display
Vehicle Control History (RoB)

(b) If vehicle control history (RoB) is output, record it.

Result	Proceed to
Vehicle control history (RoB) is not output	A
Vehicle control history (RoB) is output	B

B

GO TO VEHICLE CONTROL HISTORY (RoB)

A

9.	PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here

Result	Proceed to
Fault is not listed in Problem Symptoms Table.	A
Fault is listed in Problem Symptoms Table.	B

B

GO TO STEP 11

A

10.	PERFORM TROUBLESHOOTING BASED ON PROBLEM SYMPTOM

(a) Refer to DIAGNOSIS SYSTEM

Click here

(b) Refer to Terminals of ECU

Click here

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11.	ADJUST, REPAIR OR REPLACE AS NECESSARY

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12.	PERFORM CONFIRMATION TEST

NOTICE:

Depending on the parts that are replaced, performing software update, initialization, registration or calibration may be needed.

Click here

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13.	PROCEDURE AFTER REPLACE

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END

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