Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM10000000270A4
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 -           ]
Title: NETWORKING: CXPI COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]

HOW TO PROCEED WITH TROUBLESHOOTING

CAUTION / NOTICE / HINT

HINT:

  • Use these procedures to troubleshoot the CXPI communication system.
  • *: Use the GTS.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP
NEXT

2.

INSPECT AUXILIARY BATTERY VOLTAGE

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

Standard voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.

NEXT

3.

CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Using the GTS, check for CAN communication system DTCs.

for HEV Model: Click here 2023 MY Corolla Corolla HV [09/2022 - 11/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM

for Gasoline Model: Click here 2023 MY Corolla Corolla HV [09/2022 - 11/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM

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 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

for Gasoline Model: Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

A

4.

CHECK POWER INTEGRATION SYSTEM*

(a) Use the GTS to check if the power integration system is functioning normally.

Body Electrical > Power Distribution Box > Trouble Codes

Result

Proceed to

Power integration system DTCs are not output

A

Power integration system DTCs are output

B
B

GO TO POWER INTEGRATION SYSTEM

A

5.

CHECK FOR DTC*

(a) Check for DTCs and make a note of any codes that are output.

Body Electrical > Main Body > Trouble Codes

(b) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs

(c) Recheck for DTCs.

Body Electrical > Main Body > Trouble Codes

Result

Proceed to

No DTCs output

A

DTCs output

B
B

GO TO DIAGNOSTIC TROUBLE CODE CHART
A

6.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Data List / Active Test

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; NETWORKING: CXPI COMMUNICATION SYSTEM: DATA LIST / ACTIVE TEST

(b) Terminals of ECU

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; NETWORKING: CXPI COMMUNICATION SYSTEM: TERMINALS OF ECU

NEXT

7.

ADJUST, REPAIR OR REPLACE
NEXT

END