Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GH8R
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 11/2022]
Title: 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING; 2020 - 2023 MY Corolla [01/2019 - 11/2022]

HOW TO PROCEED WITH TROUBLESHOOTING

CAUTION / NOTICE / HINT

HINT:

*: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

CUSTOMER PROBLEM ANALYSIS

NEXT

3.

CONNECT TECHSTREAM TO DLC3*

HINT:

If the display indicates a communication fault in the Techstream, inspect the DLC3.

When any CAN communication system DTCs are output, perform troubleshooting on the CAN communication system first.

NEXT

4.

CHECK DTC AND FREEZE FRAME DATA*

(a) Check for DTCs.

Powertrain > Engine and ECT > Trouble Codes

(b) Check for Freeze Frame Data.

Click here 2020 MY Corolla [01/2019 - 04/2020]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: FREEZE FRAME DATA 2021 - 2023 MY Corolla [04/2020 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: FREEZE FRAME DATA

HINT:

Record or print DTCs and Freeze Frame Data if necessary.

NEXT

5.

CLEAR DTC AND FREEZE FRAME DATA*

(a) Clear the DTCs and Freeze Frame Data.

Powertrain > Engine and ECT > Clear DTCs

NEXT

6.

CONDUCT VISUAL INSPECTION

NEXT

7.

SELECT CHECK MODE DIAGNOSIS*

(a) Switch the ECM from normal mode to check mode.

Powertrain > Engine and ECT > Utility

Tester Display

Check Mode

HINT:

Refer to Check Mode Procedure.

Click here 2020 - 2023 MY Corolla [01/2019 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: CHECK MODE PROCEDURE

NEXT

8.

CONFIRM PROBLEM SYMPTOMS

(a) Confirm problem symptoms.

HINT:

If the engine does not start, first perform the "Check DTC" procedure and "Conduct Basic Inspection" procedure below.

Result

Proceed to

Malfunction does not occur

A

Malfunction occurs

B

B

GO TO STEP 10

A

9.

SIMULATE SYMPTOMS

HINT:

Refer to Symptom Simulation.

Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING

NEXT

10.

CHECK DTC*

(a) Check for DTCs.

Powertrain > Engine and ECT > Trouble Codes

HINT:

Refer to DTC Check / Clear.

Click here 2020 MY Corolla [01/2019 - 03/2019]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR 2020 - 2022 MY Corolla [03/2019 - 09/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR 2023 MY Corolla [09/2022 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

Result

Proceed to

DTCs are output

A

DTCs are not output

B

B

GO TO STEP 12

A

11.

REFER TO DTC CHART

HINT:

Refer to Diagnostic Trouble Code Chart.

Click here 2020 MY Corolla [01/2019 - 03/2019]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2020 MY Corolla [03/2019 - 04/2020]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2021 - 2022 MY Corolla [04/2020 - 09/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2023 MY Corolla [09/2022 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART

NEXT

12.

CONDUCT BASIC INSPECTION

(a) Conduct basic inspection.

HINT:

Refer to Basic Inspection.

Click here 2020 - 2023 MY Corolla [01/2019 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: BASIC INSPECTION

Result

Proceed to

Malfunctioning parts not confirmed

A

Malfunctioning parts confirmed

B

B

GO TO STEP 17

A

13.

REFER TO PROBLEM SYMPTOMS TABLE

HINT:

Refer to Problem Symptoms Table.

Click here 2020 - 2022 MY Corolla [01/2019 - 09/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: PROBLEM SYMPTOMS TABLE 2023 MY Corolla [09/2022 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: PROBLEM SYMPTOMS TABLE

Result

Proceed to

Malfunctioning circuit confirmed

A

Malfunctioning parts confirmed

B

B

GO TO STEP 17

A

14.

CHECK ECM POWER SOURCE CIRCUIT

(a) Check the ECM power source circuit.

HINT:

Refer to ECM Power Source Circuit.

Click here 2020 - 2022 MY Corolla [01/2019 - 09/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: ECM Power Source Circuit 2023 MY Corolla [09/2022 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: ECM Power Source Circuit

NEXT

15.

CONDUCT CIRCUIT INSPECTION

Result

Proceed to

Malfunction not confirmed

A

Malfunction confirmed

B

B

GO TO STEP 18

A

16.

CHECK FOR INTERMITTENT PROBLEMS

(a) Check for intermittent problems.

HINT:

Refer to Check for Intermittent Problems.

Click here 2020 - 2023 MY Corolla [01/2019 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: CHECK FOR INTERMITTENT PROBLEMS

NEXT

17.

CONDUCT PARTS INSPECTION

NEXT

18.

IDENTIFY PROBLEM

NEXT

19.

ADJUST AND/OR REPAIR

NEXT

20.

CONDUCT CONFIRMATION TEST

NEXT

END