| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001GV8D |
| Model Year Start: 2020 | Model: GR Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (w/o Smart Key System): Engine does not Start but Initial Combustion Occurs; 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022] | ||
|
Engine does not Start but Initial Combustion Occurs |
DESCRIPTION
If the key ID codes of the door control transmitter assembly and transponder key ECU assembly match, the immobiliser system is unset and the engine start permission signal is sent to the ECM. When the ID codes of the transponder key ECU assembly and ECM match, the engine starts.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
If the transponder key ECU assembly or ECM is replaced, refer to Registration.
Click here
![2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2019]; THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (w/o Smart Key System): REGISTRATION](/t3Portal/stylegraphics/info.gif)
PROCEDURE
|
1. |
CLEAR DTC |
(a) Clear the DTCs. (for M20A-FKS)
Body Electrical > Immobiliser > Clear DTCs
Powertrain > Engine > Clear DTCs
(b) Clear the DTCs. (for 2ZR-FAE)
Body Electrical > Immobiliser > Clear DTCs
Powertrain > Engine and ECT > Clear DTCs
|
|
2. |
CHECK FOR DTC |
(a) Check for DTCs. (for M20A-FKS)
Body Electrical > Immobiliser > Trouble Codes
Powertrain > Engine > Trouble Codes
(b) Check for DTCs. (for 2ZR-FAE)
Body Electrical > Immobiliser > Trouble Codes
Powertrain > Engine and ECT > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTCs are output |
B |
| B |
|
|
|
3. |
READ VALUE USING TECHSTREAM (IMMOBILISER FUEL CUT STARTS / IMMOBILISER FUEL CUT) |
(a) for M20A-FKS
(1) Connect the Techstream to the DLC3.
(2) Turn the ignition switch to ON.
(3) Turn the Techstream on.
(4) Enter the following menus: Powertrain / Engine / Data List.
(5) Read the Data List according to the display on the Techstream.
Powertrain > Engine > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Immobiliser Fuel Cut Status |
Status of immobiliser system fuel cut |
ON or OFF |
- |
- |
Powertrain > Engine > Data List
|
Tester Display |
|---|
|
Immobiliser Fuel Cut Status |
(b) for 2ZR-FAE
(1) Connect the Techstream to the DLC3.
(2) Turn the ignition switch to ON.
(3) Turn the Techstream on.
(4) Enter the following menus: Powertrain / Engine and ECT / Data List.
(5) Read the Data List according to the display on the Techstream.
Powertrain > Engine and ECT > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Immobiliser Fuel Cut |
Status of immobiliser system fuel cut |
ON or OFF |
- |
- |
Powertrain > Engine and ECT > Data List
|
Tester Display |
|---|
|
Immobiliser Fuel Cut |
OK:
OFF is displayed after the engine is started.
| OK |
|
GO TO SFI SYSTEM for M20A-FKS: Click here
for 2ZR-FAE: Click here
|
|
|
4. |
CHECK WHETHER ENGINE STARTS |
(a) Using a registered door control transmitter assembly, turn the ignition switch to ON.
(b) Check that the engine starts 5 seconds after the ignition switch was turned to ON.
OK:
Engine starts normally.
| OK |
|
|
|
5. |
INSPECT TRANSPONDER KEY ECU ASSEMBLY (TERMINAL EFIO) |
(a) Using an oscilloscope, check the waveform.
|
*a |
Component with harness connected (Transponder Key ECU Assembly) |
*b |
Waveform |
|
*c |
Waveform (detail) |
*d |
Approximately 40 ms. |
|
*e |
Approximately 60 ms. |
- |
- |
OK
|
Tester Connection |
Condition |
Tool Setting |
Specified Condition |
|---|---|---|---|
|
I67-11 (EFIO) - Body ground |
Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal |
2 V/DIV., 500 ms./DIV. |
Pulse generation (See waveform) |
|
Result |
Proceed to |
|---|---|
|
Normal waveform |
A |
|
Waveform not output, or has abnormal wavelength or shape |
B |
| B |
|
|
|
6. |
INSPECT TRANSPONDER KEY ECU ASSEMBLY (TERMINAL EFII) |
(a) Using an oscilloscope, check the waveform.
|
*a |
Component with harness connected (Transponder Key ECU Assembly) |
*b |
Waveform |
|
*c |
Approximately 160 ms. |
*d |
Approximately 270 ms. |
OK
|
Tester Connection |
Condition |
Tool Setting |
Specified Condition |
|---|---|---|---|
|
I67-10 (EFII) - Body ground |
Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal |
2 V/DIV., 500 ms./DIV. |
Pulse generation (See waveform) |
|
Result |
Proceed to |
|---|---|
|
Normal waveform |
A |
|
Waveform not output, or has abnormal wavelength or shape |
B |
| B |
|
REPLACE ECM for M20A-FKS: Click here
for 2ZR-FAE: Click here
|
|
|
7. |
INSPECT TRANSPONDER KEY ECU ASSEMBLY (TERMINAL EFIO) |
(a) Using an oscilloscope, check the waveform.
|
*a |
Component with harness connected (Transponder Key ECU Assembly) |
*b |
Waveform |
|
*c |
Approximately 160 ms. |
*d |
Approximately 270 ms. |
OK
|
Tester Connection |
Condition |
Tool Setting |
Specified Condition |
|---|---|---|---|
|
I67-11 (EFIO) - Body ground |
Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal |
2 V/DIV., 500 ms./DIV. |
Pulse generation (See waveform) |
|
Result |
Proceed to |
|---|---|
|
Normal waveform |
A |
|
Waveform not output, or has abnormal wavelength or shape |
B |
| B |
|
REPLACE TRANSPONDER KEY ECU ASSEMBLY
|
|
|
8. |
REGISTER ECU COMMUNICATION ID |
(a) Register the communication ID between the transponder key ECU assembly and ECM.
Click here
|
|
9. |
CHECK WHETHER ENGINE STARTS |
(a) Using a registered door control transmitter assembly, turn the ignition switch to ON.
(b) Check that the engine starts 5 seconds after the ignition switch was turned to ON.
OK:
Engine starts normally.
|
Result |
Proceed to |
|---|---|
|
Engine can be started |
A |
|
Engine cannot be started |
B |
| A |
|
END (REGISTERED COMMUNICATION ID WAS DEFECTIVE) |
| B |
|
REPLACE TRANSPONDER KEY ECU ASSEMBLY
|
|
10. |
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - ECM) |
(a) Disconnect the I67 transponder key ECU assembly connector.
(b) Disconnect the A46*1 or A47*2 ECM connector.
- *1: for 2ZR-FAE
- *2: for M20A-FKS
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for 2ZR-FAE
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I67-11 (EFIO) - A46-28 (IMI) |
Always |
Below 1 Ω |
|
I67-11 (EFIO) or A46-28 (IMI) - Other terminals and body ground |
Always |
10 kΩ or higher |
for M20A-FKS
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I67-11 (EFIO) - A47-26 (IMI) |
Always |
Below 1 Ω |
|
I67-11 (EFIO) or A47-26 (IMI) - Other terminals and body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE TRANSPONDER KEY ECU ASSEMBLY
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|