THEFT DETERRENT / KEYLESS ENTRY SMART ENTRY AND START SYSTEM(for Start Function, Gasoline Model) Immobiliser System does not Operate Properly
DESCRIPTION
The immobiliser function compares the ID code that is registered in the certification ECU (smart key ECU assembly) with the ID code of the transponder chip that is embedded in the electrical key transmitter sub-assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- NOTICE:
- ·
When using the GTS with the ignition switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Entry&Start. While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.
·The smart entry and start system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart entry and start system (for Start Function) after confirming that the communication systems are functioning properly.
·Before replacing the ECM or certification ECU (smart key ECU assembly), refer to Service Bulletin.
·After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
- HINT:
-
If an immobiliser function or engine DTC is output, first perform troubleshooting for the immobiliser function or engine DTC.
PROCEDURE
Check for DTCs.
- Body Electrical > Entry&Start > Trouble Codes
- 50001 440
- Powertrain > Engine > Trouble Codes
- 50001 372
- Result:
Result Proceed to DTCs are not output A DTCs are output B
A
B
Read the Data List according to the display on the GTS.
- Powertrain > Engine > Data List
-
Tester Display Measurement Item Range Normal Condition Diagnostic Note Immobiliser Fuel Cut Status Immobiliser fuel cut status OFF or ON OFF: Fuel cut OFF
ON: Fuel cut ON-
- Powertrain > Engine > Data List
-
Tester Display Immobiliser Fuel Cut Status - 50003 372 65
- Result:
Result Proceed to On the GTS screen, ON is displayed. A On the GTS screen, OFF is displayed. B
A
for M20C-FKS:
for M20D-FKS:
B
Check that the engine starts after 5 seconds of the ignition switch being turned to ON.
- OK:
Engine starts normally.
- Result:
Proceed to OK NG
OK
NG
Disconnect the G57 ID code box (immobiliser code ECU) connector.
Disconnect the A125*1 or A116*2 ECM connector.
*1: for GTMC Made
*2: for SFTM Made
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
for GTMC Made: Tester Connection Condition Specified Condition A125-55 (IMO) - G57-3 (EFII) Always Below 1 Ω A125-55 (IMO) or G57-3 (EFII) - Other terminals and body ground Always 10 kΩ or higher A125-54 (IMI) - G57-4 (EFIO) Always Below 1 Ω A125-54 (IMI) or G57-4 (EFIO) - Other terminals and body ground Always 10 kΩ or higher
for SFTM Made: Tester Connection Condition Specified Condition A116-55 (IMO) - G57-3 (EFII) Always Below 1 Ω A116-55 (IMO) or G57-3 (EFII) - Other terminals and body ground Always 10 kΩ or higher A116-54 (IMI) - G57-4 (EFIO) Always Below 1 Ω A116-54 (IMI) or G57-4 (EFIO) - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
Connect the A125*1 or A116*2 ECM connector.
*1: for GTMC Made
*2: for SFTM Made
Connect the G57 ID code box (immobiliser code ECU) connector.
Using an oscilloscope, check the waveform.
| *a | Component with harness connected
(ID Code Box (Immobiliser Code ECU)) |
*b | Approximately 160 ms. |
| *c | Approximately 270 ms. | *d | Approximately 40 ms. |
| *e | Approximately 60 ms. | *f | Waveform (EFII) |
| *g | Waveform (EFIO) | *h | Waveform 1 |
| *i | Waveform 2 | *j | Waveform 3 |
| *k | Waveform 1 (detail) | - | - |
- NOTICE:
-
The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.
- OK:
Tester Connection Condition Tool Setting Specified Condition G57-3 (EFII) - Body ground Within 3 seconds of engine start or within 3 seconds of ignition switch turned to ON after auxiliary battery cable disconnected and reconnected 2 V/DIV., 500 ms./DIV. Pulse generation
(See waveform 2)G57-4 (EFIO) - Body ground Within 3 seconds of engine start or within 3 seconds of ignition switch turned to ON after auxiliary battery cable disconnected and reconnected 2 V/DIV., 500 ms./DIV. Pulse generation
(See waveform 1 and 3)
- Result:
Result Proceed to Normal waveform A Waveform 1 is not output, or has abnormal wavelength or shape B Waveform 2 or is not output, or has abnormal wavelength or shape C
A
B
C
for M20C-FKS:
for M20D-FKS:
Register the ECU communication ID codes.
- HINT:
-
Refer to Service Bulletin.
- Result:
Proceed to NEXT
NEXT
Check that the engine starts.
- OK:
Engine starts normally.
- Result:
Proceed to OK NG
OK
NG