Toyota CH-R Service Manual: Immobiliser System does not Operate Properly
DESCRIPTION
The immobiliser system compares the ID code that is registered to 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
Refer to B2799.
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CAUTION / NOTICE / HINT
NOTICE:
- When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
- Before replacing the ECM or ID code box (immobiliser code ECU), refer
to Registration.
Click here
- After performing repairs, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
HINT:
If an immobiliser system or SFI system DTC is output, first perform troubleshooting for the immobiliser system or SFI system DTC.
PROCEDURE
|
1. |
CHECK FOR DTC |
(a) Check for DTCs.
Click here
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTCs are output |
B |
| B | .gif) |
GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
.gif)
|
2. |
CHECK WHETHER ENGINE STARTS |
(a) Check that the engine starts 5 seconds after the engine switch turned on (IG).
OK:
Engine starts normally.
| OK | |
USE SIMULATION METHOD TO CHECK |
|
|
3. |
CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - ECM) |
(a) Disconnect the F21 ID code box (immobiliser code ECU) connector.
(b) Disconnect the A38 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F21-3 (EFII) - A38-45 (IMO) |
Always |
Below 1 Ω |
|
F21-4 (EFIO) - A38-28 (IMI) |
Always |
Below 1 Ω |
|
F21-3 (EFII) or A38-45 (IMO) - Body ground |
Always |
10 kΩ or higher |
|
F21-4 (EFIO) or A38-28 (IMI) - Body ground |
Always |
10 kΩ or higher |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
REGISTER ECU COMMUNICATION ID |
(a) Register the ECU communication ID code.
Click here
|
|
5. |
CHECK WHETHER ENGINE STARTS |
(a) Check that the engine starts.
OK:
Engine starts normally.
| OK | |
END (COMMUNICATION ID REGISTRATION WAS DEFECTIVE) |
|
|
6. |
REPLACE ID CODE BOX (IMMOBILISER CODE ECU) |
(a) Replace the ID code box (immobiliser code ECU) with a new one.
Click here
|
|
7. |
REGISTER ECU COMMUNICATION ID |
(a) Register the ECU communication ID code.
Click here
|
|
8. |
CHECK WHETHER ENGINE STARTS |
(a) Check that the engine starts.
OK:
Engine starts normally.
| Result |
Proceed to |
|---|---|
| OK |
A |
| NG (w/o Canister Pump Module) |
B |
| NG (w/ Canister Pump Module) |
C |
| A | |
END (ID CODE BOX (IMMOBILISER CODE ECU) WAS DEFECTIVE) |
| B | |
GO TO SFI SYSTEM |
| C | |
GO TO SFI SYSTEM |
Engine Immobiliser System Malfunction (B2799)
DESCRIPTION
If there is a communication malfunction between the ECM and ID code box (immobiliser
code ECU), or when the communication ID codes do not match, the ECM stores this
DTC.
D ...
Security Indicator Light Does not Blink
DESCRIPTION
The certification ECU (smart key ECU assembly) blinks the security indicator
light (clock assembly) when the immobiliser is set (engine switch off).
WIRING DIAGRAM
CAUTION / NOTICE ...
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DESCRIPTION
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Toyota CH-R Service Manual > Quarter Garnish: Components
COMPONENTS
ILLUSTRATION
*1
NO. 2 REAR PILLAR GARNISH PROTECTOR
*2
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*3
QUARTER PILLAR COVER SUB-ASSEMBLY
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Toyota C-HR (AX20) 2023-2025 Owner's Manual
Toyota CH-R Owners Manual
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Toyota CH-R Service Manual
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