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.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Note |
---|---|---|---|---|
B2799 |
Engine Immobiliser System Malfunction |
Either condition is met (1 trip detection logic*):
|
|
DTC output confirmation operation (Perform either of the following):
|
Vehicle Condition |
||||
---|---|---|---|---|
Pattern 1 |
Pattern 2 |
Pattern 3 |
||
Diagnosis Condition |
Engine start operation. |
○ |
○ |
○ |
Malfunction Status |
A malfunction in the communication between the ECM and ID code box (immobiliser code ECU). |
○ |
- |
- |
A malfunction in the communication lines between the ECM and ID code box (immobiliser code ECU). |
- |
○ |
- |
|
A matching communication code cannot be verified during communication between the ECM and ID code box (immobiliser code ECU). |
- |
- |
○ |
|
Detection Time |
- |
- |
||
Number of Trips |
1 trip |
1 trip |
1 trip |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
Vehicle Condition and Fail-safe Operation when Malfunction Detected
Vehicle Condition when Malfunction Detected |
Fail-safe Operation when Malfunction Detected |
---|---|
Engine cannot be started |
- |
DTC No. |
Data List and Active Test |
---|---|
B2799 |
- |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
HINT:
When DTC B2799 and the certification ECU (smart key ECU assembly) DTC are output simultaneously, first perform troubleshooting for the certification ECU (smart key ECU assembly) DTC.
PROCEDURE
1. |
REGISTER ECU COMMUNICATION ID |
(a) Register the ECU communication ID code.
Click here
|
2. |
CLEAR DTC |
(a) Clear the DTCs.
Click here
Powertrain > Engine and ECT > Clear DTCs
|
3. |
CHECK FOR DTC |
(a) Perform "DTC Output Confirmation Operation" procedure.
(b) Check for DTCs.
Click here
Powertrain > Engine and ECT > Trouble CodesOK:
B2799 is not output.
OK |
END (COMMUNICATION ID REGISTRATION WAS DEFECTIVE) |
|
4. |
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 |
---|---|---|
F21-4 (EFIO) - A38-28 (IMI) |
Always |
Below 1 Ω |
F21-3 (EFII) - A38-45 (IMO) |
Always |
Below 1 Ω |
F21-4 (EFIO) or A38-28 (IMI) - Body ground |
Always |
10 kΩ or higher |
F21-3 (EFII) or A38-45 (IMO) - Body ground |
Always |
10 kΩ or higher |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
REPLACE ID CODE BOX (IMMOBILISER CODE ECU) |
(a) Replace the ID code box (immobiliser code ECU) with a new one.
Click here
|
6. |
REGISTER RECOGNITION CODE |
(a) Register the recognition codes in the ECUs.
Click here
|
7. |
REGISTER ECU COMMUNICATION ID |
(a) Register the ECU communication ID.
Click here
|
8. |
CHECK WHETHER ENGINE STARTS |
(a) Check that the engine starts.
OK:
Engine starts normally.
NG |
REPLACE ECM |
|
9. |
CLEAR DTC |
(a) Clear the DTCs.
Click here
Powertrain > Engine and ECT > Clear DTCs
|
10. |
CHECK FOR DTC |
(a) Perform "DTC Output Confirmation Operation" procedure.
(b) Check for DTCs.
Click here
Powertrain > Engine and ECT > Trouble CodesOK:
B2799 is not output.
OK |
END (ID CODE BOX (IMMOBILISER CODE ECU) WAS DEFECTIVE) |
NG |
REPLACE ECM |
Toyota CH-R Service Manual > Audio And Visual System(for Radio And Display Type): Black Screen
PROCEDURE
1.
CHECK DISPLAY SETTING
(a) Check that the display is not in screen off mode.
OK:
The display setting is not in screen off mode.
NG
CHANGE SCREEN TO SCREEN ON MODE
OK
...
Toyota CH-R Service Manual > Audio And Visual System(for Radio Receiver Type): Illumination Circuit
DESCRIPTION
Power is supplied to the radio receiver assembly and steering pad switch assembly
illumination when the light control switch is in the tail or head position.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
The vehicle is equipped with a Supplemental Restraint System (SRS) ...