THEFT DETERRENT / KEYLESS ENTRY SMART ENTRY AND START SYSTEM(for Start Function, Gasoline Model) B228231 Vehicle Speed Signal Circuit Open B228262 Vehicle Speed Signal Compare Failure
DESCRIPTION
DTC B228231 is stored when the vehicle speed signal sent by the skid control ECU via direct line and the vehicle speed signal sent via CAN communication do not match.
DTC B228262 is stored when a malfunction in the vehicle speed sensor is detected.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|
| B228231 | Vehicle Speed Signal Circuit Open | Vehicle speed signal malfunction is detected (excessive deceleration is detected). (1-trip detection logic*) | ·
Electronically controlled brake system ·
Certification ECU (smart key ECU assembly) ·
Wire harness or connector |
DTC Output Confirmation Operation:
Drive the vehicle at a vehicle speed of 25 km/h (16 mph) or more for 20 seconds, and then drive the vehicle at a vehicle speed of less than 5 km/h (3 mph) for 20 seconds. |
| B228262 | Vehicle Speed Signal Compare Failure | The vehicle speed signal sent by the skid control ECU via direct line and the vehicle speed signal sent via CAN communication do not match. (1-trip detection logic*) | ·
Electronically controlled brake system ·
Certification ECU (smart key ECU assembly) ·
Wire harness or connector |
DTC Output Confirmation Operation:
Drive the vehicle at a vehicle speed of 50 km/h (31 mph) or more for 10 seconds, and then drive the vehicle at a vehicle speed of less than 50 km/h (31 mph). |
*: Only detected while a malfunction is present and the ignition switch is ON.
| DTC Code | Vehicle Condition when Malfunction Detected | Fail-safe Function when Malfunction Detected |
|---|---|---|
| B228231 | ·
The power source mode is changed to off (the engine is stopped) by pressing the engine switch while the vehicle is being driven. ·
With the electrical key transmitter sub-assembly in the cabin, even if an engine start operation is performed, the engine will not start. |
- |
| B228262 | ·
When the signal sent via either direct line or CAN communication is malfunctioning and indicates that the vehicle speed is 0 km/h (0 mph), there is no effect on vehicle behavior. ·
When the signal sent via either direct line or CAN communication is malfunctioning and indicates that the vehicle is moving, the ignition switch cannot be turned from ON to off. |
- |
| DTC No. | Data List and Active Test |
|---|---|
| B228231
B228262 |
Power Source Control
·
Vehicle Running Condition (Line) ·
Power Supply Condition Brake/EPB
·
Vehicle Speed |
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 Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Smart Key. 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 certification ECU (smart key ECU assembly), refer to Service Bulletin.
·After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
PROCEDURE
Read the Data List according to the display on the GTS.
- Chassis > Brake/EPB > Data List
-
Tester Display Measurement Item Range Normal Condition Diagnostic Note Vehicle Speed Vehicle speed Min.: 0.0 km/h (0 mph)
Max.: 6553.5 km/h (4072 mph)Vehicle stopped: 0.0 km/h (0 mph) When driving at constant speed: No large fluctuations
- Chassis > Brake/EPB > Data List
-
Tester Display Vehicle Speed - 50003 435 36
- OK:
Vehicle speed displayed on the GTS is almost the same as the actual vehicle speed measured using a speedometer tester.
- Result:
Proceed to OK NG
OK
NG
Read the Data List according to the display on the GTS.
- Body Electrical > Power Source Control > Data List
-
Tester Display Measurement Item Range Normal Condition Diagnostic Note Vehicle Running Condition (Line) Vehicle being driven or stopped Stop or Running Stop: Vehicle stopped -
- Body Electrical > Power Source Control > Data List
-
Tester Display Vehicle Running Condition (Line) - 50003 454 402
- OK:
The GTS display changes correctly in response to the vehicle condition.
- Result:
Result Proceed to The value of Vehicle Running Condition (Line) is Stop A The value of Vehicle Running Condition (Line) is not Stop B
A
B
Read the Data List according to the display on the GTS.
- Body Electrical > Power Source Control > Data List
-
Tester Display Measurement Item Range Normal Condition Diagnostic Note Vehicle Running Condition (Line) Vehicle being driven or stopped Stop or Running Running: Vehicle being driven at 5 km/h (3 mph) or more -
- Body Electrical > Power Source Control > Data List
-
Tester Display Vehicle Running Condition (Line) - 50003 454 402
- OK:
The GTS display changes correctly in response to the vehicle condition.
- Result:
Result Proceed to The value of Vehicle Running Condition (Line) is Running A The value of Vehicle Running Condition (Line) is not Running B
A
B
Pre-procedure1
Disconnect the A39 skid control ECU (brake actuator assembly) connector.
Disconnect the A126 certification ECU (smart key ECU assembly) connector.
Procedure1
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A126-13 (SPD) - A39-34 (SP1) Always Below 1 Ω A126-13 (SPD) or A39-34 (SP1) - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
Post-procedure1
Connect the A126 certification ECU (smart key ECU assembly) connector.
Connect the A39 skid control ECU (brake actuator assembly) connector.
OK
NG
Using an oscilloscope, check the waveform.
| *a | Component with harness connected
(Certification ECU (Smart Key ECU Assembly)) |
*b | Waveform |
- OK:
Tester Connection Condition Tool Setting Specified Condition A126-13 (SPD) - G170-29 (E) Ignition switch ON, vehicle being driven at approx. 5 km/h (3 mph) 5 V/DIV., 20 ms./DIV. Pulse generation
(See waveform)
- HINT:
-
The wavelength becomes shorter as the vehicle speed increases.
- Result:
Proceed to OK NG
OK
NG