ENTRY AND START SYSTEM(for Start Function), Diagnostic DTC:B2286, B228A, P0335

DTC Code	DTC Name
B2286	Runnable Signal Malfunction
B228A	Engine Speed Signal Circuit
P0335	Crankshaft Position Sensor Circuit Malfunction (NE Signal)

DESCRIPTION

These DTCs are stored when the engine speed signal sent by the ECM via direct line and the engine speed signal sent via CAN communication do not match.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
B2286	Runnable Signal Malfunction	The engine speed signal sent by the ECM via direct line and the engine speed signal sent via CAN communication do not match. (1-trip detection logic1)2	AM2 fuse SFI system Certification ECU (Smart key ECU assembly) Wire harness or connector	DTC Output Confirmation Operation: Disconnect the cable from the negative (-) battery terminal, wait 30 seconds and reconnect the cable to the negative (-) battery terminal. Wait 20 seconds or more with the engine switch off, then start the engine and maintain an engine speed of 1000 rpm or more for 20 seconds or more.
B228A	Engine Speed Signal Circuit	The engine speed signal sent by the ECM via direct line and the engine speed signal sent via CAN communication do not match. (1-trip detection logic1)3	AM2 fuse SFI system Certification ECU (Smart key ECU assembly) Wire harness or connector	DTC Output Confirmation Operation: Disconnect the cable from the negative (-) battery terminal, wait 30 seconds and reconnect the cable to the negative (-) battery terminal. Wait 20 seconds or more with the engine switch off, then start the engine and maintain an engine speed of 1000 rpm or more for 20 seconds or more.
P0335	Crankshaft Position Sensor Circuit Malfunction (NE Signal)	The engine speed signal sent by the ECM via direct line and the engine speed signal sent via CAN communication do not match. (1-trip detection logic*1)	AM2 fuse SFI system Certification ECU (Smart key ECU assembly) Wire harness or connector	DTC Output Confirmation Operation: Allow the engine to idle for 10 seconds or more.

*1: Only detected while a malfunction is present and the engine switch is on (IG).
*2: w/o Stop and Start System
*3: w/ Stop and Start System

Vehicle Condition and Fail-safe Function when Malfunction Detected
Vehicle Condition when Malfunction Detected	Fail-safe Function when Malfunction Detected
When a malfunction occurs and the vehicle speed signal sent via either direct line or CAN communication indicates no vehicle speed, there is no effect on vehicle behavior. (A malfunction is detected after the engine switch is turned on (IG).) When a malfunction occurs and the vehicle speed signal sent via either direct line or CAN communication indicates that the vehicle is moving, the engine cannot be started. However, the engine can be started after the engine switch has been turned off.	When a malfunction occurs and the vehicle speed signal sent via either direct line or CAN communication indicates no vehicle speed, 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: If the following conditions are met, it can be determined that the malfunction is not in the CAN communication system but in the direct line (NE). When the engine switch is pressed, the system controls the engine based on the starter OFF permission flag (perfect injection signal judgment) via CAN communication, causing the engine to stop cranking. When the engine switch is pressed and held, the system controls the engine based on the engine speed signal via CAN communication, causing the engine to stop cranking. If the following conditions are met, it can be determined that the malfunction is not in the direct line (NE) but in the CAN communication system. When the engine switch is pressed, the system controls the engine based on the engine speed signal via direct line, causing the engine to stop cranking. When the engine switch is pressed and held, the system controls the engine based on the engine speed signal via direct line, causing the engine to stop cranking. If the following conditions are met, it can be determined that there is a malfunction in both the CAN communication system and the direct line (NE). When the engine switch is pressed, the engine stops cranking after 6 seconds. When the engine switch is pressed and held, the engine cranks for up to 30 seconds.

Related Data List and Active Test Items
DTC No.	Data List and Active Test
B22861 B228A2 P0335	Power Source Control Engine Condition Starting Control Engine Speed

*1: w/o Stop and Start System
*2: w/ Stop and Start System

WIRING DIAGRAM

CAUTION / NOTICE / HINT

Note

When using the GTS with the engine 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 / Entry&Start(CAN). 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 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 entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

Click here
Inspect the fuses of circuits related to this system before performing the following procedure.
Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for Start Function) Precaution.

Click here
After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

Tech Tips

When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

PROCEDURE

READ VALUE USING GTS (ENGINE CONDITION / ENGINE SPEED)

Connect the GTS to the DLC3.
Turn the Engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Power Source Control or Starting Control / Data List.

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
Engine Condition	Engine state	Stop or Run	Stop: Engine stopped Run: Engine running	-

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Engine Condition

Engine state

Stop or Run

Stop: Engine stopped

Run: Engine running

Body Electrical > Power Source Control > Data List

Tester Display
Engine Condition

Body Electrical > Starting Control > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Engine Speed	Engine speed	0 to 16383 rpm	Fluctuates in accordance with actual engine speed	-

Body Electrical > Starting Control > Data List

Tester Display
Engine Speed

OK
The GTS display changes correctly in response to the engine condition.

Result

Proceed to
OK
NG

GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) for 8AR-FTS: Click here
GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) for 2GR-FKS (w/ Canister Pump Module): Click here
GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) for 2GR-FKS (w/o Canister Pump Module): Click here

CHECK HARNESS AND CONNECTOR (POWER SOURCE)

Result

Proceed to
OK
NG

*a
Front view of wire harness connector

(to Certification ECU (Smart Key ECU Assembly))

Disconnect the J41 certification ECU (smart key ECU assembly) connector.

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
J41-4 (+B) - Body ground	Always	11 to 14 V

Result

Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE

CHECK HARNESS AND CONNECTOR (GROUND)

Result

Proceed to
OK
NG

*a	Front view of wire harness connector (to Certification ECU (Smart Key ECU Assembly))

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
J41-18 (E) - Body ground	Always	Below 1 Ω

Result

Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ECM)

Disconnect the A74 certification ECU (smart key ECU assembly) connector.
Disconnect the A46*1 or A37*2 ECM connector.
- *1: for 8AR-FTS
- *2: for 2GR-FKS

Measure the resistance according to the value(s) in the table below.

Standard Resistance

for 8AR-FTS
Tester Connection	Condition	Specified Condition
A74-16 (NE) - A46-30 (NEO)	Always	Below 1 Ω
A74-16 (NE) or A46-30 (NEO) - Body ground	Always	10 kΩ or higher

for 2GR-FKS
Tester Connection	Condition	Specified Condition
A74-16 (NE) - A37-30 (NEO)	Always	Below 1 Ω
A74-16 (NE) or A37-30 (NEO) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Reconnect the A74 and J41 certification ECU (smart key ECU assembly) connectors.
Reconnect the A46*1 or A37*2 ECM connector.
- *1: for 8AR-FTS
- *2: for 2GR-FKS

*a	Component with harness connected (Certification ECU (Smart Key ECU Assembly))

Using an oscilloscope, check the engine speed input signal waveform at the terminal of the certification ECU (smart key ECU assembly).

Standard Frequency

Tester Connection	Condition	Specified Condition
A74-16 (NE) - Body ground	Engine stopped	No pulse generation
A74-16 (NE) - Body ground	Engine running	Pulse generation

Result

Proceed to
OK
NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)