DTC B2284: Brake Signal Malfunction [10/2014 - ]: Procedure
- READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH1)
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Enter the following menus: Body Electrical / Power Source Control / Data List.
- Read the Data List according to the display on the Techstream.
Body Electrical > Power Source Control > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note Stop Light Switch1 State of brake pedal OFF or ON OFF: Brake pedal released
ON: Brake pedal depressed- Use this item to determine whether the stop light switch is malfunctioning.
- The hybrid control system cannot be started when this item is OFF.
- If the stop light switch is malfunctioning, the hybrid control system can be started by pressing and holding the power switch for a certain period of time.
Body Electrical > Power Source Control > Data List
Tester Display Stop Light Switch1 OK
The Techstream display changes correctly in response to the brake pedal operation.
Result
Proceed to OK NG
Result:
OK
GO TO HYBRID CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - ]
Result:
NG
See step 2
- CHECK HARNESS AND CONNECTOR (POWER SOURCE)
See step 1
Result
Proceed to OK NG Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE
Result:
OK
See step 3
- CHECK HARNESS AND CONNECTOR (GROUND)
See step 2
Result
Proceed to OK NG Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 4
- CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY)
- Disconnect the I51 certification ECU (smart Key ECU assembly) connector.
- Disconnect the A1 stop light switch assembly connector.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition A1-1 (B) - Body ground Always 11 to 14 V *a Front view of wire harness connector
(to Stop Light Switch Assembly) - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition I51-2 (STP1) - A1-2 (L) Always Below 1 Ω I51-2 (STP1) or A1-2 (L) - Body ground Always 10 kΩ or higher A1-3 (GND) - Body ground Always Below 1 Ω Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 5
- CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
- Reconnect the I51 and I53 certification ECU (smart Key ECU assembly) connectors.
- Reconnect the A1 stop light switch assembly connector.
- Measure the voltage according to the value(s) in the table below.
*a Component with harness connected
(Certification ECU (Smart Key ECU Assembly))Standard Voltage
Tester Connection Condition Specified Condition I51-2 (STP1) - Body ground Brake pedal released → depressed 1 V or less → 9 V or higher Result
Proceed to OK NG
Result:
OK
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to REMOVAL [10/2014 - ]
Result:
NG
REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to REMOVAL [10/2014 - ]