Lexus IS250 IS220d GSE20 ALE20 4GR-FSE STARTING
CHECK DTC OUTPUT (MULTIPLEX NETWORK COMMUNICATION SYSTEM)
CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM)
CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - BODY GROUND)
CHECK WIRE HARNESS (BATTERY - POWER SOURCE CONTROL ECU)
READ VALUE OF INTELLIGENT TESTER (STOP LIGHT SWITCH)
DTC B2284 Brake Signal Malfunction
DESCRIPTION
This DTC is output when: 1) the brake signal circuit between the power source control ECU and the stop light switch is malfunctioning; and 2) the BEAN information is inconsistent.
- HINT:
- When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
| DTC No. | DTC Detection Condition | Trouble Area |
| B2284 | Communication or communication line is abnormal between the power source control ECU and the stop light switch | Stop light switch Multiplex communication system CAN communication system ECM Power source control ECU Wire harness or connector |
WIRING DIAGRAM
INSPECTION PROCEDURE
- HINT:
- Before performing the inspection, depress the brake pedal and check that the stop lights come on. If the stop lights do not come on when the brake pedal is depressed, refer to the page shown in the brackets .
| 1.CHECK DTC OUTPUT (MULTIPLEX NETWORK COMMUNICATION SYSTEM) |
Delete the DTC .
Check for the multiplex network communication system DTCs B1210, B1214 and B1215.
- HINT:
- If the DTCs for the multiplex network communication system malfunction are output, inspect those DTCs first .
- OK:
- No DTC is output.
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| NG | |
| 7.INSPECT STOP LIGHT SWITCH |
Remove the switch.
Measure the resistance of the switch.
- Standard resistance:
Tester Connection Condition Specified Condition 1 - 2 Switch pin free Below 1 Ω 3 - 4 Switch pin free 10 kΩ or higher 1 - 2 Switch pin pushed in 10 kΩ or higher 3 - 4 Switch pin pushed in Below 1 Ω
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| OK | ||
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| 8.READ VALUE OF INTELLIGENT TESTER (STOP LIGHT SWITCH) |
Reconnect the connectors.
Check the DATA LIST for proper functioning of the stop light switch.
| Item | Measurement Item/Display (Range) | Normal Condition | Diagnostic Note |
| Stop Lamp SW1 | Stop light switch 1/ ON or OFF | ON: Brake pedal depressed OFF: Brake pedal released | - |
- OK:
- ON (brake pedal depressed) and OFF (brake pedal released) appear on the screen.
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| OK | ||
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LEXUS IS250, IS220d / GSE20 ALE20