DTC B242F: Open in B Power Line [11/2021 - 12/2023]: Procedure
- CLEAR DTC
Pre-procedure1
- Turn the ignition switch to ON.
- Clear the DTCs.
for Mono Camera Type:
Body Electrical > HL AutoLeveling > Clear DTCs
Body Electrical > HL AutoLeveling (Sub) > Clear DTCs
for Stereo Camera Type:
Body Electrical > AFS > Trouble Codes
Body Electrical > AFS (Sub) > Trouble Codes
Result
Proceed to NEXT
Post-procedure1
- None
Result:
NEXT
See step 2
- CHECK FOR DTC
Pre-procedure1
- Turn the ignition switch to ON.
- Wait 10 seconds or more.
- Check for DTCs.
Mono Camera Type:
Body Electrical > HL AutoLeveling > Trouble Codes
Body Electrical > HL AutoLeveling (Sub) > Trouble Codes
for Stereo Camera Type:
Body Electrical > AFS > Trouble Codes
Body Electrical > AFS (Sub) > Trouble Codes
Result
Result Proceed to B242F is not output A Only B242F for headlight ECU sub-assembly LH is output B Only B242F for headlight ECU sub-assembly RH is output C
Post-procedure1
- None
Result:
A
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2020 - ]
Result:
C
See step 10
Result:
B
See step 3
- CHECK HEADLIGHT ECU SUB-ASSEMBLY LH (ECUB TERMINAL VOLTAGE)
Pre-procedure1
- Disconnect the A96 headlight ECU sub-assembly LH connector.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Switch Condition Specified Condition A96-13 (ECUB) - Body ground Ignition switch ON 11 to 14 V Result
Proceed to OK NG
Post-procedure1
- None
Result:
NG
See step 5
Result:
OK
See step 4
- CHECK HARNESS AND CONNECTOR (HEADLIGHT ECU SUB-ASSEMBLY LH - BODY GROUND)
Pre-procedure1
- Disconnect the A96 headlight ECU sub-assembly LH connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition A96-12 (GND) - Body ground Always Below 1 Ω Result
Proceed to OK NG
Post-procedure1
- None
Result:
OK
REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to REMOVAL [11/2021 - 12/2022] , or refer to REMOVAL [12/2022 - 12/2023]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
- INSPECT H-LP LH RELAY
Pre-procedure1
- Remove the H-LP LH relay.
- Inspect the H-LP LH relay.
Refer to ON-VEHICLE INSPECTION [11/2020 - ]
Result
Proceed to OK NG
Post-procedure1
- None
Result:
NG
REPLACE H-LP LH RELAY
Result:
OK
See step 6
- CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - HEADLIGHT ECU SUB-ASSEMBLY LH)
Pre-procedure1
- Remove the H-LP LH relay.
- Disconnect the A96 headlight ECU sub-assembly LH connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition 5 (H-LP LH relay) - A96-13 (ECUB) Always Below 1 Ω 5 (H-LP LH relay) or A96-13 (ECUB) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Post-procedure1
- None
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 7
- CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - POWER SOURCE)
Pre-procedure1
- Remove the H-LP LH relay.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Switch Condition Specified Condition 1 (H-LP LH relay) - Body ground Ignition switch off 11 to 14 V 3 (H-LP LH relay) - Body ground Ignition switch off 11 to 14 V *a Front view of wire harness connector
(to H-LP LH Relay)Result
Proceed to OK NG
Post-procedure1
- None
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 8
- CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - DRIVER SIDE JUNCTION BLOCK ASSEMBLY)
Pre-procedure1
- Remove the H-LP LH relay.
- Disconnect the 4F driver side junction block assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition 2 (H-LP LH relay) - 4F-19 Always Below 1 Ω 2 (H-LP LH relay) or 4F-19 - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Post-procedure1
- None
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 9
- INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY
Pre-procedure1
- Remove the driver side junction block assembly.
HINT:
Refer to REMOVAL [11/2021 - 12/2022] , or refer to REMOVAL [12/2022 - 12/2023]
*a Component without harness connected
(Driver Side Junction Block Assembly)- - - Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition 4F-19 - A-15 (HRLY) Always Below 1 Ω Result
Proceed to OK NG
Post-procedure1
- None
Result:
OK
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL [11/2021 - 12/2022] , or refer to REMOVAL [12/2022 - 12/2023]
Result:
NG
REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY. Refer to REMOVAL [11/2021 - 12/2022] , or refer to REMOVAL [12/2022 - 12/2023]
- Remove the driver side junction block assembly.
- CHECK HEADLIGHT ECU SUB-ASSEMBLY RH (ECUB TERMINAL VOLTAGE)
Pre-procedure1
- Disconnect the A97 headlight ECU sub-assembly RH connector.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Switch Condition Specified Condition A97-13 (ECUB) - Body ground Ignition switch ON 11 to 14 V Result
Proceed to OK NG
Post-procedure1
- None
Result:
NG
See step 12
Result:
OK
See step 11
- CHECK HARNESS AND CONNECTOR (HEADLIGHT ECU SUB-ASSEMBLY RH - BODY GROUND)
Pre-procedure1
- Disconnect the A97 headlight ECU sub-assembly RH connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition A97-12 (GND) - Body ground Always Below 1 Ω Result
Proceed to OK NG
Post-procedure1
- None
Result:
OK
REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH. Refer to REMOVAL [11/2021 - 12/2022] , or refer to REMOVAL [12/2022 - 12/2023]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
- INSPECT H-LP RH RELAY
Pre-procedure1
- Remove the H-LP RH relay.
- Inspect the H-LP RH relay.
Refer to ON-VEHICLE INSPECTION [11/2020 - ]
Result
Proceed to OK NG
Post-procedure1
- None
Result:
NG
REPLACE H-LP RH RELAY
Result:
OK
See step 13
- CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - HEADLIGHT ECU SUB-ASSEMBLY RH)
Pre-procedure1
- Remove the H-LP RH relay.
- Disconnect the A97 headlight ECU sub-assembly RH connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition 3 (H-LP RH relay) - A97-13 (ECUB) Always Below 1 Ω 3 (H-LP RH relay) or A97-13 (ECUB) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Post-procedure1
- None
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 14
- CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - POWER SOURCE)
Pre-procedure1
- Remove the H-LP RH relay.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Switch Condition Specified Condition 1 (H-LP RH relay) - Body ground Ignition switch off 11 to 14 V 5 (H-LP RH relay) - Body ground Ignition switch off 11 to 14 V *a Front view of wire harness connector
(to H-LP RH Relay)Result
Proceed to OK NG
Post-procedure1
- None
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 15
- CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
Pre-procedure1
- Remove the H-LP RH relay.
- Disconnect the D11 main body ECU (multiplex network body ECU) connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition 2 (H-LP RH relay) - D11-12 (HRY2) Always Below 1 Ω 2 (H-LP RH relay) or D11-12 (HRY2) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Post-procedure1
- None
Result:
OK
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL [11/2021 - 12/2022] , or refer to REMOVAL [12/2022 - 12/2023]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR