DESCRIPTION
The DTC is stored when the main body ECU (driver side junction block assembly) detects malfunctions in the LIN communication system.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
B124D |
Malfunction in LIN communication system |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CAN communication malfunctions before troubleshooting this symptom.
PROCEDURE
1. |
CHECK FOR DTC |
(a) Clear the DTCs (See page ).
(b) Check for DTCs (See page ).
OK:
DTC B124D is not output.
OK | ![]() |
USE SIMULATION METHOD TO CHECK |
|
2. |
CHECK HARNESS AND CONNECTOR (AFS ECU - INNER REAR VIEW MIRROR ASSEMBLY) |
(a) Disconnect the D44 AFS ECU (headlight swivel ECU assembly) connector.
(b) Disconnect the P12 inner rear view mirror assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D44-10 (SMR) - P12-3 (LIN) |
Always |
Below 1 Ω |
P12-3 (LIN) - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
INSPECT AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) |
(a) Reconnect the D44 AFS ECU (headlight swivel ECU assembly) connector.
(b) Connect an oscilloscope to the P12 inner rear view mirror assembly connector. |
|
(c) Check the waveform. OK:
|
|
OK | ![]() |
REPLACE INNER REAR VIEW MIRROR ASSEMBLY |
NG | ![]() |
REPLACE AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) |
Inspection
INSPECTION
PROCEDURE
1. INSPECT FRONT LOWER BALL JOINT
(a) Inspect the turning torque of the ball joint.
(1) Secure the front lower ball joint in a vise using aluminum plates.
(2) Install the nut to the front lower ball joint stud.
(3) U ...
Actuator Check
ACTUATOR CHECK
1. ACTUATOR CHECK
(a) Start the engine and warm it up.
(b) Perform the indicator check (See page
).
(c) Press the "Recirculation/Fresh" switch to perform the actuator check.
HINT:
Be sure to perform the actuator check after ...
Wireless Door Lock Tuner Circuit Malfunction (B1242)
DESCRIPTION
The door control receiver receives signals from the transmitter and sends these
signals to the main body ECU (driver side junction block assembly).
DTC No.
DTC Detection Condition
Trouble Area
B ...