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) |
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. CHECK FOR FUEL PUMP OPERATION AND INSPECT FOR FUEL LEAK
(a) Check fuel pump operation.
(1) Connect the Techstream to the DLC3.
(2) Turn the ignition switch to ON and turn the Techstream on.
NOTICE:
Do not start the eng ...
Initialization
INITIALIZATION
NOTICE:
Initialize the headlight leveling ECU assembly (set the zero point of
the height control sensor in the headlight leveling ECU assembly) after
the vehicle height changes due to replacement of the suspension or after
...
Crankshaft Position Sensor "A" Circuit (P0335,P0339)
DESCRIPTION
The crankshaft position sensor system consists of a crank angle sensor plate
and a pickup coil.
The sensor plate has 34 teeth and is installed on the crankshaft. The pickup
coil is made of wound copper wire, an iron core and magnet. The senso ...