DESCRIPTION
This DTC is stored when LIN communication between the sliding roof ECU (sliding roof drive gear sub-assembly) and main body ECU (driver side junction block assembly) stops for more than 10 seconds.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
B1273 |
No communication between the sliding roof ECU (sliding roof drive gear sub-assembly) and main body ECU (driver side junction block assembly) for more than 10 seconds. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Connect the Techstream to the DLC3, and turn the courtesy switch on and off at 1.5-second intervals until communication between the Techstream and vehicle begins.
PROCEDURE
1. |
CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU - BATTERY AND BODY GROUND) |
(a) Disconnect the P4 ECU connector. |
|
(b) Measure the resistance and voltage according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
P4-2 (E) - Body ground |
Always |
Below 1 Ω |
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
P4-1 (B) - Body ground |
Always |
11 to 14 V |
*1 |
Front view of wire harness connector (to Sliding Roof ECU (Sliding Roof Drive Gear Sub-assembly)) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
2. |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SLIDING ROOF ECU) |
(a) Disconnect the D48 ECU connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D48-10 (LIN2) - P4-4 (LIN) |
Always |
Below 1 Ω |
P4-4 (LIN) - Body ground |
Always |
10 kΩ or higher |
*1 |
Front view of wire harness connector (to Main Body ECU (Driver Side Junction Block Assembly)) |
*2 |
Front view of wire harness connector (to Sliding Roof ECU (Sliding Roof Drive Gear Sub-assembly)) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) |
(a) Replace the sliding roof ECU (sliding roof drive gear sub-assembly) (See
page ).
|
4. |
CHECK DTC OUTPUT |
(a) Clear the DTC (See page ).
(b) Recheck for DTCs.
OK:
DTC B1273 is not output.
OK | ![]() |
END (SLIDING ROOF ECU WAS DEFECTIVE) |
NG | ![]() |
REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) |
Installation
INSTALLATION
PROCEDURE
1. INSTALL STUD BOLT (for LH Side)
(a) Install the stud bolt.
Torque:
17 N·m {173 kgf·cm, 13 ft·lbf}
2. INSTALL STUD BOLT (for RH Side)
HINT:
Perform the same proc ...
Freeze Frame Data
FREEZE FRAME DATA
1. CHECK FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Navigation System / Trouble
Codes.
(e) Select a DTC to ...
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use this procedure to troubleshoot the theft deterrent system.
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
...