DESCRIPTION
This DTC is stored when LIN communication between the sliding roof ECU (sliding roof drive gear sub-assembly) and main body ECU (multiplex network body ECU) stops for 10 seconds or more.
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
B1273 |
No communication between the sliding roof ECU (sliding roof drive gear sub-assembly) and main body ECU (multiplex network body ECU) for 10 seconds or more. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Connect the Techstream to the vehicle and turn a courtesy light switch on and off at 1.5 second intervals until communication between the Techstream and vehicle begins.
HINT:
When communication between the sliding roof ECU (sliding roof drive gear sub-assembly) and main body ECU (multiplex network body ECU) stops, DTC B2325 is also stored.
PROCEDURE
1. |
CLEAR DTC |
(a) Clear the DTCs (See page ).
|
2. |
CHECK FOR DTC |
(a) Check for DTCs (See page ).
OK:
DTC B1273 is not output.
OK | ![]() |
USE SIMULATION METHOD TO CHECK |
|
3. |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)) |
(a) Remove the main body ECU (multiplex network body ECU) from the driver side
junction block assembly (See page ).
(b) Connect the 2B driver side junction block assembly connector.
(c) Disconnect the S10 sliding roof ECU (sliding roof drive gear sub-assembly) connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
A-16 (LIN2) - S10-11 (MPX1) |
Always |
Below 1 Ω |
A-16 (LIN2) or S10-11 (MPX1) - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
GO TO STEP 8 |
|
4. |
CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) - BATTERY AND BODY GROUND) |
(a) Disconnect the S10 sliding roof ECU (sliding roof drive gear sub-assembly) connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
S10-12 (E) - Body ground |
Always |
Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
S10-8 (B) - Body ground |
Always |
11 to 14 V |
S10-1 (IG) - Body ground |
Ignition switch ON |
11 to 14 V |
*a |
Front view of wire harness connector (to Sliding Roof ECU (Sliding Roof Drive Gear Sub-assembly)) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) |
(a) Temporarily replace the sliding roof ECU (sliding roof drive gear sub-assembly)
with a new or normally functioning one (See page
).
|
6. |
CLEAR DTC |
(a) Clear the DTCs (See page ).
|
7. |
CHECK FOR DTC |
(a) Check for DTCs (See page ).
OK:
DTC B1273 is not output.
OK | ![]() |
END (SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) IS DEFECTIVE) |
NG | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
8. |
CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY |
(a) Remove the main body ECU (multiplex network body ECU) from the driver side
junction block assembly (See page ).
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
A-16 (LIN2) - 2B-11 |
Always |
Below 1 Ω |
A-16 (LIN2) or 2B-11 - Body ground |
Always |
10 kΩ or higher |
OK | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)) |
NG | ![]() |
REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY |
Side Auto Step ECU Power Source Circuit
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following
inspection procedure.
PROCEDURE
1.
CHECK HARNESS AND CONNECTOR (SIDE AUTO STEP CONTROLLER ECU - ...
Short in GPS Antenna (B15C0,B15C1)
DESCRIPTION
This DTC is stored when the DCM (Telematics Transceiver) detects an open or a
short in the telephone and GPS antenna circuit. The DCM (Telematics Transceiver)
receives signals at a radio frequency of between 1574.42 and 1576.42 MHz through
t ...