DTC Code | DTC Name |
---|---|
U1115 | Lost Communication with Tilt and Telescopic Module |
DESCRIPTION
DTC No. | DTC Detection Condition | Trouble Area |
---|---|---|
U1115 | No communication from the multiplex tilt and telescopic ECU continues. |
|
Tech Tips
This diagnosis procedure is for when DTC U1115 is output by the main body ECU (GTS display: Main Body).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Note
Before measuring the resistance of the CAN bus, turn the power switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Click here.
Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output Click here.
After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.
DTC check procedure: Turn the power switch on (IG) and wait at least 20 seconds.
After the repair, perform CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed Click here.
Tech Tips
Operating the power switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
PROCEDURE
RECONFIRM DTC OUTPUT
Reconfirm DTCs.
Tech Tips
If DTC U1002 is output from Main Body of the main body ECU, this indicates a sub bus 1 malfunction. Troubleshoot for DTC U1002 and check for malfunctions in sub bus 1.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC Click here |
A |
CHECK FOR OPEN IN SUB BUS 1 LINES (MULTIPLEX TILT AND TELESCOPIC ECU BRANCH LINE)
Disconnect the cable from the negative (-) auxiliary battery terminal.
*a | Front view of wire harness connector (to Multiplex Tilt and Telescopic ECU) |
Disconnect the H12 multiplex tilt and telescopic ECU connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU) |
OK |
CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)
*a | Front view of wire harness connector (to Multiplex Tilt and Telescopic ECU) |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT) |
OK |
CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)
Connect the cable to the negative (-) auxiliary battery terminal.
*a | Front view of wire harness connector (to Multiplex Tilt and Telescopic ECU) |
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
OK |
REPLACE MULTIPLEX TILT AND TELESCOPIC ECU Click here |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |