10B-29 Body Electrical Control System:
DTC U1144 (No. 1144): Lost Communication with Keyless Start Control Module
S7RS0BA204017
Wiring Diagram
Refer to “DTC U0155 (No. 0155): Lost Communication with Instrument Panel Cluster (IPC) Control Module”.
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC by using scan tool.
3) Start engine and run it for 1 min. or more.
4) Check DTC.
DTC Troubleshooting
DTC detecting condition Trouble area
BCM can not receive data sent by CAN from keyless start control module for
longer than specified time continuously.
• CAN communication circuit
• Combination meter
• Keyless start control module
• BCM (included in junction block
assembly)
Step Action Yes No
1 DTC check of BCM
Is DTC U1144 (No. 1144) and DTC U1073 (No. 1073)
detected together?
Go to “DTC U1073 (No.
1073): Control Module
Communication Bus
Off”.
Go to Step 2.
2 DTC check of keyless start control module
1) Check keyless start control module for DTC.
Is DTC No. 33 detected?
Go to “DTC No. 33:
Control Module
Communication Bus Off
in Section 10E”.
Go to Step 3.
3 Control module connector check
1) Check connection of connectors of all control modules
communicating by means of CAN.
2) Recheck BCM for DTC.
Is DTC U1144 (No. 1144) detected?
Go to Step 4. Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
4 CAN communication circuit check
1) Disconnect connectors from BCM, combination meter
and keyless start control module.
2) Check CAN communication circuit for open, short and
high resistance.
• Between BCM and combination meter
• Between combination meter and keyless start control
module
Is each CAN communication circuit in good condition?
Go to Step 5. Repair circuit.
5 CAN communication circuit check
1) Disconnect connectors of all control modules
communicating by means of CAN.
2) Check CAN communication circuit between control
modules other than Step 4 for open, short and high
resistance.
Is each CAN communication circuit in good condition?
Go to Step 6. Repair circuit.
To Next Page
Loading...
Need help?
General
