DTC B1160

Precautions: Precautions for Diagnosing Trouble · Precautions for Replacing Remote Controller · Precautions for Remote Controller Disposal · Precautions for Replacing Keyless Start Control Module · Precautions for Control Systems · General safety (00)

DTC Detecting Condition and Trouble Area

DTC detecting condition	Trouble area
B1160: Steering Lock Unit Communication Error No communication is available between keyless start control module and steering lock unit.	•Steering lock unit circuit / connector •Steering lock unit •Keyless start control module

Circuit Diagram

[A]:	Keyless start control module connector (View: [a])	A2:	Steering lock unit power supply circuit 2	C2:	Steering lock unit ground circuit 2
[B]:	Steering lock unit connector (View: [b])	B1:	Steering lock unit signal circuit	1.	Steering lock unit
A1:	Steering lock unit power supply circuit 1	C1:	Steering lock unit ground circuit 1	2.	Keyless start control module

DTC Confirmation Procedure

1)Repeat lock / unlock operation of steering lock unit several times.

•Lock: Change ignition “ON” to “OFF” and open a door.
•Unlock: Set ignition “ON” at steering lock conditions.

DTC Troubleshooting

NOTE:

This DTC might be detected when battery is run down or the voltage is very low.

Step	Action	Yes	No
1	Steering lock unit operation check 1)Check that ignition is “OFF”. 2)Set ignition “ON”. 3)Repeat Step 1) – 2) several times. 4)Check that steering lock is locked / unlocked according to change of ignition. Is check result OK?	Check for intermittent trouble.	Go to Step 2.
2	Steering lock unit power supply circuit check 1)Set ignition “OFF”. 2)Disconnect steering lock unit connector. 3)Check for proper terminal connection to steering lock unit connector. 4)If connections are OK, check that voltage between “A2” and “C1” circuit is battery voltage when ignition is switched from “OFF” to “ON”. Is check result OK?	Go to Step 5.	Go to Step 3.
3	Steering lock unit ground circuit check 1)Check that voltage between “A2” circuit and ground is battery voltage when ignition is switched from “OFF” to “ON”. Is check result OK?	Repair or replace “C1” circuit.	Go to Step 4.
4	Steering lock unit power supply circuit check 1)Set ignition “OFF”. 2)Disconnect “G16” connector. 3)Check for proper terminal connection to “G16” connector. 4)If connections are OK, check the following points. •Resistance of “A2” circuit: less than 1 Ω •Resistance between “A2” circuit and ground: infinity •Resistance between “A2” circuit terminal and each terminal at steering lock unit connector: infinity Is check result OK?	Replace keyless start control module and recheck DTC.	Repair or replace defective wire harness.
5	Steering lock unit signal circuit check 1)Set ignition “OFF”. 2)Disconnect “G16” connector. 3)Check for proper terminal connection to “G16” connector. 4)If connections are OK, check the following points. •Resistance of “B1” circuit: less than 1 Ω •Resistance between “B1” circuit and ground: infinity •Resistance between “B1” circuit terminal and each terminal at steering lock unit connector: infinity Is check result OK?	Go to Step 6.	Repair or replace defective wire harness.
6	DTC check 1)Replace steering lock unit. 2)Perform DTC Confirmation Procedure and then recheck DTC. Is DTC B1160 still detected?	Replace keyless start control module and recheck DTC.	End. (Steering lock unit was faulty.)