Open the driver's window all the way down, and close all the doors, then turn the vehicle to the OFF (LOCK) mode.
?4.
Remove all the keyless remotes from inside the vehicle. Hold one keyless remote outside of the opened driver's window at least 20 cm (7.9 in) away from the vehicle.
?5.
With holding the keyless remote outside of the opened driver's window, press the engine start/stop switch, and wait for 30 seconds. Repeat this procedure a total of 5 times.
?6.
Check for DTCs with the HDS.
DTC Description
DTC
B1931 Backup Control Unit No Response
Is DTC B1931 indicated?
YES
Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for loose or poor connections.?
2.
Connector check:
Connector check
?1.
Turn the vehicle to the OFF (LOCK) mode.
?2.
Check for loose connections in the engine start/stop switch 12P connector.
Is the connections OK?
YES
Go to step 3.
NO
Repair the poor connection of engine start/stop switch 12P connector, and then recheck the system.?
3.
Backup control unit SS1(+), SS2(-) lines check:
Backup control unit SS1(+), SS2(-) lines check
?1.
Disconnect the following connector.
Keyless access control unit connector B (36P)
?2.
Turn the vehicle to the ON mode, and keep pressing the engine start/stop switch.
?3.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode Keyless access control unit connector B (36P): disconnected