DTC Troubleshooting: B12E4

DTC B12E4: Electric steering lock high level failure of MTRCUT2

DTC Description	DTC
B12E4 Electric steering lock high level failure of MTRCUT2

NOTE:

	If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.
	Before troubleshooting, make sure the No. C32 (15 A) and No. C3 (10 A) fuses in the under-dash fuse/relay box are OK.

Problem verification:

Problem verification

?1.	Turn the vehicle to the ON mode.

?2.	Clear the DTCs with the HDS.

?3.	Do this procedure 10 times: Turn the vehicle to the OFF (LOCK) mode, ACCESSORY mode, ON mode, and OFF (LOCK) mode.

?4.	Turn the vehicle to the ON mode.

?5.

Check for DTCs with the HDS.

DTC Description	DTC
B12E4 Electric steering lock high level failure of MTRCUT2

Is DTC B12E4 indicated?

Go to step 2.

Intermittent failure, the system is OK at this time. Check for loose or poor connections.?

Open wire check (GND line):

Open wire check (GND line)

?1.

Disconnect the following connectors.

Electric steering lock 12P connector

?2.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode Electric steering lock 12P connector: disconnected
Test point 1	Electric steering lock 12P connector No. 7
Test point 2	Body ground

Is there continuity?

The GND wire is OK. Go to step 3.

Repair an open or high resistance in the ground wire or poor ground (G401).?

Open wire check (MTR CUT 2 (IG1) line):

Open wire check (MTR CUT 2 (IG1) line)

?1.

Disconnect the following connector.

Keyless access control unit connector B (36P)

?2.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode Electric steering lock 12P connector: disconnected Keyless access control unit connector B (36P): disconnected
Test point 1	Electric steering lock 12P connector No. 4
Test point 2	Keyless access control unit connector B (36P) No. 6

Is there continuity?

Repair an open or high resistance in the wire.?