Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2012 Nissan-Datsun Altima BaseFACTORY OEM SERVICE PROCEDURE

Security Control System (Coupe)

SECURITY CONTROL SYSTEM (COUPE) DIAGNOSTIC TROUBLE CODES (DTC) LIST

DTC	Description
DTC U1000: CAN COMM CIRCUIT	CAN COMM CIRCUIT
DTC U1010: CONTROL UNIT (CAN)	CONTROL UNIT (CAN)
DTC B210B: STARTER CONTROL RELAY	STARTER CONTROL RELAY
B210C: STARTER CONTROL RELAY	STARTER CONTROL RELAY
B210D: STARTER RELAY	STARTER RELAY
DTC B210E: STARTER RELAY	STARTER RELAY
DTC B210F: PNP/CLUTCH INTERLOCK SWITCH	PNP/CLUTCH INTERLOCK SWITCH
DTC B2110: PNP/CLUTCH INTERLOCK SWITCH	PNP/CLUTCH INTERLOCK SWITCH
DTC B2190, P1610: NATS ANTENNA AMP	NATS ANTENNA AMP
DTC B2191, P1615: DIFFERENCE OF KEY	DIFFERENCE OF KEY
DTC B2192, P1611: ID DISCORD, IMMU-ECM	ID DISCORD, IMMU-ECM
DTC B2193, P1612: CHAIN OF ECM-IMMU	CHAIN OF ECM-IMMU
DTC B2195: ANTI-SCANNING	ANTI-SCANNING
DTC B2555: STOP LAMP	STOP LAMP
DTC B2556: PUSH-BUTTON IGNITION SWITCH	PUSH-BUTTON IGNITION SWITCH
DTC B2557: VEHICLE SPEED	VEHICLE SPEED
DTC B2560: STARTER CONTROL RELAY	STARTER CONTROL RELAY
DTC B2601: SHIFT POSITION	SHIFT POSITION
DTC B2602: SHIFT POSITION	SHIFT POSITION
DTC B2603: SHIFT POSITION STATUS	SHIFT POSITION STATUS
DTC B2604: PNP SWITCH	PNP SWITCH
DTC B2605: PNP SWITCH	PNP SWITCH
DTC B2608: STARTER RELAY	STARTER RELAY
DTC B260F: ENGINE STATUS	ENGINE STATUS
DTC B26E8: CLUTCH INTERLOCK SWITCH	CLUTCH INTERLOCK SWITCH
DTC B26EA: KEY REGISTRATION	KEY REGISTRATION
DTC B2617: STARTER RELAY CIRCUIT	STARTER RELAY CIRCUIT
DTC B261E: VEHICLE TYPE	VEHICLE TYPE
DTC B26E1: NO RECEPTION OF ENGINE STATUS SIGNAL	NO RECEPTION OF ENGINE STATUS SIGNAL

Factory Service Tools

Use the Manual With the Right Hardware

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.