Stop Lamps Turn On Though HDC Does Not Function

WARNING: This page is about a different car, the 2005 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.

INSPECTION OF STOP LAMP RELAY

Turn ignition switch OFF.
Disconnect stop lamp relay connector E12.

Check continuity between stop lamp relay terminals 3 and 5.

CONTINUITY SPECIFICATIONS

Condition	Continuity
12V direct current supply between terminals 1 and 2	Yes
No current supply	No

OK or NG

OK: GO TO 2.
NG: Replace stop lamp relay.

Fig 1: Inspecting Stop Lamp Relay
Courtesy of NISSAN MOTOR CO., U.S.A.

INSPECTION OF STOP LAMP RELAY CIRCUIT
1. Disconnect ABS actuator and electric unit (control unit) connector E125.
2. Check continuity between ABS actuator and electric unit (control unit) connector E125 terminal 13 and ground.
  Continuity should not exist.
OK or NG
- OK: Replace ABS actuator and electric unit (control unit). Refer to "REMOVAL AND INSTALLATION ".
- NG: Repair or replace harness or connector.
  
  Fig 2: Checking Continuity Between ABS Actuator And Electric Unit Connector E125 Terminal 13 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.