WARNING: This page is about a different car, the 2004 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS

Turn ignition switch OFF.
Disconnect display connector and display control unit connector.

Check continuity between display control unit and Display.

CONTINUITY CHECK CHART

Terminals				Continuity
Display control unit		Display
Connector	Terminal (Wire color)	Connector	Terminal (Wire color)
M43	36 (O/L)	M38	11 (O/L)	Yes
M43	38 (W/L)	M38	22 (W/L)	Yes

Check continuity between display control unit and ground.

CONTINUITY CHECK CHART

Terminals
	Display control unit		Ground
Connector	Terminal (Wire color)
M43	36 (O/L)	No
M43	38 (W/L)	No

Fig 1: Checking Continuity Between Display Control Unit And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 2.
NG: Repair harness or connector.

CHECK1: COMMUNICATION SIGNAL (DCU-DSP)
1. Connect display connector.
2. Turn ignition switch ON.
3. Check voltage between display harness connector M38 terminal 11 (O/L) and ground.
  Approx. 4V
  
  Fig 2: Checking Voltage Between Display Harness Connector And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 3.
2. NG: Replace display.
CHECK2: COMMUNICATION SIGNAL (DSP-DCU)
1. Turn ignition switch OFF
2. Disconnect display connector, and connect display control unit connector.
3. Turn ignition switch ON.
4. Check voltage between display control unit harness connector M43 terminal 38 (W/L) and ground.
  Approx. 4V
  
  Fig 3: Checking Voltage Between Display Control Unit Harness Connector And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 4.
2. NG: Replace display control unit.
CHECK3: COMMUNICATION SIGNAL (DCU-DSP)
1. Turn ignition switch OFF.
2. Connect display connector.
3. Turn ignition switch ON.
4. Check signal between display control unit harness connector M43 terminal 36 (O/L) and ground with CONSULT-II or oscilloscope.
  36 (O/L) - Ground: Refer to " TERMINALS AND REFERENCE VALUE FOR DISPLAY CONTROL UNIT ".
  
  Fig 4: Checking Signal Between Display Control Unit Harness Connector And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 5.
2. NG: Replace display control unit.
CHECK4: COMMUNICATION SIGNAL (DSP-DCU)
1. Turn ignition switch ON.
2. Check signal between display control unit harness connector M43 terminal 38 (W/L) and ground with CONSULT-II or oscilloscope.
  38 (W/L) - Ground: Refer to " TERMINALS AND REFERENCE VALUE FOR DISPLAY CONTROL UNIT ".
  
  Fig 5: Checking Signal Between Display Control Unit Harness Connector And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 6.
2. NG: Replace display.
CHECK SELF-DIAGNOSIS OF DCU
1. Turn ignition switch OFF.
2. Replace display control unit.
3. Turn ignition switch ON.
4. Start self-diagnosis of DCU, and check the self-diagnosis result.
OK or NG
1. OK: INSPECTION END.
2. NG: Replace display.

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.

Safety Warning

Display Communication Line Check (Between Display Control Unit and Display)

Use the Manual With the Right Hardware

When to See a Mechanic

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