Power Supply and Ground Circuit Inspection

CHECK FUSE

Check for blown unified meter and A/C amp. fuses.

BATTERY VOLTAGE SPECIFICATION

Power source	Fuse No.
Battery power supply	19
ACC power supply	10, 11
Ignition power supply	12

OK or NG

OK : GO TO 2.

NG : Be sure to eliminate cause of malfunction before installing new fuse. Refer to "POWER SUPPLY ROUTING CIRCUIT ".

CHECK POWER SUPPLY CIRCUIT

Check voltage between unified meter and A/C amp. harness connector terminals and ground.

TERMINALS REFERENCE VALUE CHART

Terminals			Ignition switch position
(+)		(-)	OFF	ACC	ON
Connector	Terminal	(-)	OFF	ACC	ON
M56	21	Ground	Battery voltage	Battery voltage	Battery voltage
M56	22		0 V	0 V	Battery voltage
M57	46		0 V	Battery voltage	Battery voltage

OK or NG

OK : GO TO 3.

NG : Check harness between unified meter and A/C amp. and fuse.

Fig 1: Identifying Harness Between Unified Meter And A/C Amp

G04078475

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

CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector.
3. Check continuity between unified meter and A/C amp. harness connector M56 terminals 29, 30 and ground.
  29 - Ground : Continuity should exist.
  
  30 - Ground
OK or NG

OK : INSPECTION END

NG : Repair harness or connector.

Fig 2: Identifying Continuity Between Unified Meter And A/C Amp
Courtesy of NISSAN MOTOR CO., U.S.A.