Communication Line Inspection

Check combination meter, unified meter and A/C amp. and terminals (combination meter side, unified meter and A/C amp. side, and harness side) for looseness or bent terminals.

OK or NG

• OK: GO TO  2.
• NG: Repair terminal or connector.

Does the pointer on the meter/gauges fluctuate when starting the engine?

Is the fluctuation acceptable?

• YES: GO TO  3.
• NO: GO TO  6.

1. Turn ignition switch OFF.
2. Disconnect combination meter and unified meter and A/C amp. connectors.
3. Check continuity between combination meter harness connector M24 terminal 22 (BR/Y) and unified meter and A/C amp. harness connector M49 terminal 19 (BR/Y).

   Continuity should exist. 

4. Check continuity between combination meter harness connector M24 terminal 22 (BR/Y) and ground.

   Continuity should not exist. 

   Fig 1: Checking Continuity Between Combination Meter Harness Connector M24 Terminal 22 And Ground

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

OK or NG

• OK: GO TO  4.
• NG: Repair harness or connector.

1. Connect unified meter and A/C amp. connector.
2. Turn ignition switch ON.
3. Check voltage between combination meter harness connector M24 terminal 22 (BR/Y) and ground.

   Approx. 5 V 

   Fig 2: Checking Voltage Between Combination Meter Harness Connector M24 Terminal 22 & Ground

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

OK or NG

• OK: GO TO  5.
• NG: Replace the unified meter and A/C amp. Refer to REMOVAL AND INSTALLATION OF UNIFIED METER AND A/C AMP. .

1. Turn ignition switch OFF and connect combination meter connector.
2. Turn ignition switch ON.
3. Check voltage signal between combination meter harness connector M24 terminal 22 (BR/Y) and ground with simple oscilloscope of CONSULT-II.
   Fig 3: Combination Meter Harness Connector M24 Terminal 22 Oscilloscope Pattern

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 4: Checking Voltage Signal Between Combination Meter Harness Connector M24 Terminal 22 And Ground

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

OK or NG

• OK: Replace the unified meter and A/C amp. Refer to REMOVAL AND INSTALLATION OF UNIFIED METER AND A/C AMP. .
• NG: Replace the combination meter. Refer to COMBINATION METER .

1. Turn ignition switch OFF.
2. Disconnect combination meter and unified meter and A/C amp. connectors.
3. Check continuity between combination meter harness connector M24 terminal 21 (L/W) and unified meter and A/C amp. harness connector M49 terminal 9 (L/W).
   Fig 5: Checking Continuity Between Combination Meter Harness Connector M24 Terminal 21 And Unified Meter And A/C Amp. Harness Connector M49 Terminal 9

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

   Continuity should exist. 

4. Check continuity between combination meter harness connector M24 terminal 21 (L/W) and ground.

   Continuity should not exist. 

OK or NG

• OK: GO TO  7.
• NG: Repair harness or connector.

1. Connect combination meter connector.
2. Turn ignition switch ON.
3. Check voltage between unified meter and A/C amp. harness connector M49 terminal 9 (L/W) and ground.

   Approx. 5 V 

   Fig 6: Checking Voltage Between Unified Meter & A/C AMP Harness Connector M49 Terminal 9 & Ground

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

OK or NG

• OK: GO TO  8.
• NG: Replace the combination meter. Refer to COMBINATION METER .

1. Turn ignition switch OFF and connect unified meter and A/C amp. connector.
2. Turn ignition switch ON.
3. Check voltage signal between combination meter harness connector M24 terminal 21 (L/W) and ground with simple oscilloscope of CONSULT-II.
   Fig 7: Combination Meter Harness Connector M24 Terminal 21 Oscilloscope Pattern

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 8: Checking Voltage Signal Between Combination Meter Harness Connector M24 Terminal 21 And Ground

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

OK or NG

• OK: Replace the combination meter. Refer to COMBINATION METER .
• NG: Replace the unified meter and A/C amp. Refer to REMOVAL AND INSTALLATION OF UNIFIED METER AND A/C AMP. .