Driver Information System: Diagnosis Nissan Maxima A34

Wiring Diagrams and Trouble Diagnosis

When you read wiring diagrams, refer to the following

1. Refer to «HOW TO READ WIRING DIAGRAMS»(ref-233642-S29809225742006052600000) .
2. Refer to «POWER SUPPLY ROUTING CIRCUIT»(ref-233661-S18989168572006052600000) for power distribution circuit.

When you perform trouble diagnosis, refer to the following

1. Refer to «HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES»(ref-233642-S38338795302006052600000) .
2. Refer to «HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT»(ref-233642-S21861505242006052600000) .

Scheme 747

SELF-DIAGNOSIS FUNCTION

1. Odo/trip meter segment and A/T indicator segment operation can be checked in self-diagnosis mode.
2. Meters/gauges can be checked in self-diagnosis mode.

Scheme 748

Scheme 749

Scheme 750

1. Turn ignition switch ON, and switch the odo/trip meter to "trip A" or "trip B". NOTE: If the diagnosis function is activated with the trip meter A displayed, the mileage on the trip meter A will indicate 0000.0 miles, but the actual trip mileage will be retained. (Trip B operates the same way.)
2. Turn ignition switch OFF.
3. While pushing the odo/trip meter switch, turn ignition switch ON again.
4. Make sure the trip meter displays "0000.0".
5. Push the odo/trip meter switch at least 3 times within 5 seconds.
6. All the segments on the odo/trip meter and A/T indicator illuminate, and simultaneously the low-fuel warning lamp indicator illuminates. At this time, the unified meter control unit is turned to diagnosis mode. NOTE: If any of the segments are not displayed, replace the combination meter.
7. Push the odo/trip meter switch. Each meter/gauge should indicate (Scheme 750)while pushing odo/trip meter switch. (At this time, the low-fuel warning lamp goes off.)

How to Proceed With Trouble Diagnosis

1. Confirm the symptom or customer complaint.
2. Perform diagnosis according to diagnosis flow. Refer to «DIAGNOSIS FLOW»(ref-233665-S12811232712006052600000) .
3. According to the symptom chart, repair or replace the cause of the symptom.
4. Does the meter operate normally? If so, go to 5 . If not, go to 2 .
5. Inspection End.

Scheme 751

1. CHECK SELF-DIAGNOSTIC RESULTS OF UNIFIED METER AND A/C AMP. Start engine. Select "METER A/C AMP" on CONSULT-II, and perform self-diagnosis of unified meter and A/C amp. Refer to «CONSULT-II FUNCTION (METER A/C AMP)»(ref-233665-S27807864272006052600000) . After erasing the self-diagnosis result, perform self-diagnosis again. Self-diagnostic results content No malfunction detected: GO TO 2 . Malfunction detected: Go to «SYMPTOM CHART 2»(ref-233665-S41688109772006052600000) .
2. CHECK WARNING LAMP ILLUMINATION Turn ignition switch ON. Make sure warning lamps (such as malfunction indicator lamp and oil pressure warning lamp) illuminate. Do warning lamps illuminate? YES: GO TO 3 . NO: Check ignition power supply system of combination meter. Refer to «POWER SUPPLY AND GROUND CIRCUIT INSPECTION»(ref-233665-S37337278312006052600000) .
3. CHECK SELF-DIAGNOSIS OPERATION OF COMBINATION METER Perform combination meter self-diagnosis. Refer to «SELF-DIAGNOSIS FUNCTION»(ref-233665-S17017846572006052600000) . Does self-diagnosis function operate? YES: GO TO 4 . NO: Check combination meter power supply and ground circuit. Refer to «POWER SUPPLY AND GROUND CIRCUIT INSPECTION»(ref-233665-S37337278312006052600000) .
4. CHECK ODO/TRIP METER OPERATION Check segment display status of odo/trip meter. Is the display normal? YES: GO TO 5 . NO: Replace the combination meter. Refer to «COMBINATION METER»(ref-233659-S36449423402006052600000) .
5. CHECK LOW-FUEL WARNING LAMP ILLUMINATION CONFIRMATION During low-fuel warning lamp check, confirm illumination of low-fuel warning lamp. CONDITION OF ODO/TRIP METER SWITCH DESCRIPTION Condition of odo/trip meter switch Low-fuel warning lamp Pushed Does not illuminate. Released Illuminates. OK or NG OK: GO TO 6 . NG: Replace the combination meter. Refer to «COMBINATION METER»(ref-233659-S36449423402006052600000) .
6. CHECK COMBINATION METER CIRCUIT Check indication of each meter/gauge in self-diagnosis mode. OK or NG OK: Go to «SYMPTOM CHART 1»(ref-233665-S29184546732006052600000) . NG: Replace the combination meter. Refer to «COMBINATION METER»(ref-233659-S36449423402006052600000) .

Scheme 752

Scheme 753

Scheme 754

Scheme 755

Scheme 756

Scheme 757

Scheme 758

Scheme 759

Scheme 760

Scheme 761

1. CHECK FUSE Check for blown combination meter and unified meter and A/C amp. fuses. Refer to «WIRING DIAGRAM - METER»(ref-233665-S12691042632006052600000) . OK or NG OK: GO TO 2 . NG: If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to «POWER SUPPLY ROUTING CIRCUIT»(ref-233661-S18989168572006052600000) .
2. CHECK POWER SUPPLY CIRCUIT Disconnect combination meter connector M24 and unified meter and A/C amp. connectors M50 and M89. Check voltage between combination meter harness connector terminals and ground. Check voltage between unified meter and A/C amp. harness connector terminals and ground. OK or NG OK: GO TO 3 . NG: Check the following. Harness for open or short between combination meter and fuse Harness for open or short between unified meter and A/C amp. and fuse
3. CHECK GROUND CIRCUIT Check continuity between combination meter harness connector terminals and ground. Check continuity between unified meter and A/C amp. harness connector terminals and ground. OK or NG OK: Inspection End. NG: Repair harness or connector.

Symptom Chart 1

SYMPTOM/POSSIBLE CAUSES

Scheme 762

Scheme 763

Scheme 764

Scheme 765

Scheme 766

Scheme 767

1. CHECK CONTINUITY BETWEEN COMBINATION METER AND UNIFIED METER AND A/C AMP. Disconnect combination meter connector M24 and unified meter and A/C amp. connector M50. Check continuity between combination meter harness connector M24 terminal 20 (BR) and unified meter and A/C amp. harness connector M50 terminal 26 (BR). Continuity should exist . Check continuity between combination meter harness connector M24 terminal 20 (BR) and ground. Continuity should not exist . OK or NG OK: GO TO 2 . NG: Repair harness or connector.
2. CHECK VOLTAGE OF COMBINATION METER Connect combination meter connector. Turn ignition switch ON. Check voltage between combination meter harness connector M24 terminal 20 (BR) and ground. Battery voltage should exist. OK or NG OK: GO TO 3 . NG: Replace combination meter, refer to «REMOVAL AND INSTALLATION OF COMBINATION METER»(ref-233665-S36601244132006052600000) .
3. CHECK UNIFIED METER AND A/C AMP. OUTPUT SIGNAL Turn ignition switch OFF. Connect unified meter and A/C amp. connector. Check voltage signal between combination meter harness connector M24 terminal 20 (BR) and ground with simple oscilloscope of CONSULT-II. OK or NG OK: Replace the combination meter. Refer to «COMBINATION METER»(ref-233659-S36449423402006052600000) . NG: GO TO 4 .
4. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS Perform the ABS actuator and electric unit (control unit) self-diagnosis. With traction control but without VDC system, refer to «SELF-DIAGNOSIS»(ref-233669-S08017209832006052600000) . Without traction control system, refer to «SELF-DIAGNOSIS»(ref-233669-S08688104732006052600000) . With VDC system, refer to «SELF-DIAGNOSIS»(ref-233669-S17606601712006092900000) . OK or NG OK: Replace the unified meter and A/C amp. Refer to «REMOVAL AND INSTALLATION OF UNIFIED METER AND A/C AMP.»(ref-233665-S26086829982006052600000) . NG: Check the applicable parts.

Scheme 768

Scheme 769

1. CHECK UNIFIED METER AND A/C AMP. OUTPUT SIGNAL Start engine and select "METER A/C AMP" on CONSULT-II. Using "TACHO METER" on the data monitor, compare the value of data monitor with tachometer pointer of combination meter. OK or NG OK: GO TO 2 . NG: Replace the combination meter. Refer to «COMBINATION METER»(ref-233659-S36449423402006052600000) .
2. CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL Select "ENGINE" on CONSULT-II. Using "ENG SPEED" on the data monitor, print out the CONSULT-II screen when the engine is idling. Select "METER A/C AMP" on CONSULT-II. Using "TACHO METER" on the data monitor, compare the value of data monitor of the idling speed with that of the "ENG SPEED". OK or NG OK: Perform ECM self-diagnosis. Refer to «SELF-DIAG RESULTS MODE»(ref-233647-S02512738922006052600000) . NG: Replace the unified meter and A/C amp. Refer to «REMOVAL AND INSTALLATION OF UNIFIED METER AND A/C AMP.»(ref-233665-S26086829982006052600000) .

Scheme 770

Scheme 771

1. CHECK UNIFIED METER AND A/C AMP. OUTPUT SIGNAL Start engine and select "METER A/C AMP" on CONSULT-II. Using "W TEMP METER" on the data monitor, compare the value of data monitor with water temperature gauge pointer of combination meter. WATER TEMPERATURE GAUGE POINTER REFERENCE VALUE CHART Water temperature gauge pointer Reference value of data monitor °C (°F) (Approx.) Hot 130 (266) Middle 70-105 (158-221) Cold 50 (122) OK or NG OK: GO TO 2 . NG: Replace the combination meter. Refer to «COMBINATION METER»(ref-233659-S36449423402006052600000)
2. CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL Select "ENGINE" on CONSULT-II. Using "COOLAN TEMP/S" on the data monitor, print out the CONSULT-II screen. Select "METER A/C AMP" on CONSULT-II. Using "W TEMP METER" on the data monitor, compare the value of data monitor with that of the "COOLAN TEMP/S". OK or NG OK: Perform ECM self-diagnosis. Refer to «SELF-DIAG RESULTS MODE»(ref-233647-S02512738922006052600000) . NG: Replace the unified meter and A/C amp. Refer to «REMOVAL AND INSTALLATION OF UNIFIED METER AND A/C AMP.»(ref-233665-S26086829982006052600000)

Fuel Level Sensor Signal Inspection 1

The following symptoms do not indicate a malfunction.

Fuel Level Sensor Signal Inspection 2

The following symptoms do not indicate a malfunction.

1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to «SYSTEM DESCRIPTION»(ref-233665-S21933433132006052600000) .
3. Perform the preliminary check. Refer to «PRELIMINARY CHECK»(ref-233665-S30177283312006052600000) .
4. Start engine.
5. Select "METER A/C AMP" on CONSULT-II, and perform self-diagnosis of unified meter and A/C amp. Refer to «CONSULT-II FUNCTION (METER A/C AMP)»(ref-233665-S27807864272006052600000) . When no malfunction is detected, go to step 7 . When malfunction is detected, go to «DISPLAY ITEM LIST»(ref-233665-S03776621872006052600000) .
6. After erasing the self-diagnostic results, perform self-diagnosis again. When no malfunction is detected, go to «SYMPTOM CHART 2»(ref-233665-S41688109772006052600000) .
7. Check symptom and repair or replace the cause of malfunction.
8. Does the warning chime operate properly? If so, go to 9 . If not, go to 5 .
9. Inspection End.

Scheme 772

Scheme 773

Scheme 774

Scheme 775

1. CHECK FUSE Refer to «WIRING DIAGRAM - CHIME»(ref-233665-S24278981532006052600000) . OK or NG OK: GO TO 2 . NG: If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to «POWER SUPPLY ROUTING CIRCUIT»(ref-233661-S18989168572006052600000) .
2. CHECK POWER SUPPLY CIRCUIT Disconnect BCM connector M18 and M19. Check voltage between BCM harness connector terminals and ground. OK or NG OK: GO TO 3 . NG: Check harness for open between BCM and fuse.
3. CHECK GROUND CIRCUIT Turn ignition switch OFF. Check continuity between BCM harness connector M19 terminal 52 (B), and ground. Continuity should exist. OK or NG OK: Inspection End. NG: Repair harness or connector.

Active Test Item

CONSULT-II ACTIVE TEST ITEM SPECIFICATION