DETAILED FLOW
Note. To ensure a complete and thorough diagnosis, the battery, starter motor and generator test segments must be done as a set from start to finish.
- DIAGNOSIS WITH MULTI-TASKING BATTERY AND ELECTRICAL DIAGNOSTIC STATION GR8-1200 NI Perform the starting system test with Multi-tasking battery and electrical diagnostic station GR8-1200 NI. For details and operating instructions, refer to the diagnostic station Instruction Information. Test result CRANKING NORMAL: GO TO 2. LOW VOLTAGE: GO TO 5 . CHARGE BATTERY: Perform the slow battery charging procedure. (Initial rate of charge is 10A for 12 hours.) Perform battery test again. Refer to the diagnostic station instruction information. REPLACE BATTERY: Before replacing battery, clean the battery cable clamps and battery posts. Perform battery test again. Refer to the diagnostic station instruction information. If second test result is "REPLACE BATTERY", then do so. Perform battery test again to confirm repair.
- CRANKING CHECK Check that the starter motor operates properly. Does the engine crank normally? YES: GO TO 3. NO: GO TO 4 .
- ENGINE START CHECK Check that the engine starts. Does the engine start? YES: Inspection End. NO: Perform further diagnosis of engine mechanical or engine control system. Refer to Engine Mechanical and Engine Control articles. Once resolved, perform battery test again.
- STARTER MOTOR ACTIVATION Check that the starter motor operates. Does the starter motor turn? YES: Check ring gear and starter motor drive pinion. Once resolved, perform battery test again. NO: GO TO 7 .
- COMPARISON BETWEEN ENGINE COOLANT AND CRANKING VOLTAGE Compare the engine coolant temperature and verify the cranking voltage is within specifications. MINIMUM SPECIFICATION OF CRANKING VOLTAGE REFERENCING COOLANT TEMPERATURE Engine coolant temperature [°C (°F)] Voltage [V] -30 to -20 (-22 to -4) 8.6 -19 to -10 (-2 to 14) 9.1 -9 to 0 (16 to 32) 9.5 More than 1 (More than 34) 9.9 Is the voltage less than the specified value? YES: GO TO 7 . NO: GO TO 6.
- STARTER OPERATION Check the starter operation. Does the starter motor turn smoothly? YES: Inspection End. NO: GO TO 7.
- "B" TERMINAL CIRCUIT INSPECTION Check "B" terminal circuit. Refer to " «DIAGNOSIS PROCEDURE»(ref-592034-S23364780682014010800000) ". Is "B" terminal circuit normal? YES: GO TO 8. NO: Repair as needed.
- "S" CONNECTOR CIRCUIT INSPECTION Check "S" connector circuit. Refer to " «DIAGNOSIS PROCEDURE»(ref-592034-S13142731622014010800000) ". Is "S" connector circuit normal? YES: GO TO 9. NO: Repair as needed.
- ENGINE ROTATION STATUS Check that the engine can be rotated by hand. Does the engine turn freely by hand? YES: Replace starter motor. NO: Perform further diagnosis of engine mechanical or powertrain mechanism. Once resolved, perform battery test again using Multi-tasking battery and electrical diagnostic station GR8-1200 NI. Refer to the diagnostic station Instruction information for proper testing procedures.
Scheme 21
Note. If any malfunction is found, immediately disconnect the battery cable from the negative terminal.
- CHECK ENGINE START Crank the engine and check that the engine starts. Does the engine start? YES: GO TO 2. NO: GO TO 3 .
- CHECK THAT THE STARTER MOTOR STOPS Check that the starter motor stops after starting the engine. Does the starter motor stop? YES: Inspection End. NO: Replace starter motor. Refer to " «REMOVAL AND INSTALLATION»(ref-592034-S15163134832014010800000) ".
- CHECK THAT THE ENGINE TURNS WHEN CRANKING Check that the engine turns when cranking. Does engine turn when cranking? YES: GO TO 4. NO: GO TO 5 .
- CHECK THE ENGINE SPEED WHEN CRANKING Check that the engine speed is not low when cranking. Does engine turn normally? YES: Check ignition/fuel system. NO: Check charge condition, corrosion and connection condition of the battery. Refer to " «HOW TO HANDLE BATTERY»(ref-592011-S38242666822014010800000) ".
- CHECK STARTER MOTOR ACTIVATION Check that the starter motor runs at cranking. Does starter motor turn? YES: Replace starter motor. Refer to " «REMOVAL AND INSTALLATION»(ref-592034-S15163134832014010800000) ". NO: GO TO 6.
- CHECK POWER SUPPLY CIRCUIT Check the following conditions: Fuse and fusible link Charge condition, corrosion and connection of the battery. Are these inspection results normal? YES: GO TO 7. NO: Repair as needed.
- CHECK STARTING SYSTEM WIRING Check the following: "B" terminal circuit. Refer to " «DIAGNOSIS PROCEDURE»(ref-592034-S23364780682014010800000) ". "S" terminal circuit. Refer to " «DIAGNOSIS PROCEDURE»(ref-592034-S13142731622014010800000) ". Are the inspection results normal? YES: Replace starter motor. Refer to " «REMOVAL AND INSTALLATION»(ref-592034-S15163134832014010800000) ". NO: Repair as needed.
Scheme 22
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are buckled or unbuckled.
Information necessary to service the system safely is included in the SRS AIRBAG (COUPE) and SEAT BELTS (COUPE) articles of this Service Information.
| WARNING | To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer. Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag Module, see the SRS AIRBAG . Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Information. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors. |
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
| WARNING | When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing serious injury. When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the battery, and wait at least 3 minutes before performing any service. |
Special Service Tool
The actual shapes of the tools may differ from those illustrated here.
Tool number (TechMate No.) Tool name Description - (-) Model GR8-1200 NI Multi-tasking battery and electrical diagnostic station Tests batteries, starting and charging systems and charges batteries. For operating instructions, refer to diagnostic station instruction information
Scheme 23
Commercial Service Tool
Tool name Description Power tool Loosening nuts, screws and bolts
Scheme 24
- Remove the battery and battery tray bracket. Refer to " «REMOVAL AND INSTALLATION (BATTERY)»(ref-592011-S06046231102014010800000) ".
- Disconnect the starter motor harness connectors.
- Remove the two starter motor bolts using power tools.
- Remove the starter motor.
Starter
| Application | QR25DE | |
|---|---|---|
| CVT Model | ||
| Manufacturer | Melco | |
| Model number (1) | M000TA0173 | |
| Type | Reduction gear type | |
| System voltage | 12V | |
| No-load | Terminal voltage | 11V |
| Current | Less than 90A | |
| Revolution | More than 2, 000 RPM | |
| (1) Always check with the Parts Department for the latest parts information. | ||
| (1) | Always check with the Parts Department for the latest parts information. |