Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnosis Procedure
Perform diagnosis under the condition that engine cannot start by the following procedure.
- Remove fuel pump fuse.
- Crank or start the engine (where possible) until the fuel pressure is released.
- CHECK FUSIBLE LINK
Check that the following fusible link is not blown.
Terminal No. Signal name Fusible link No. 2 Battery power supply A (225 A) Is the fusible link blown?
YES
Replace the blown fusible link after repairing the affected circuit if a fusible link is blown.
NO
GO TO STEP 2 .
- CHECK "B" TERMINAL CIRCUIT
- Turn ignition switch OFF.
- Check that starter motor "B" terminal connection is clean and tight.
- Check voltage between starter motor "B" terminal and ground.FOR NISMO RS MODELS
Terminals Voltage (Approx.) (+) (-) Starter motor "B" terminal Terminal E59 2 Ground Battery voltage EXCEPT FOR NISMO RS MODELSTerminals Voltage (Approx.) (+) (-) Starter motor "B" terminal Terminal F11 2 Ground Battery voltage
Is the inspection result normal?
YES
GO TO STEP 3 .
NO
Check harness between battery and starter motor for open circuit.
- CHECK BATTERY CABLE CONNECTION STATUS (VOLTAGE DROP TEST)
- Shift selector lever to "P" or "N" position. (CVT models)
Keep depressing clutch pedal fully. (M/T models)
- Check voltage between battery positive terminal and starter motor "B" terminal.
FOR NISMO RS MODELSTerminals Condition Voltage (Approx.) (+) (-) Starter motor
"B" terminalTerminal Battery positive terminal E59 2 When the ignition switch is in START position Less than
0.5 VEXCEPT FOR NISMO RS MODELSTerminals Condition Voltage (Approx.) (+) (-) Starter motor
"B" terminalTerminal Battery positive terminal F11 2 When the ignition switch is in START position Less than
0.5 VIs the inspection result normal?
YES
GO TO STEP 4 .
NO
Check harness between the battery and the starter motor for poor continuity.
- Shift selector lever to "P" or "N" position. (CVT models)
- CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST)
- Shift selector lever to "P" or "N" position. (CVT models)
Keep depressing clutch pedal fully. (M/T models)
- Check voltage between starter motor case and battery negative terminal.
Terminals Condition Voltage (Approx.) (+) (-) Starter motor case Battery negative terminal When the ignition switch is in START position Less than 0.2 V Is the inspection result normal?
YES
"B" terminal circuit is OK. Further inspection is necessary. Refer to WORK FLOW (WITH GR8-1200 NI) or WORK FLOW (WITHOUT GR8-1200 NI) .
NO
Check the starter motor case and ground for poor continuity.
- Shift selector lever to "P" or "N" position. (CVT models)
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.