Generators & Regulators: Other Infiniti I35 II

No Charging Voltage Or Diode Ripple Not Detected

1. Is charging lamp on with the ignition switch in the ON position? If yes, then go to next step. If no, then go to «DIAGNOSTIC PROCEDURE 1»(ref-161607-S11135860912004042000000) under ON-VEHICLE TESTING. Repair if needed and if okay, then replace alternator.
2. Is charging lamp on with engine running at idle? If yes, then go to next step. If no, then go to «DIAGNOSTIC PROCEDURE 2»(ref-161607-S22063398642004042000000) under ON-VEHICLE TESTING. Repair if needed and if okay, then replace alternator.
3. Is charging lamp on with engine running at 3000 RPM? If yes, then go to next step. If no, then go to «DIAGNOSTIC PROCEDURE 1»(ref-161607-S11135860912004042000000) under ON-VEHICLE TESTING. If needed repair and if okay then replace the alternator.
4. Check alternator drive belt tension. Repair if needed and if okay then replace the alternator.

Low Charging Voltage

1. Go to «DIAGNOSTIC PROCEDURE 2»(ref-161607-S22063398642004042000000) under ON-VEHICLE TESTING. Repair as needed and okay then go to next step.
2. Check alternator drive belt tension. Repair as needed and if okay then replace alternator.

High Charge Voltage

Go to DIAGNOSTIC PROCEDURE 3 under ON-VEHICLE TESTING. Repair as needed and if okay then replace alternator.

ROTOR

Using a DVOM, check for continuity between rotor slip rings. Ensure continuity is present. Replace rotor assembly if continuity is not present. Check for continuity between any rotor slip ring and rotor core. Continuity should not be present. Replace rotor assembly if continuity is present. Ensure slip ring outer diameter exceeds minimum specification. See SLIP RING MINIMUM OUTER DIAMETER table.

SLIP RING MINIMUM OUTER DIAMETER

STATOR

Using a DVOM, check for continuity between stator core leads. Ensure continuity is present. If continuity is not present, replace stator. Check for continuity between stator core and each stator lead. Continuity should not be present. If continuity is present, replace grounded stator.

DIODES

Note. Separate stator and diode assembly by unsoldering connecting wires. Use just enough heat to melt solder. Excessive heat will damage diodes.

Using DVOM, connect positive lead to positive diode plate, and negative lead to any diode terminal. Reverse test leads. Continuity should exist in only one direction. Repeat test procedure for each remaining diode. If continuity exists in both directions, or continuity does not exist in either direction, replace entire diode assembly.

BRUSHES

Inspect brushes for free movement in holder. Clean brush holder if necessary. Check brushes for cracks and wear. Check brush springs for corrosion or damage. Ensure brushes are not worn beyond minimum length (limit mark scribed on brush). If brushes do not have scribed minimum length mark, ensure brush length exceeds minimum specification. See MINIMUM BRUSH LENGTH table.

MINIMUM BRUSH LENGTH