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Alternator Terminal Identification

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Note

Manufactures will have the same terminal identification with a very different function .

Always Confirm with Manufactures Specifications. 

 

A: Battery Sense

AC: Neutral or Star

AS: Voltage sense, external

B+: Battery

B-: Earth

BSS: ECU communication

BSS1: ECU communication

BSS2: ECU communication

BVS: From Alternator to ECU, Charge data (alt load)

C: Charge control from ECU

COM: Bi directional communication. Alternator to ECU charge data (alt load). ECU to Alternator charge control.

D: Dummy terminal

D-: Negative

D+: warning light

D: Driver. From ECU to Alternator, Charge control. Mazda vehicles. Mitsubishi and Hitachi Alternators

DF: Field

DFM: From Alternator to ECU, Charge data (alt load)

E: Earth

EXC: Triode Warning light

F: Field

F: Field Monitor, From Alternator to ECU, Charge data (alt load) Mitsubishi Alternators

F1: Field

F2: Field

FLD: Field

FR: From Alternator to ECU, Charge data (alt load)

G: From ECU to Alternator, Charge control. Mitsubishi Alternators

I: Ignition

IG: Ignition

LI: load indicator or Battery sense

LIN1: Bi directional communication. Alternator to ECU charge data (alt load). ECU to Alternator charge control.

LIN2: Bi directional communication. Alternator to ECU charge data (alt load). ECU to Alternator charge control.

M: Monitor. From Alternator to ECU, Charge data (alt load)

N/S: Neutral or Star

N: Neutral or Star

P: Output from Stator (Tachometer)

P: Phase, Feed back from Alternator Rectifier to ECU (Charge Data) Mazda vehicles. Mitsubishi and Hitachi Alternators

PCM: Pulse Code Modulation

PCM: Power Train Control Module (ECU)

R: Ignition

RC: Regulator Control. From ECU to Alternator, Charge control

RLO: From ECU to Alternator, Charge control

RS: Remote Sense. From Alternator to ECU, Charge data (alt load)

RVC: From ECU to Alternator, Charge control

S: Battery sense

S: Star input (Autolite) Star voltage comes out of an alternator terminal thought the vehicles wiring loom and back into the alternator regulator S terminal (Alt will not charge without this link Ref ANA003)

SIG: From ECU to Alternator, Charge control

WL: warning Light

W: Output from Stator (Tachometer)