Generators & Regulators - Except Pickup: Other

Generators & Regulators - Except Pickup: Other Mazda MX-5 NB

Charging System 3 illustrations ~230 words

BELT DEFLECTION

Measure belt deflection in center of longest pulley-to-pulley span. See the BELT DEFLECTION SPECIFICATIONS table. If belt deflection is not as specified, adjust as necessary.

Application				(1) Deflection - In. (mm)
Millenia
2.3L
New Belt				0.22-0.26 (5.5-6.5)
Used Belt				0.26-0.30 (6.5-7.5)
2.5L				(2)
MX-5 Miata
New Belt				0.22-0.28 (5.5-7.0)
Used Belt				0.24-0.30 (6.0-7.5)
Protege (3)
1.6L				0.31 (8.0)
1.8L				0.39 (10.0)
626
2.0L
New Belt				0.26-0.28 (6.5-7.0)
Used Belt				0.28-0.35 (7.0-9.0)
2.5L
With A/C
New Belt				0.22-0.26 (5.5-6.5)
Used Belt				0.26-0.30 (6.5-7.5)
Without A/C
New Belt				0.24-0.28 (6.0-7.0)
Used Belt				0.28-0.31 (7.0-8.0)
(1) With 22 lbs. (10 kg) applied to belt. (2) Tension is controlled by an automatic adjuster. No adjustment is required. If belt tensioner has reached its limit of travel, replace belt. (3) Standard dimension.

(1)	With 22 lbs. (10 kg) applied to belt.

(2)	Tension is controlled by an automatic adjuster. No adjustment is required. If belt tensioner has reached its limit of travel, replace belt.

(3)	Standard dimension.

BELT DEFLECTION SPECIFICATIONS

GENERATOR OUTPUT

Note. On Protege, generator output is controlled by PCM. If a generator no charge or overcharge condition exists, check PCM DTCs. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.

Millenia, MX-5 Miata, & 626

Connect an in-line ammeter (100-amp minimum) between generator terminal "B" connector and terminal "B" of wiring harness connector. (Scheme 6), (Scheme 7) or (Scheme 8). Turn headlights and all accessories on. Depress brake pedal. Operate engine at 2500-3000 RPM.
Measure and record generator output. See «GENERATOR MAXIMUM RATED OUTPUT»(ref-4925-S26980294182000072600000) table. If amperage is as specified, go to next step. If amperage is not as specified, repair or replace generator.
Turn off headlights and all accessories. Release brake pedal. Operate engine at 2500-3000 RPM and measure amperage under no-load condition. No-load amperage should be 5 amps or greater. If amperage is as specified, go to next step. If amperage is not as specified, repair or replace generator.
Operate engine at 2500-3000 RPM. Measure voltage between ground and terminals "S" and "L". If 14.1-14.7 volts does not exist, repair or replace generator. If 14.1-14.7 volts exists, generator output is okay.