Toyota 1HZ Repair Manual

CH-12
CHARGING SYSTEM - Alternator
INSPECTION AND REPAIR OF ALTERNATOR
Rotor
1. INSPECT ROTOR FOR OPEN CIRCUIT
Using an ohmmeter, check that there is continuity between
the slip rings.
Standard resistance (cold): 12VType 2.7-3.1 Q
24 V Type 1.0-1.4Q
If there is no continuity, replace the rotor.
2. INSPECT ROTOR FOR GROUND
Using an ohmmeter, check that there is no continuity
between the slip ring and the rotor.
If there is continuity, replace the rotor.
3. INSPECT SLIP RINGS
(a) Check that the slip rings are not rough or scored.
If rough or scored, replace the rotor.
(b) Using vernier calipers, measure the slip ring diameters.
Standard diameter: 14.2-14.4 mm
(0.559-0.567 in.)
Minimum diameter: 12.8 mm (0.504 in.)
If the diameter is less than minimum, replace the rotor.
Stator (Drive End Frame)
1. INSPECT STATOR FOR OPEN CIRCUIT
Using an ohmmeter, check that there is continuity between
the coil leads.
If there is no continuity, replace the drive end frame
assembly.
2. INSPECT STATOR FOR GROUND
Using an ohmmeter, check that there is no continuity
between the coil leads and drive end frame.
If there is continuity, replace the drive end frame assembly.
No continuity
CH0803
Ohmmeter
Continuity
Ohmmeter
CH0806
CHOI 92
CH0783
No continuity
Ohmmeter
Continuity
CH0784
Ohmmeter

Toyota 1HZ Specifications

General

Fuel Type	Diesel
Maximum Power	96 kW (129 hp) at 3800 rpm
Firing Order	1-5-3-6-2-4
Aspiration	Naturally aspirated
Fuel System	Direct injection
Cooling System	Water-cooled
Displacement	4.2 L (4164 cc)
Maximum Torque	285 N·m (210 lb·ft) at 2200 rpm
Valvetrain	SOHC, 12 valves (2 per cylinder)