(1) Inspection of rotor winding
a. Check resistance value of rotor winding
Set multimeter on R x 1 position, so two meter pens may
contact with two slip rings of rotor.
Standard: 2. 7 - 3. 1 ohm
b. Rotor bow inspection:
Standard: radial wobble is less than 0. 5 mm
If abnormal, correct or replace rotor.
(2) Stator winding inspection
a. Winding resistance value inspection
Set multimeter to R x 1 position, connect two meter pens
with any two leads of armature winding respectively. They
should be powered on, if resistance is infinitely great, there
is open circuit.
b. Winding earth inspection
Set multimeter on R x 1 position, connect a meter pen
with any lead of armature winding respectively, contact
one meter pen with stator core, if resistance is infinitely
great, it shows that armature winding insulation is good.
Otherwise repair or replace.Automobile Starting, Power Supply System -Charging system5-6IV. Alternator assembly replacement (MR479Q, MR479QA, MR481QA)1.Removel of Alternator
(1) Disconnect generator connector
(2) Loosen bolts A, B, C
(3) Loosen V-belt, remove generator.
2. Install generator assembly
Torque:
M 10 x 1.25 bolt 15 N.m
Tension adjustment of V-belt:
Deflection is about 10mm when belt middle part bears pressure of about 50N.Rotor winding inspection
Armature winding earth inspection
VI. Filling brake fuid and bleadAfter replace HECU, besides filling and blead as per routine brake system, also blead the secondary circuit of
HECU. Steps are as follows if fault diagnosis instrument is used for operation:MK-60 ABS system -Removal and Installation5-119Perform charging blead according to routine brake system until no bubble
appears in transparent rubber tube
Connect fault diagnosis instrument and diagnostic interface
Select function 04, press OK key to confirm
Step down brake pedal and keep rebound of hydraulic pump work pedal
Release the brake, loosen left and right front brake tongs venting screws,
press " " key
Step on brake pedal for 10 times, tighten up left and right front brake
tongs venting screws, press " " key
Repeat the above Step I II III for seven times, then press " " key.
Screen displays end of exhaust, press " " key to return to "function
selection" menu
Select function 06, press OK key to exit diagnosis modeEnd
Symptom
Poor idle speed, malfunction etc
Symptom
Fail to start5-125 Repair precautions:
1. according to engine requirement, electric fuel pumps with different flows are available, they have the same
appearance, mountable fuel pump may not be exactly suitable, during repair, part number of fuel pump used must
be consistent with original one, wrong replacement is not permitted;
2. in order to prevent fuel pump from damaging, please do not run it in dry state for a long time;
3. in case fuel pump needs to be replaced, please pay attention to clean fuel tank and pipeline and replace fuel
filter.
(2) Simple measuring method:
(Remove joint) turn digital multimeter to ohm position, connect two meter pens with fuel pump pins
respectively, measure internal resistance, it should not be zero or infinite (namely not in short circuit, open circuit
condition).
(Connect joint) connect fuel pressure gauge on sucker, start up engine, run the engine at idle speed, now fuel
pressure of engine should be about 260kPa; unplug fuel pressure regulator vacuum tube, now fuel pressure should
be about 300KPa.
11. Canister control valve
(1) Canister in fuel evaporation control system adsorbs oil vapor from oil tank until saturated. Electronic
control unit controls opening of canister control valve, fresh air and saturated fuel vapor in canister form
regeneration stream, which is led into engine intake pipe again. Electronic control unit changes duty ratio of pulsing
signal to canister control valve solenoid according to different operating conditions of engine, thus controls flow
of regeneration stream. In addition, this flow is also influenced by pressure difference at both ends.
Possible cause
Entering of foreign matter into valve inside results in
corrosion or poor leak tightness etc
Repair precautions:
1. To install, airflow direction must meet the specification;
2. when black granules inside valve body result in malfunction of control valve, and control valve needs to be
replaced, please check the condition of canister;
3. avoid water, oil etc liquids from entering valve as far as possible during repair;
4. in order to avoid transfer of solid-borne noise, it is recommended to install canister control valve suspending
on the hose or use soft rubber to fix.
(2) Simple measuring method:
(Remove joint) turn digital multimeter to ohm position, connect two meter pens with canister control valve pins
respectively, rated resistance at 20°C is 22 - 30 ohm.
12. Ignition coil
(1) When earthing channel of primary winding is connected, this primary winding is charged. Once ECU cut
off primary winding circuit, charging stops, high voltage is induced in secondary winding at the same time, so spark
plug discharges. Ignition coil ZSK 22 (both ends of 2 secondary windings are connected with a spark plug
respectively, so these two spark plugs ignite simultaneously.
Possible cause
Too heavy current leads to burnout, damaged by external force Repair precautions: it is prohibited to use "short circuit ignition testing method" to test ignition function, soEngine EFI System-
Engine EFI System
