Diagnostic Information And Procedures; Cranking System Symptom Diagnosis - Suzuki Grand Vitara 2011 Manual

1I-12 Starting System: For Diesel Engine Model

Cranking System Symptom Diagnosis

Possible symptoms due to starting system trouble would be as follows:
• Starting motor does not run (or runs slowly)
• Starting motor runs but fails to crank engine
• Abnormal noise is heard
Proper diagnosis must be made to determine exactly where the cause of each trouble lies.....in battery, wiring harness,
(including starting motor switch), starting motor or engine.
Do not remove motor just because starting motor does not run. Check the following items and narrow down scope of
possible causes.
1) Condition of trouble
2) Tightness of battery terminals (including ground cable connection on engine side) and starting motor terminals
3) Discharge of battery
4) Mounting of starting motor
Condition
Motor not running – No
operating sound of
magnetic switch
Motor not running –
Operating sound of
magnetic switch heard
Starting motor running,
but too slow (small
torque) – Battery and
wiring are satisfactory
Starting motor running,
but not cranking engine

Diagnostic Information and Procedures

Possible cause
Battery run down
Battery voltage too low due to battery
deterioration
Poor contact in battery terminal
connection
Loose grounding cable connection
Fuse set loose or blown off
Poor contacting action of ignition switch
and magnetic switch
Lead wire coupler loose in place
Open-circuit between ignition switch and
magnetic switch
Open-circuit in pull-in coil
Brushes are seating poorly or worn
down
Poor sliding or plunger and/or pinion
Battery run down
Battery voltage too low due to battery
deterioration
Loose battery cable connections
Burnt main contact point, or poor
contacting action of magnetic switch
Brushes are seating poorly or worn
down
Weakened brush spring
Burnt commutator
Layer short-circuit of armature
Crankshaft rotation obstructed
Insufficient contact of magnetic switch
main contacts
Layer short-circuit of armature
Disconnected, burnt or worn
commutator
Worn brushes
Weakened brush springs
Burnt or abnormally worn end bush
Worn pinion tip
Poor sliding of over-running clutch
Over-running clutch slipping
Worn teeth of ring gear
Correction / Reference Item
Recharge battery.
Replace battery.
Retighten or replace.
Retighten.
Tighten or replace.
Replace.
Retighten.
Repair.
Replace magnetic switch.
Repair or replace.
Repair.
Recharge battery.
Replace battery.
Retighten.
Replace magnetic switch.
Repair or replace.
Replace starting motor.
Replace starting motor.
Replace starting motor.
Repair.
Replace magnetic switch.
Replace starting motor.
Replace starting motor.
Replace starting motor.
Replace starting motor.
Replace starting motor.
Replace over-running clutch.
Repair.
Replace over-running clutch.
Replace flywheel (M/T).
S6JB0A1924001