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

1I-2 Starting System:

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
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Diagnostic Information and Procedures

Possible cause
Transmission range sensor is not in P or
N, or not adjusted (A/T)
Malfunction of clutch pedal position
switch (M/T)
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
Faulty starting motor control relay
Faulty ECM and its circuit
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
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Correction / Reference Item
Shift in P or N, or adjust sensor.
Adjust or replace.
Recharge battery.
Replace battery.
Retighten or replace.
Retighten.
Tighten or replace.
Replace.
Retighten.
Repair.
Replace magnetic switch.
Repair or replace.
Repair.
"Main Relay, Fuel Pump Relay, Starting Motor
Control Relay and Throttle Actuator Control
Relay Inspection: in Section 1C".
"Inspection of ECM and its Circuits: in Section
1A".
Recharge battery.
Replace battery.
Retighten.
Replace magnetic switch.
Repair or replace.
Replace.
Replace armature.
Replace.
Repair.
S5JB0A1904001