Engine Symptom Diagnosis - Suzuki Grand Vitara 2011 Manual

Engine Symptom Diagnosis

Perform troubleshooting referring to the followings when ECM has detected no DTC and no abnormality has been
found in "Visual Inspection: For Petrol Engine Model" and "Engine Basic Inspection: For Petrol Engine Model".
Condition
Hard starting (Engine
cranks OK)
Engine General Information and Diagnosis: For Petrol Engine Model 1A-52
Possible cause
Faulty spark plug
Leaky high-tension cord (for M16
engine)
Loose connection or disconnection of
high-tension cord(s) or lead wire(s) (for
M16 engine)
Faulty ignition coil
Dirty or clogged fuel hose or pipe
Malfunctioning fuel pump
Air drawn in through intake manifold
gasket or throttle body gasket
Faulty electric throttle body assembly
Faulty accelerator pedal position (APP)
sensor assembly
Faulty ECT sensor or MAF sensor
Faulty ECM
Low compression
Poor spark plug tightening or faulty
gasket
Compression leak from valve seat
Correction / Reference Item
"Spark Plug Inspection: For Petrol Engine
Model in Section 1H"
"High-Tension Cord Inspection (For M16
Engine): For Petrol Engine Model in Section
1H"
"High-Tension Cord Removal and Installation
(For M16 Engine): For Petrol Engine Model in
Section 1H"
"Ignition Coil Assembly (Including ignitor)
Inspection: For Petrol Engine Model in Section
1H"
"Fuel Pressure Check: For Petrol Engine
Model"
"Fuel Pressure Check: For Petrol Engine
Model"
"Electric Throttle Body Assembly On-Vehicle
Inspection: For Petrol Engine Model in Section
1C"
"Accelerator Pedal Position (APP) Sensor
Assembly Inspection: For Petrol Engine Model
in Section 1C"
"Engine Coolant Temperature (ECT) Sensor
Inspection: For Petrol Engine Model in Section
1C" or "Mass Air Flow (MAF) and Intake Air
Temperature (IAT) Sensor Inspection: For
Petrol Engine Model in Section 1C"
"Compression Check: For M16A Engine with
VVT in Section 1D" or "Compression Check:
For J20 Engine in Section 1D"
"Spark Plug Removal and Installation: For
Petrol Engine Model in Section 1H"
"Valves and Valve Guides Inspection: For J20
Engine in Section 1D" or "Valves and Valve
Guides Inspection: For M16A Engine with VVT
in Section 1D".
S6JB0A1114010