Suzuki Grand Vitara 2011 Manual page 264

1A-195 Engine General Information and Diagnosis: For Petrol Engine Model
DTC Troubleshooting
NOTE
Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to
"Precautions for DTC Troubleshooting: For Petrol Engine Model".
Step
1 Was "Engine and Emission Control System Check"
performed?
2 Throttle actuator circuit check
1) Disconnect connectors from electric throttle body
assembly and ECM with ignition switch turned OFF.
2) Check for proper connection of electric throttle body
assembly and ECM connectors at "BLU/YEL" wire,
"BLU/RED" wire, "C37-45" and "C37-44" terminals.
"BLU/YEL"
"BLU/RED"
"BLK"
3) Turn ON ignition switch.
4) Measure voltage between "BLU/YEL" wire terminal of
electric throttle body assembly connector and engine
ground, between "BLU/RED" wire terminal of electric
throttle body assembly connector and engine ground.
Is voltage 0 V?
3 Throttle actuator circuit check
1) Turn OFF ignition switch.
2) Measure resistance between "BLU/YEL" wire terminal of
electric throttle body assembly connector and engine
ground, between "BLU/RED" wire terminal of electric
throttle body assembly connector and engine ground.
Is resistance infinity?
4 Throttle actuator circuit check
1) Check throttle actuator referring to "Throttle Actuator
(Motor) Check" under "Electric Throttle Body Assembly
On-Vehicle Inspection: For Petrol Engine Model in
Section 1C".
Is check result satisfactory?
Action
For J20 engine
"RED"
"GRN"
"WHT"
"BLK"
For M16 engine
"GRN"
"RED"
"BLU/YEL"
"WHT"
"BLU/RED"
Yes
Go to Step 2.
Go to Step 3.
I5JB0A110042-01
I5JB0A110043-01
Go to Step 4.
Substitute a known-
good ECM and recheck.
No
Go to "Engine and
Emission Control
System Check: For
Petrol Engine Model".
"BLU/YEL" wire and/or
"BLU/RED" wire is
shorted to power circuit.
"BLU/YEL" wire and/or
"BLU/RED" wire is
shorted to ground
circuit.
Replace electric throttle
body assembly.