Suzuki Grand Vitara 2011 Manual page 191

DTC Detecting Condition and Trouble Area
Output voltage of throttle position sensor (sub) is less than 0.3 V for
specified time continuously.
(1 driving detection logic)
NOTE
When DTC P0122 and P0222 are indicated together, it is possible that "WHT" wire open circuit.
DTC Confirmation Procedure
1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Keep the accelerator pedal at idle position for 2 seconds.
4) Keep the accelerator pedal at fully depressed position for 2 seconds.
5) Repeat Step 3) and 4) for 3 times.
6) Check DTC.
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 position sensor and its circuit check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch, check "TP Sensor 2 Volt"
displayed on scan tool when accelerator pedal is idle
position and fully depressed.
Is displayed TP sensor value as described voltage in "Scan
Tool Data: For Petrol Engine Model"?
Engine General Information and Diagnosis: For Petrol Engine Model 1A-122
DTC detecting condition
Action
Trouble area
• Throttle position sensor (sub) circuit
• Electric throttle body assembly
• ECM
Yes
Go to Step 2.
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection in Section
00".
No
Go to "Engine and
Emission Control
System Check: For
Petrol Engine Model".
Go to Step 3.