Suzuki 2000 Grand Vitara SQ625 Service Manual page 55

DTC P0120 (DTC No.21, 22) THROTTLE POSITION CIRCUIT MALFUNCTION
WIRING DIAGRAM
1. Throttle position sensor
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITION
Following conditions are detected for 5 sec.
continuously.
D Engine running
D Signal voltage low or high
DTC CONFIRMATION PROCEDURE
1) Connect scan tool to DLC with ignition switch OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool and run engine
at idle speed for 10 sec. or more.
3) Check DTC and pending DTC by using scan tool.
C51-3-13
D TP sensor circuit open or short
D TP sensor
D ECM (PCM)
ENGINE DIAGNOSIS (G16 / J20 ENGINES) 6-51
TROUBLE AREA