Suzuki 2000 Grand Vitara SQ625 Service Manual page 49

DTC P0100 (DTC No.33, 34) MASS AIR FLOW CIRCUIT MALFUNCTION
WIRING DIAGRAM
1. Main fuse
2. Main relay
3. Mass air flow sensor
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITION
Following conditions are detected for 5 sec.
continuously.
D Engine running
D Less than 0.64 mA MAF sensor output current
continues for 100 msec or more than 3 sec. after
ignition switch ON and more than 4.90 mA MAF
sensor output current continues for 100 msec.
DTC CONFIRMATION PROCEDURE
NOTE:
Check to make sure that the following conditions are satisfied when using this DTC CONFIRMATION PRO-
CEDURE.
D Intake air temp.: –8_C, 18_F or higher
D Engine coolant temp.: –8 – 110_C (18 – 230_F)
D Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)
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 20 sec. or more.
3) Check DTC and pending DTC by using scan tool.
ENGINE DIAGNOSIS (G16 / J20 ENGINES) 6-45
TROUBLE AREA
D MAF sensor circuit open or short
D MAF sensor
D ECM (PCM)