Suzuki 2000 Grand Vitara SQ625 Service Manual page 86

6-82 ENGINE DIAGNOSIS (G16 / J20 ENGINES)
DTC P0403 (DTC No.51) EXHAUST GAS RECIRCULATION CIRCUIT MALFUNCTION
WIRING DIAGRAM
1. Main fuse
2. Main relay
3. EGR valve
4. Fuse box
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITION
Low voltage is detected at EGR valve stepping motor
electrical circuit for specified time continuously.
(Circuit open or short).
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.
3) Start engine and run it for 10 sec.
4) Check DTC and pending DTC by using scan tool.
TROUBLE AREA
EGR valve (stepping motor) or its circuit
ECM (PCM)