Suzuki 2000 Grand Vitara SQ625 Service Manual page 161

6-1-50 ENGINE (H25 ENGINE)
TABLE A-5 ECM (PCM) POWER AND GROUND CIRCUIT CHECK
MIL DOES NOT LIGHT AT IGNITION SWITCH ON AND ENGINE DOES NOT START THOUGH IT IS
CRANKED UP.
WIRING DIAGRAM
1. Battery
2. Ignition switch
3. Main fuse
4. Main relay
TERMINAL ARRANGEMENT OF ECM (PCM) COUPLER VIEWED FROM HARNESS SIDE
CIRCUIT DESCRIPTION
When the ignition switch is turned ON, the main relay turns ON and the main power is supplied to ECM (PCM).