Suzuki 2000 Grand Vitara SQ625 Service Manual page 124

SUZUKI
serial data
line
Body ground
ECM (PCM) ground
K line of ISO 9141
Data Link Connector (DLC)
DLC in compliance with SAE J1962 in its installation position, the
shape of connector and pin assignment.
K line of ISO 9141 is used for SUZUKI scan tool to communication
with ECM (PCM) and ABS control module. SUZUKI serial data line
is used for SUZUKI scan tool to communicate with an electronic
control units (Airbag SDM, etc.).
ENGINE (H25 ENGINE) 6-1-13