Honda Accord 2008 Manual page 2138

07/11/02 09:30:22 61TA0000_220_0108
Self-diagnostic Function (On-board diagnosis)
By connecting the HDS to the data link connector (DLC), the HDS can retrieve the diagnostic information from the
driver's MICU via a diagnostic line called K-LINE. The K-LINE is separated from the CAN lines, and connected to the
CAN related ECUs. The driver's MICU is a gateway between the HDS and B-CAN related ECUs, and sends B-CAN
diagnostic information to the HDS. When doing a function test with the HDS, the HDS sends an output signal through
the K-LINE to the driver's MICU. The driver's MICU either relays the request to another ECU, or commands the
function its self.
＊０１
GAUGE CONTROL MODULE
CANH CANL
F CAN (500 kbps) −
ECM/PCM
K LINE −
VSA MODULATOR −
CONTROL UNIT
SRS UNIT
1
NAVIGATION UNIT*
TPMS
CONTROL UNIT
STEERING
ANGLE SENSOR
YAW RATE LATERAL −
ACCELERATION
SENSOR
K LINE
DATA LINK
CONNECTOR
HDS
*1 : With navigation system
*2 : With premium audio system
− −
B CAN B CAN
HI LO
B CAN (125 kbps) −
DRIVER'S
MICU
PASSENGER'S
MICU
CLIMATE CONTROL
UNIT
−
IMMOBILIZER KEYLESS
CONTROL UNIT
DOOR MULTIPLEX
CONTROL UNIT
HANDSFREELINK
1
CONTROL UNIT*
2
AUDIO UNIT*
−
(cont'd)
22-105