Honda Odyssey Service Manual: Rear A/C Control Panel   Inputs and Outputs (With Climate Control)

1

GRY

ILL+

Power source for illumination

With lighting switch ON: battery voltage

2

LT GRN

IG2

IG2 power supply

With ignition switch ON (II): battery voltage

3

ORN

BUS-DATA

Front-Rear communication

???

4

BLK

GND

Ground for rear A/C control panel (G701)

Less than 0.2 V at all times

5

RED

ILL- (LED)

Detects illumination control signal

With combination light switch ON: changed voltage (depending on dashlights brightness controller)