Rear A/C Control Unit Inputs and Outputs

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 Honda Odyssey, 2016 Honda Odyssey, 2015 Honda Odyssey, 2014 Honda Odyssey, and 2013 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Rear A/C Control Unit Connector A (12P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

CONNECTOR A

CONNECTOR TERMINALS REFERENCE CHART

Cavity

Wire color

Terminal name

Description

Signal

PNK

M-HOT-Rr

Output to drive rear air mix control motor to HOT side

With ignition switch ON (II) and rear air mix control motor moving to HOT: battery voltage

BLU

M-HEAT-Rr

Outputs to drive rear mode control motor to HEAT side

With ignition switch ON (II) and rear mode control motor moving to HEAT: battery voltage

YEL

M-VENT-Rr

Outputs to drive rear mode control motor to VENT side

With ignition switch ON (II) and rear mode control motor moving to VENT: battery voltage

Not used

5⁽¹⁾

LT BLU

Teva-Rr

Detects rear evaporator temperature sensor signal

With ignition switch ON (II): about 1.0-4.0 V (depending on rear evaporator temperature)

ORN

AMD-P-Rr

Detects potentiometer signal of rear air mix control motor

With ignition switch ON (II): about 1.0-4.0 V (depending on rear air mix control motor position)

GRN

M-COOL-Rr

Output to drive rear air mix control motor to COOL side

With ignition switch ON (II) and rear air mix control motor moving to COOL: battery voltage

Not used

PUR

S5V

Outputs sensor 5 V

With ignition switch ON (II): about 5.0 V

Not used

BLK

SENS-COM

Sensor ground

Less than 0.2 V at all times

RED

MDD-P-Rr

Detects potentiometer signal of rear mode control motor

With ignition switch ON (II): about 1.5-4.0 V (depending on rear mode control motor position)

⁽¹⁾	With climate control

Fig 1: Identifying Rear A/C Control Unit Connector A (5P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

CONNECTOR B

CONNECTOR TERMINALS REFERENCE CHART

Cavity	Wire color	Terminal name	Description	Signal
1	LT GRN	IG2	IG2 power supply	With ignition switch ON (II): battery voltage
2	BLU	BLW-V-Rr	Feedback signal of power rear transistor drain voltage	With ignition switch ON (II): about 0 V-battery voltage (depending on rear blower motor speed)
3	BLK	GND	Ground for rear climate control unit (G652)	Less than 0.2 V at all times
4	WHT	BLW-G-Rr	Outputs rear power transistor gate voltage	With ignition switch ON (II) and fan control button OFF: less than 0.2 V With ignition switch ON (II) and fan control button ON: about 4.0 V-battery voltage (depending on rear blower motor control)
5	ORN	BUS-DATA	Front-Rear communication	--