A/C Control Module I/O Signal - Subaru Impreza 2004 Service Manual

4. A/C Control Module I/O Signal

A: ELECTRICAL SPECIFICATION
8
16 15 14 13 12 11
Content
Battery power supply (Memory
back-up)
IGN power supply
ACC power supply
A/C control module ground circuit
Sensor ground circuit
Ambient sensor
Evaporator sensor
Thermometer
Sunload sensor
Air mix door actuator
Air mix door actuator P.B.R.
Mode door actuator
Mode door actuator P.B.R.
Intake door FRS voltage
Intake door CIRC voltage
Blower fan relay
A/C relay
Illumination control signal
Rear window defogger
A/C Control Module I/O Signal
7 6 5 4 3 2 1
10 9
To A: B282
Connector &
Terminal No.
Battery voltage,
B1 — B12
13 — 14 (engine running)
Battery voltage (ignition switch ON),
A8 — B12
13 — 14 (engine running)
B2 — B12 Battery voltage, 0 (engine cranking), Battery voltage (engine running)
B12 — chas-
0 (ignition switch ON) — circuit constantly grounded to chassis
sis ground
B17 — chas-
0 (ignition switch ON) — circuit constantly grounded to chassis
sis ground
B9 — B17
B7 — B17 Approx. 5 (disconnect connector, and ignition switch ON)
B15 — B12
B16 — B17 Approx. 5 (disconnect connector, and ignition switch ON)
B5 — B1 Battery voltage (ignition switch ON)
A4 — B17 LAN connection
B6 — B17 Battery voltage (ignition switch ON)
A12 — B17 LAN connection
A15 — A7 Battery voltage (FRESH/RECIRC switch OFF)
A7 — A15 Battery voltage (FRESH/RECIRC switch ON)
B14 — body Battery voltage (ignition switch ON)
0 (ignition and A/C switches ON)
B3 — B12
Battery voltage (A/C switch OFF)
B10 — B20 Battery voltage (ignition and lighting switches ON)
A13 — B12 0 (ignition switch ON, rear window defogger switch ON)
AC(diag)-7
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
10 9 8 7 6 5 4 3 2
20 19 18 17 16 15 14 13 12 11
To B: B283
Signal (V)
1
AC-00735