Subaru 2004 LEGACY, Service Manual

Page: 335 / 609

VDC(diag)-13
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Control Module I/O Signal
Content
Terminal
No.
(+) — (
−
)
Input/Output signal
Measured value and measuring conditions
Power supply 14 — 6 When the ignition switch is ON, 10 — 15 V.
ABS wheel speed sen-
sor
Front LH wheel
Power
supply
41 — 6 4.5 — 16.5 V
Signal 25 5.9 — 16.8 mA: Rectangle waveform
Front RH wheel
Power
supply
22 — 6 4.5 — 16.5 V
Signal 21 5.9 — 16.8 mA: Rectangle waveform
Rear LH wheel
Power
supply
24 — 6 4.5 — 16.5 V
Signal 40 5.9 — 16.8 mA: Rectangle waveform
Rear RH wheel
Power
supply
23 — 6 4.5 — 16.5 V
Signal 38 5.9 — 16.8 mA: Rectangle waveform
Yaw rate & lateral G
sensor
Output (Lateral G sensor) 3 — 16 When the vehicle is on level, 2.35 — 2.65 V.
Power supply 30 — 16 When the ignition switch is ON, 8 — 16 V.
Output (Yaw rate sensor) 28 — 16
Waveform
<Ref. to VDC(diag)-15, WAVEFORM, MEASURE-
MENT, Control Module I/O Signal.>
Standard (Yaw rate sensor) 1 — 16 2.1 — 2.9 V
Test 2 — 16
5 — 1 V cycle for 40 ms pulse signal.
<Ref. to VDC(diag)-15, WAVEFORM, MEASURE-
MENT, Control Module I/O Signal.>
Ground 16 —
CAN communication line (+) 13 2.5 — 1.5 V pulse signal
CAN communication line (
−
) 29 3.5 — 2.5 V pulse signal
Valve relay power supply 5 — 6 When the ignition switch is ON, 10 — 15 V.
Motor relay power supply 9 — 10 When the ignition switch is ON, 10 — 15 V.
Pressure sensor
Power supply 27 — 12 When the ignition switch is ON, 4.75 — 5.25 V.
Output voltage 11 — 12 0.48 — 0.72 V (when releasing the brake pedal)
Ground 12 —
ABS warning light 35 — 6
After turning the ignition switch to ON, 10 — 15 V during
1.5 seconds and less than 1.5 V after 1.5 seconds
passed.
Brake warning light (EBD warning light) 20 — 6
After turning the ignition switch to ON, 10 — 15 V during
1.5 seconds and less than 1.5 V after 1.5 seconds
passed.
Stop light switch 37 — 6
Less than 1.5 V when the stop light is OFF; otherwise,
10 — 15 V when the stop light is ON.
Diagnosis connector 17 When the ignition switch is ON, 10 — 15 V.
Subaru Select Monitor 26 — 6 0
←→
12 V pulse (in communication)
Vehicle speed output signal 36 0
←→
5 V pulse
Ground 6 —