Subaru Legacy IV (2008 year). Manual - part 903
ABS(diag)-11
Control Module I/O Signal
ABS (DIAGNOSTICS)
*1: Measure the I/O signal voltage after disconnecting the connector from the ABSCM&H/U terminal.
Description
Terminal
No.
(+) — (–)
Input/Output signal
Measured value and measuring conditions
ABS wheel speed sensor
(Wheel speed sensor)
Front LH wheel
Power supply
16 — 15
4.5 — 16.5 V
Signal
1
5.9 — 16.8 mA: Rectangle waveform
Front RH wheel
Power supply
5 — 15
4.5 — 16.5 V
Signal
6
5.9 — 16.8 mA: Rectangle waveform
Rear LH wheel
Power supply
2 — 15
4.5 — 16.5 V
Signal
17
5.9 — 16.8 mA: Rectangle waveform
Rear RH wheel
Power supply
3 — 15
4.5 — 16.5 V
Signal
4
5.9 — 16.8 mA: Rectangle waveform
CAN communication line (+)
26
2.5 — 1.5 V pulse signal
CAN communication line (–)
11
3.5 — 2.5 V pulse signal
Valve relay power supply *1
14 — 15
10 — 15 V
Motor relay power supply *1
13 — 15
10 — 15 V
G sensor
Power supply
24 — 10
4.75 — 5.25 V
Ground
10
—
Output
21 — 10
2.1 — 2.5 V when the vehicle is on level surface
Stop light switch *1
20 — 15
1.5 V or less when the stop light is OFF; otherwise,
10 — 15 V when the stop light is ON.
ABS warning light
22 — 15
After turning the ignition switch to ON, 10 — 15 V during
1.5 seconds and 1.5 V or less after 1.5 seconds passed.
Brake warning light (EBD warning light)
8 — 15
After turning the ignition switch to ON, 10 — 15 V during
1.5 seconds and 1.5 V or less after 1.5 seconds passed.
Subaru Select Monitor
7 — 15
1.5 V or less when no data is received. 0
mo 12 V pulse
(in communication)
Power supply *1
18 — 15
10 — 15 V when the ignition switch is ON.
Grounding line
15
—
Vehicle speed output signal
23 — 15
0
mo 5 V pulse