TERMINALS OF ECU
*a | Component without harness connected (Skid Control ECU [Brake Actuator Assembly]) |
- | - |
Terminal No. (Symbol) | Terminal Description |
---|---|
1 (GND2) | Pump motor ground |
2 | - (Not used) |
3 (EXI) | 4WD detection switch (Transfer shift actuator assembly) input*1, *4 |
A.D.D. position switch (Differential motor actuator assembly) signal input*1, *5 | |
4 | - (Not used) |
5 (EXI4)*1 | L4 detection switch (Transfer shift actuator assembly) input |
6 | - (Not used) |
7 (STP2) | Stop light switch assembly input |
8 | - (Not used) |
9 | - (Not used) |
10 (CANL) | CAN communication line L |
11 | - (Not used) |
12 (IG1) | ECU power supply input |
13 (BM) | Motor relay power supply |
14 (SP1) | Speed signal output for speedometer |
15 (RR-) | Rear wheel speed RH (-) signal input |
16 (RR+) | Rear wheel speed RH (+) power supply output |
17 (FL-) | Front wheel speed LH (-) signal input |
18 (FL+) | Front wheel speed LH (+) power supply output |
19 | - (Not used) |
20 (TMVC)*2, *3, *6 | Neutral position switch power supply |
21 (TME2)*2, *3, *6 | Neutral position switch signal input |
22 (CANH) | CAN communication line H |
23 | - (Not used) |
24 (TS) | Sensor check input |
25 (GND1) | Skid control ECU (Brake actuator assembly) ground |
26 (STPO) | Stop light control relay (STOP/CDS FAN Relay) output |
27 (HDCS)*2 | Downhill assist control switch input |
28 (RL-) | Rear wheel speed LH (-) signal input |
29 (RL+) | Rear wheel speed LH (+) power supply output |
30 (FR-) | Front wheel speed RH (-) signal input |
31 (FR+) | Front wheel speed RH (+) power supply output |
32 (TMN)*2, *3, *6 | Neutral position switch signal output |
33 (CSW) | VSC OFF switch input |
34 | - (Not used) |
35 (STP) | Stop light control relay (STOP/CDS FAN Relay) input |
36 | - (Not used) |
37 | - (Not used) |
38 (+BS) | Solenoid relay power supply |
*1: for 4WD
*2: w/ Downhill Assist Control
*3: for Manual Transmission
*4: w/o A.D.D. Actuator
*5: w/ A.D.D. Actuator
*6: w/o Stop and Start System
TERMINAL INSPECTION
Disconnect the A4 connector and measure the voltage or resistance on the wire harness side.
*a | Front view of wire harness connector (to Skid Control ECU [Brake Actuator Assembly]) |
- | - |
Tech Tips
Voltage cannot be measured with the connector connected to the skid control (brake actuator assembly) as the connector is watertight.
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
A4-1 (GND2) - Body ground | W-B - Body ground | Pump motor ground | Always | Below 1 Ω |
A4-3 (EXI) - Body ground*1 | W - Body ground | 4WD detection switch (Transfer shift actuator assembly) input*6 |
|
11 to 14 V |
A.D.D. position switch (Differential motor actuator assembly) signal input*7 | ||||
A4-5 (EXI4) - Body ground*1 | G - Body ground*2 | L4 detection switch (Transfer shift actuator assembly) input |
|
11 to 14 V |
SB - Body ground*3 | ||||
A4-7 (STP2) - Body ground | L - Body ground | Stop light switch assembly input | Stop light switch assembly on → off (Brake pedal depressed → released) |
8 to 14 V → Below 1.5 V |
A4-12 (IG1) - Body ground | V - Body ground*3 | ECU power supply input | Ignition switch ON | 10.5 to 16 V*8 |
L - Body ground*2 | 11 to 14 V*9 | |||
A4-13 (BM) - Body ground | R - Body ground | Motor relay power supply | Always | 11 to 14 V |
A4-14 (SP1) - Body ground | Y - Body ground | Speed signal output for speedometer | Ignition switch ON | 11 to 14 V |
A4-20 (TMVC) - Body ground*4, *5, *9 | B - Body ground | Neutral position switch power supply |
|
4.5 to 5.5 V |
A4-25 (GND1) - Body ground | W-B - Body ground | Skid control ECU (Brake actuator assembly) ground | Always | Below 1 Ω |
A4-26 (STPO) - Body ground | P - Body ground | Stop light control relay (STOP/CDS FAN Relay) output | Ignition switch ON | 11 to 14 V |
A4-27 (HDCS) -Body ground*5 | SB - Body ground | Downhill assist control switch input | Downhill assist control switch on → off | Below 1 Ω → 10 kΩ or higher |
A4-32 (TMN) - A4-21 (TME2)*4, *5, *9 | P - R | Neutral position switch signal |
|
2.7 to 4.3 V |
|
0.7 to 1.9 V | |||
A4-33 (CSW) - Body ground | GR - Body ground | VSC OFF switch input | VSC OFF switch pressed and held → released | Below 1 Ω → 10 kΩ or higher |
A4-35 (STP) - Body ground | L - Body ground | Stop light control relay (STOP/CDS FAN Relay) input | Stop light switch assembly on → off (Brake pedal depressed → released) |
8 to 14 V → Below 1.5 V |
A4-38 (+BS) - Body ground | B - Body ground | Solenoid relay power supply | Always | 11 to 14 V |
*1: for 4WD
*2: for 1GD-FTV RHD and 2GD-FTV RHD
*3: for all except 1GD-FTV RHD and 2GD-FTV RHD
*4: for Manual Transmission
*5: w/ Downhill Assist Control
*6: w/o A.D.D. Actuator
*7: w/ A.D.D. Actuator
*8: w/ Stop and Start System
*9: w/o Stop and Start System