TERMINAL INSPECTION
*a | Component without harness connected (Skid Control ECU Assembly) |
- | - |
Measure the voltage or resistance between each terminal or between each terminal and body ground.
Connect the GTS to the DLC3, and check the communication condition with the skid control ECU assembly.
Using an oscilloscope, check the pulse generated between each terminal or between each terminal and body ground.
Note
Inspection should be performed from the back of the connector with the connector connected to the skid control ECU assembly.
The voltage between the terminals of the brake actuator assembly may become 0 V due to the fail-safe function when the brake warning light / yellow (minor malfunction) comes on (malfunctioning).
Tech Tips
Inspect the skid control ECU assembly from the wire harness side while the connector is connected.
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
A8-1 (GND) - Body ground | W-B - Body ground | Skid control ECU assembly ground | Power switch off | Below 1 Ω |
A8-2 | - | - (Not used) | - | - |
A8-3 (BS01) - Body ground | G - Body ground | Master cut solenoid 1 power supply output | Approximately 1.5 seconds after turning power switch on (IG) | 8.8 to 14 V |
A8-4 (SMC1) - Body ground | R - Body ground | Master cut solenoid 1 output | Brake pedal depressed approximately 1.5 seconds after turning power switch on (IG) | Below 1.5 V |
A8-5 | - | - (Not used) | - | - |
A8-6 (FRR+) - Body ground | LG - Body ground | Front reduction linear solenoid RH (+) output | Power switch on (IG), after approximately 1.5 seconds brake pedal depressed → released | Pulse generation (see waveform 1) |
A8-7 (FRR-) - Body ground | L - Body ground | Front reduction linear solenoid RH (-) output | Approximately 1.5 seconds after turning power switch on (IG) | Below 1.5 V |
A8-8 (E) - Body ground | P - Body ground | Pressure sensor 1 ground | Power switch off | Below 1 Ω |
A8-9 (VCM) - Body ground | L - Body ground | Pressure sensor 1 power supply output | Power switch on (IG) | 4.75 to 5.25 V |
A8-10 (SG1) - Body ground | Shielded - Body ground | Pressure sensor 1 shield ground | Power switch off | Below 1 Ω |
A8-11 (MR1) - Body ground | V - Body ground | ABS motor relay 1 power supply output | Approximately 1.5 seconds after turning power switch on (IG) | 8.8 to 14 V |
A8-12 (SG3) - Body ground | Shielded - Body ground | Pressure sensor 3 shield ground | Power switch off | Below 1 Ω |
A8-13 (GS1) - Body ground | Shielded - Body ground | Front speed sensor RH shield ground | Power switch off | Below 1 Ω |
A8-14 (CTY) - Body ground | G - Body ground | Front door courtesy light switch assembly LH input | Driver door closed → open | Pulse generation (see waveform 2) → Below 1.5 V |
A8-15 | - | - (Not used) | - | - |
A8-16 (RLR-) - Body ground | P - Body ground | Rear reduction linear solenoid LH (-) output | Approximately 1.5 seconds after turning power switch on (IG) | Below 1.5 V |
A8-17 (RLR+) - Body ground | GR - Body ground | Rear reduction linear solenoid LH (+) output | Brake pedal depressed approximately 1.5 seconds after turning power switch on (IG) | Pulse generation (see waveform 3) |
A8-18 (PRL) - Body ground | G - Body ground | Rear wheel cylinder pressure sensor LH signal input | Power switch on (IG), brake pedal released | 0.3 to 0.7 V |
A8-19 | - | - (Not used) | - | - |
A8-20 | - | - (Not used) | - | - |
A8-21 (PAC1) - Body ground | W - Body ground | Accumulator pressure sensor input | Power switch on (IG), after pump motor operates and stops by pedal operation | 3 to 4.7 V |
A8-22 (FR+) - Body ground | G - Body ground | Front speed sensor RH power supply output | Power switch on (IG) | 8 to 14 V |
A8-23 (FR-) - Body ground | R - Body ground | Front speed sensor RH input | While driving at approximately 30 km/h (19 mph) | Pulse generation (see waveform 4) |
A8-24 (R1-) - Body ground | L - Body ground | ABS motor relay 1 output | Power switch on (IG), pump motor in operation | Below 1.5 V |
A8-25 | - | - (Not used) | - | - |
A8-26 (RLA+) - Body ground | R - Body ground | Rear addition linear solenoid LH (+) output | Brake pedal depressed approximately 1.5 seconds after turning power switch on (IG) | Pulse generation (see waveform 3) |
A8-27 (RLA-) - Body ground | G - Body ground | Rear addition linear solenoid LH (-) output | Approximately 1.5 seconds after turning power switch on (IG) | Below 1.5 V |
A8-28 | - | - (Not used) | - | - |
A8-29 (MTT) - Body ground | V - Body ground | ABS motor relay test input | Power switch on (IG), ABS motor relay off → on | Below 2 V → 5 V or higher |
A8-30 (PMC1) - Body ground | R - Body ground | Master cylinder pressure sensor 1 input | Power switch on (IG), brake pedal released | 0.3 to 0.7 V |
A8-31 (PCK1) - Body ground | Y - Body ground | Pressure sensor 1 stuck check output | Power switch on (IG) | Below 1.2 V |
A8-32 (PFR) - Body ground | B - Body ground | Front wheel cylinder pressure sensor RH signal input | Power switch on (IG), brake pedal released | 0.3 to 0.7 V |
A8-33 (FRA-) - Body ground | W - Body ground | Front addition linear solenoid RH (-) output | Approximately 1.5 seconds after turning power switch on (IG) | Below 1.5 V |
A8-34 (FRA+) - Body ground | B - Body ground | Front addition linear solenoid RH (+) output | Brake pedal depressed approximately 1.5 seconds after turning power switch on (IG) | Pulse generation (see waveform 3) |
A9-1 (GND3) - Body ground | BR - Body ground | Skid control ECU assembly ground 3 | Power switch off | Below 1 Ω |
A9-2 (IG1) - Body ground | G - Body ground | IG1 power source input | Power switch on (IG) | 11 to 14 V |
A9-3 (GND2) - Body ground | W-B - Body ground | Skid control ECU assembly ground 2 | Power switch off | Below 1 Ω |
A9-4 (+BI1) - Body ground | W - Body ground | +B power source 1 | Always | 11 to 14 V |
A9-5 (+BI3) - Body ground | LG - Body ground | +B power source 3 | Always | 11 to 14 V |
A9-6 (LBL) - Body ground | L - Body ground | Brake fluid level warning switch (Brake master cylinder reservoir assembly) input | Brake fluid level warning switch (Brake master cylinder reservoir assembly) off → on | 4 to 8 V → Below 1.5 V |
A9-7 (CBI1) - Body ground | B - Body ground | Brake control power supply with bracket assembly 1 power supply input | Power switch on (IG) | 8.8 to 14 V |
A9-8 (CA1H) - Body ground | W - Body ground | CAN communication line 1 | Check for DTC using the GTS | CAN communication DTC is not output |
A9-9 (CA1L) - Body ground | LG - Body ground | CAN communication line 1 | Check for DTC using the GTS | CAN communication DTC is not output |
A9-10 (CA2H) - Body ground | W - Body ground | CAN communication line 2 | Check for DTC using the GTS | CAN communication DTC is not output |
A9-11 (CA2L) - Body ground | R - Body ground | CAN communication line 2 | Check for DTC using the GTS | CAN communication DTC is not output |
A9-12 | - | - (Not used) | - | - |
A9-13 | - | - (Not used) | - | - |
A9-14 (STP2) - Body ground | W - Body ground | Stop light signal input | Stop light switch assembly on → off (Brake pedal depressed → released) |
8 to 14 V → Below 1.5 V |
A9-15 | - | - (Not used) | - | - |
A9-16 | - | - (Not used) | - | - |
A9-17 (GS2) - Body ground | Shielded - Body ground | Rear speed sensor LH shield ground | Power switch off | Below 1 Ω |
A9-18 | - | - (Not used) | - | - |
A9-19 (CSW) - Body ground | B - Body ground | VSC OFF switch (No. 2 combination switch assembly) input | VSC OFF switch (No. 2 combination switch assembly) held on → off (Released) | Below 1 Ω → 10 kΩ or higher |
A9-20 (ENA) - Body ground | V - Body ground | Brake control power supply with bracket assembly signal output | Approximately 1.5 seconds after turning power switch on (IG) | Pulse generation (see waveform 5) |
A9-21 | - | - (Not used) | - | - |
A9-22 (SP1) - Body ground | LG - Body ground | Speedometer signal output | While driving at approximately 20 km/h (12 mph) | Pulse generation (see waveform 6) |
A9-23 | - | - (Not used) | - | - |
A9-24 | - | - (Not used) | - | - |
A9-25 | - | - (Not used) | - | - |
A9-26 | - | - (Not used) | - | - |
A9-27 | - | - (Not used) | - | - |
A9-28 | - | - (Not used) | - | - |
A9-29 | - | - (Not used) | - | - |
A9-30 | - | - (Not used) | - | - |
A9-31 | - | - (Not used) | - | - |
A9-32 | - | - (Not used) | - | - |
A9-33 | - | - (Not used) | - | - |
A9-34 (RL+) - Body ground | R - Body ground | Rear speed sensor LH power supply output | Power switch on (IG) | 8 to 14 V |
A9-35 (RL-) - Body ground | G - Body ground | Rear speed sensor LH input | While driving at approximately 30 km/h (19 mph) | Pulse generation (see waveform 4) |
A10-1 (GND5) - Body ground | W-B - Body ground | Skid control ECU assembly ground 5 | Power switch off | Below 1 Ω |
A10-2 (CBI2) - Body ground | SB - Body ground | Brake control power supply with bracket assembly 2 power supply input | Power switch on (IG) | 8.8 to 14 V |
A10-3 (GND4) - Body ground | W-B - Body ground | Skid control ECU assembly ground 4 | Power switch off | Below 1 Ω |
A10-4 (STPO) - Body ground | Y - Body ground | Stop light signal output | Power switch on (IG) | 11 to 14 V |
A10-5 (IG2) - Body ground | B - Body ground | IG2 power source input | Power switch on (IG) | 11 to 14 V |
A10-6 | - | - (Not used) | - | - |
A10-7 | - | - (Not used) | - | - |
A10-8 (SKG) - Body ground | W - Body ground | Brake pedal stroke sensor assembly ground | Power switch off | Below 1 Ω |
A10-9 | - | - (Not used) | - | - |
A10-10 (VCSK) - Body ground | B - Body ground | Brake pedal stroke sensor assembly power supply output | Power switch on (IG) | 4.5 to 5.5 V |
A10-11 (FSS) -Body ground | Shielded - Body ground | Front speed sensor LH shield ground | Power switch off | Below 1 Ω |
A10-12 (CANL) - Body ground | BR - Body ground | CAN communication line | Check for DTC using the GTS | CAN communication DTC is not output |
A10-13 (CANH) - Body ground | P - Body ground | CAN communication line | Check for DTC using the GTS | CAN communication DTC is not output |
A10-14 (HZRI) - Body ground | SB - Body ground | Brake hold switch input | Brake hold switch held on → off (Released) | Below 1 Ω → 10 kΩ or higher |
A10-15 | - | - (Not used) | - | - |
A10-16 (STP) - Body ground | R - 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 |
A10-17 | - | - (Not used) | - | - |
A10-18 | - | - (Not used) | - | - |
A10-19 | - | - (Not used) | - | - |
A10-20 (SKS) - Body ground | G - Body ground | Brake pedal stroke sensor assembly 1 signal input | Power switch on (IG), brake pedal released | 0.8 to 1.2 V |
A10-21 | - | - (Not used) | - | - |
A10-22 (SKS2) - Body ground | R - Body ground | Brake pedal stroke sensor assembly 2 signal input | Power switch on (IG), brake pedal released | 3.8 to 4.2 V |
A10-23 | - | - (Not used) | - | - |
A10-24 | - | - (Not used) | - | - |
A10-25 | - | - (Not used) | - | - |
A10-26 | - | - (Not used) | - | - |
A10-27 | - | - (Not used) | - | - |
A10-28 | - | - (Not used) | - | - |
A10-29 | - | - (Not used) | - | - |
A10-30 (FAIL) - Body ground | L - Body ground | Brake control power supply with bracket assembly signal input | Approximately 1.5 seconds after turning power switch on (IG) | Pulse generation (see waveform 7) |
A10-31 (FL+) - Body ground | B - Body ground | Front speed sensor LH power supply output | Power switch on (IG) | 8 to 14 V |
A10-32 (FL-) - Body ground | W - Body ground | Front speed sensor LH input | While driving at approximately 30 km/h (19 mph) | Pulse generation (see waveform 4) |
A10-33 | - | - (Not used) | - | - |
A10-34 | - | - (Not used) | - | - |
A10-35 | - | - (Not used) | - | - |
A11-1 (RRR-) - Body ground | Y - Body ground | Rear reduction linear solenoid RH (-) output | Approximately 1.5 seconds after turning power switch on (IG) | Below 1.5 V |
A11-2 (RRR+) - Body ground | L - Body ground | Rear reduction linear solenoid RH (+) output | Brake pedal depressed approximately 1.5 seconds after turning power switch on (IG) | Pulse generation (see waveform 3) |
A11-3 (GND6) - Body ground | W-B - Body ground | Skid control ECU assembly ground 6 | Power switch off | Below 1 Ω |
A11-4 (SMC2) - Body ground | SB - Body ground | Master cut solenoid 2 output | Brake pedal depressed approximately 1.5 seconds after turning power switch on (IG) | Below 1.5 V |
A11-5 (+BI2) - Body ground | Y - Body ground | +B power source 2 | Always | 11 to 14 V |
A11-6 (+BI4) - Body ground | L - Body ground | +B power source 4 | Always | 11 to 14 V |
A11-7 (BS02) - Body ground | B - Body ground | Master cut solenoid 2 power supply output | Approximately 1.5 seconds after turning power switch on (IG) | 8.8 to 14 V |
A11-8 (FLR+) - Body ground | W - Body ground | Front reduction linear solenoid LH (+) output | Power switch on (IG), after approximately 1.5 seconds brake pedal depressed → released | Pulse generation (see waveform 1) |
A11-9 (FLR-) - Body ground | P - Body ground | Front reduction linear solenoid LH (-) output | Approximately 1.5 seconds after turning power switch on (IG) | Below 1.5 V |
A11-10 (SG2) - Body ground | Shielded - Body ground | Pressure sensor 2 shield ground | Power switch off | Below 1 Ω |
A11-11 (EXO) - Body ground* | B - Body ground | No. 3 Semiconductor Power integration ECU output (for emergency brake signal) | Power switch on (IG) | 11 to 14 V |
A111-12 (RSS) -Body ground | Shielded - Body ground | Rear speed sensor RH shield ground | Power switch off | Below 1 Ω |
A11-13 | - | - (Not used) | - | - |
A11-14 (R2-) - Body ground | P - Body ground | ABS motor relay 2 output | Power switch on (IG), pump motor in operation | Below 1.5 V |
A11-15 (E2) - Body ground | L - Body ground | Pressure sensor 2 ground | Power switch off | Below 1 Ω |
A11-16 (VCM2) - Body ground | W - Body ground | Pressure sensor 2 power supply output | Power switch on (IG) | 4.75 to 5.25 V |
A11-17 (MR2) - Body ground | GR - Body ground | ABS motor relay 2 power supply output | Approximately 1.5 seconds after turning power switch on (IG) | 8.8 to 14 V |
A11-18 (FLA-) - Body ground | V - Body ground | Front addition linear solenoid LH (-) output | Approximately 1.5 seconds after turning power switch on (IG) | Below 1.5 V |
A11-19 (FLA+) - Body ground | B - Body ground | Front addition linear solenoid LH (+) output | Brake pedal depressed approximately 1.5 seconds after turning power switch on (IG) | Pulse generation (see waveform 3) |
A11-20 | - | - (Not used) | - | - |
A11-21 (RR-) - Body ground | L - Body ground | Rear speed sensor RH input | While driving at approximately 30 km/h (19 mph) | Pulse generation (see waveform 4) |
A11-22 (RR+) - Body ground | P - Body ground | Rear speed sensor RH power supply output | Power switch on (IG) | 8 to 14 V |
A11-23 (PFL) - Body ground | B - Body ground | Front wheel cylinder pressure sensor LH signal input | Power switch on (IG), brake pedal released | 0.3 to 0.7 V |
A11-24 (PRR) - Body ground | R - Body ground | Rear wheel cylinder pressure sensor RH signal input | Power switch on (IG), brake pedal released | 0.3 to 0.7 V |
A11-25 | - | - (Not used) | - | - |
A11-26 (RRA+) - Body ground | LG - Body ground | Rear addition linear solenoid RH (+) output | Brake pedal depressed approximately 1.5 seconds after turning power switch on (IG) | Pulse generation (see waveform 3) |
A11-27 (RRA-) - Body ground | W - Body ground | Rear addition linear solenoid RH (-) output | Approximately 1.5 seconds after turning power switch on (IG) | Below 1.5 V |
A11-28 (PMC2) - Body ground | Y - Body ground | Master cylinder pressure sensor 2 input | Power switch on (IG), brake pedal released | 0.3 to 0.7 V |
A11-29 (PCK2) - Body ground | G - Body ground | Pressure sensor 2 stuck check output | Power switch on (IG) | Below 1.2 V |
A11-30 | - | - (Not used) | - | - |
A11-31 | - | - (Not used) | - | - |
*: w/ Emergency Brake Signal
Waveform 1 (Reference)
Item | Content |
---|---|
Tester Connection | A8-6 (FRR+) - Body ground A11-8 (FLR+) - Body ground |
Tool Setting | 5 V/DIV., 50 ms./DIV. |
Vehicle Condition | Power switch on (IG), after approximately 1.5 seconds brake pedal depressed → released |
Tech Tips
Normal waveform is output only when +BI voltage is normal (11 to 14 V).
*a | Driver door closed |
*b | Driver door open |
Waveform 2 (Reference)
Item | Content |
---|---|
Tester Connection | A8-14 (CTY) - Body ground |
Tool Setting | 5 V/DIV., 10 ms./DIV. |
Vehicle Condition | Driver door closed → open |
Waveform 3 (Reference)
Item | Content |
---|---|
Tester Connection | A8-17 (RLR+) - Body ground A8-26 (RLA+) - Body ground A8-34 (FRA+) - Body ground A11-2 (RRR+) - Body ground A11-19 (FLA+) - Body ground A11-26 (RRA+) - Body ground |
Tool Setting | 5 V/DIV., 50 ms./DIV. |
Vehicle Condition | Brake pedal depressed approximately 1.5 seconds after turning power switch on (IG) |
Tech Tips
Normal waveform is output only when +BI voltage is normal (11 to 14 V).
Waveform 4 (Reference)
Item | Content |
---|---|
Tester Connection | A8-23 (FR-) - Body ground A9-35 (RL-) - Body ground A10-32 (FL-) - Body ground A11-21 (RR-) - Body ground |
Tool Setting | 0.5 V/DIV., 2 ms./DIV. |
Vehicle Condition | While driving at approximately 30 km/h (19 mph) |
Waveform 5 (Reference)
Item | Content |
---|---|
Tester Connection | A9-20 (ENA) - Body ground |
Tool Setting | 2 V/DIV., 50 ms./DIV. |
Vehicle Condition | Approximately 1.5 seconds after turning power switch on (IG) |
Waveform 6 (Reference)
Item | Content |
---|---|
Tester Connection | A9-22 (SP1) - Body ground |
Tool Setting | 5 V/DIV., 50 ms./DIV. |
Vehicle Condition | While driving at approximately 20 km/h (12 mph) |
Waveform 7 (Reference)
Item | Content |
---|---|
Tester Connection | A10-30 (FAIL) - Body ground |
Tool Setting | 5 V/DIV., 200 ms./DIV. |
Vehicle Condition | Approximately 1.5 seconds after turning power switch on (IG) |