PARK ASSIST / MONITORING PARKING SUPPORT BRAKE SYSTEM TERMINALS OF ECU
CLEARANCE WARNING ECU ASSEMBLY
Disconnect the E51 clearance warning ECU assembly connector.
Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.
| Terminal No. (Symbol) | Terminal Description | Condition | Specified Condition |
|---|---|---|---|
| E51-1 (IG) - E51-31 (E) | IG source signal | Ignition switch off | Below 1 V |
| Ignition switch ON | 11 to 14 V*1
10.5 to 16 V*2 |
||
| E51-31 (E) - Body ground | Ground | Always | Below 1 Ω |
*1: w/o Stop and Start System
*2: w/ Stop and Start System
Reconnect the E51 clearance warning ECU assembly connector.
Measure the voltage and resistance and check for pulses according to the value(s) in the table below.
| Terminal No. (Symbol) | Terminal Description | Condition | Specified Condition |
|---|---|---|---|
| E51-2 (BOF) - E51-31 (E) | Power source for front sensor circuit | Ignition switch off | Below 1 V |
·
Ignition switch ON ·
Parking support brake system on |
11 to 14 V | ||
| E51-3 (E5) - E51-31 (E) | Ground for front clearance sonar | Always | Below 1 Ω |
| E51-4 (SOF) - E51-31 (E) | Front sensor communication signal (Front clearance sonar sensor) | ·
Ignition switch ON ·
Parking support brake system on ·
Shift lever in any position other than P or R ·
Vehicle speed is less than approximately 10 km/h (6 mph) |
Pulse generation
(Refer to waveform 1) |
| E51-9 (CBZ) - E51-8 (EF) | No. 1 clearance warning buzzer signal | Buzzer sounding | Pulse generation
(Refer to waveform 2) |
| E51-19 (BOR) - E51-31 (E) | Power source for rear sensor circuit | Ignition switch off | Below 1 V |
·
Ignition switch ON ·
Parking support brake system on |
11 to 14 V | ||
| E51-20 (E1) - E51-31 (E) | Ground for rear clearance sonar | Always | Below 1 Ω |
| E51-21 (SOR) - E51-31 (E) | Rear sensor communication signal (Rear clearance sonar sensor) | ·
Ignition switch ON ·
Parking support brake system on ·
Shift lever in R ·
Vehicle speed is less than approximately 10 km/h (6 mph) |
Pulse generation
(Refer to waveform 3) |
| E51-26 (BBZ) - E51-25 (ER) | No. 2 clearance warning buzzer signal | Buzzer sounding | Pulse generation
(Refer to waveform 2) |
Using an oscilloscope, check waveform 1.
Waveform 1 (Reference)
| Item | Content |
|---|---|
| Measurement terminal | E51-4 (SOF) - E51-31 (E) |
| Measurement setting | 1 V/DIV., 100 μs./DIV. |
| Condition | ·
Ignition switch ON ·
Parking support brake system on ·
Shift lever in any position other than P or R ·
Vehicle speed is less than approximately 10 km/h (6 mph) |
Using an oscilloscope, check waveform 2.
Waveform 2 (Reference)
| Item | Content |
|---|---|
| Measurement terminal | E51-9 (CBZ) - E51-8 (EF)
E51-26 (BBZ) - E51-25 (ER) |
| Measurement setting | 2 V/DIV., 500 μs./DIV. |
| Condition | Buzzer sounding |
- HINT:
-
The amplitude of the waveform changes according to the set volume.
Using an oscilloscope, check waveform 3.
Waveform 3 (Reference)
| Item | Content |
|---|---|
| Measurement terminal | E51-21 (SOR) - E51-31 (E) |
| Measurement setting | 1 V/DIV., 100 μs./DIV. |
| Condition | ·
Ignition switch ON ·
Parking support brake system on ·
Shift lever in R ·
Vehicle speed is less than approximately 10 km/h (6 mph) |
BLIND SPOT MONITOR SENSOR RH (A) (w/ Blind Spot Monitor System)
BLIND SPOT MONITOR SENSOR LH (B) (w/ Blind Spot Monitor System)