CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
*1 | Main Body ECU (Multiplex Network Body ECU) | - | - |
Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.
Connect the driver side junction block assembly connectors.
Measure the voltage and resistance according to the value(s) in the table below.
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
A-32 (IG) - Body ground | Note - Body ground | Ignition power supply | Power switch on (IG) | 11 to 14 V |
Power switch off | Below 1 V | |||
A-31 (BECU) - Body ground | Note - Body ground | Auxiliary battery power supply | Power switch off | 11 to 14 V |
A-30 (ACC) - Body ground | Note - Body ground | ACC power supply | Power switch on (ACC) | 11 to 14 V |
Power switch off | Below 1 V | |||
A-11 (GND1) - Body ground | Note - Body ground | Ground | Always | Below 1 Ω |
Install the main body ECU (multiplex network body ECU).
Measure the voltage and pulse according to the value(s) in the table below.
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
P7-12 (HRY2) - Body ground | R - Body ground | No. 1 headlight ECU sub-assembly LH power supply | Power switch on (IG) | Below 1.5 V |
Power switch off | 6 V or higher | |||
3C-19 (HRLY) - Body ground*1 | V - Body ground | No. 1 headlight ECU sub-assembly RH power supply | Power switch on (IG) | Below 1.5 V |
Power switch off | 6 V or higher | |||
3C-20 (HRLY) - Body ground*2 | V - Body ground | No. 1 headlight ECU sub-assembly RH power supply | Power switch on (IG) | Below 1.5 V |
Power switch off | 6 V or higher | |||
P7-23 (CLTB) - P7-25 (CLTE) | V - G | Automatic light control sensor power supply output | Power switch on (IG) and light control switch in AUTO position | 11 to 14 V |
Power switch off | Below 1 V | |||
P7-24 (CLTS) - Body ground | GR - Body ground | Automatic light control sensor signal input | Power switch off | Below 1 V |
Power switch on (IG), material which blocks light used to cover and then uncover top of automatic light control sensor | Pulse generation (See waveform 1) |
|||
P7-16 (HEAD) - Body ground | SB - Body ground | Light control switch in HEAD position signal input | Light control switch in HEAD position | Below 1 V |
Light control switch not in HEAD position | 11 to 14 V | |||
P9-2 (MILE) - Body ground | BR - Body ground | Door outside handle sub-assembly (outside handle lights) signal output | Door outside handle sub-assembly (outside handle lights) off | Below 1 V |
Door outside handle sub-assembly (outside handle lights) on | 11 to 14 V |
*1: for LHD
*2: for RHD
Waveform 1
Item | Content |
---|---|
Terminal No. (Symbol) | P7-24 (CLTS) - Body ground |
Tool Setting | 2 V/DIV., 10 ms./DIV. |
Condition | Power switch on (IG), material which blocks light used to cover and then uncover top of automatic light control sensor |
Tech Tips
The communication waveform changes according to the surrounding brightness.
CHECK NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH
Disconnect the A36 No. 1 headlight ECU sub-assembly LH connector.
Measure the resistance and voltage according to the value(s) in the table below.
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
A36-4 (IG) - Body ground | G - Body ground | Ignition power supply | Power switch off | Below 1 V |
Power switch on (IG) | 11 to 14 V | |||
A36-13 (ECUB) - Body ground | G - Body ground | Power supply | Approximately 15 seconds elapsed after turning the power switch off | Below 1 V |
Power switch on (IG) or within approximately 15 seconds of power switch being turned off | 11 to 14 V | |||
A36-12 (GND) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
Reconnect the A36 No. 1 headlight ECU sub-assembly LH connector.
Tech Tips
Since the A36 No. 1 headlight ECU sub-assembly LH connector is a waterproof type connector, the voltage and pulses cannot be checked directly. The values listed are for reference only.
Since the B No. 1 headlight ECU sub-assembly LH connector is connected inside the headlight assembly, the voltage and pulses cannot be checked directly. The values listed are for reference only.
Measure the voltage and check of pulses according to the value(s) in the table below.
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
B-1 - B-10 | - | Clearance lights/daytime running lights power source | Clearance light and daytime running light off | Below 1 V |
Clearance light and daytime running light on | 11 to 14 V | |||
B-1 - B-16 | - | Clearance lights/daytime running lights control signal output | Clearance light and daytime running light off | Below 1 V |
Clearance light and daytime running light on | Pulse generation | |||
B-2 - B-3 | - | Low beam headlights/high beam headlights drive output | Low beam headlights and high beam headlights off | Below 1 V |
Low beam headlights or high beam headlights on | 40 to 48 V | |||
B-4 - B-14 | - | Low beam fan power source | Low beam headlights off | Below 1 V |
Low beam headlights on | 4.75 to 5.25 V | |||
B-15 - B-14 | - | Low beam fan control signal input | Low beam headlights off | Below 1 V |
Low beam headlights on | Pulse generation | |||
B-5 - B-6* | - | Cornering light drive output | Cornering light off | Below 1 V |
Cornering light on | 11 to 14 V | |||
B-8 - B-17 | - | Headlight leveling motor signal output | Power switch on (READY), when low beam headlights turn on, vehicle height not changed | Below 1 V |
Power switch on (READY), when low beam headlights turn on, vehicle height changed and maintained for more than 3 seconds | 1 to 14 V | |||
B-9 - B-17 | - | Headlight leveling motor power source | Power switch off | Below 1 V |
Power switch on (IG) | 11 to 14 V | |||
B-11 - B-19 | - | High beam headlights drive output | High beam headlights off | Below 1 V |
High beam headlights on | 11 to 14 V |
*: w/ Cornering Light
CHECK NO. 1 HEADLIGHT ECU SUB-ASSEMBLY RH
Disconnect the A37 No. 1 headlight ECU sub-assembly RH connector.
Measure the resistance and voltage according to the value(s) in the table below.
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
A37-4 (IG) - Body ground | R - Body ground | Ignition power supply | Power switch off | Below 1 V |
Power switch on (IG) | 11 to 14 V | |||
A37-13 (ECUB) - Body ground | R - Body ground | Power supply | Approximately 15 seconds elapsed after turning the power switch off | Below 1 V |
Power switch on (IG) or within approximately 15 seconds of power switch being turned off | 11 to 14 V | |||
A37-12 (GND) - Body ground | BR - Body ground | Ground | Always | Below 1 Ω |
Reconnect the A37 No. 1 headlight ECU sub-assembly RH connector.
Tech Tips
Since the A37 No. 1 headlight ECU sub-assembly RH connector is a waterproof type connector, the voltage and pulses cannot be checked directly. The values listed are for reference only.
Since the B No. 1 headlight ECU sub-assembly RH connector is connected inside the headlight assembly, the voltage and pulses cannot be checked directly. The values listed are for reference only.
Measure the voltage and check of pulses according to the value(s) in the table below.
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
B-1 - B-10 | - | Clearance lights/daytime running lights power source | Clearance light and daytime running light off | Below 1 V |
Clearance light and daytime running light on | 11 to 14 V | |||
B-1 - B-16 | - | Clearance lights/daytime running lights control signal output | Clearance light and daytime running light off | Below 1 V |
Clearance light and daytime running light on | Pulse generation | |||
B-2 - B-3 | - | Low beam headlights/high beam headlights drive output | Low beam headlights and high beam headlights off | Below 1 V |
Low beam headlights or high beam headlights on | 40 to 48 V | |||
B-4 - B-14 | - | Low beam fan power source | Low beam headlights off | Below 1 V |
Low beam headlights on | 4.75 to 5.25 V | |||
B-15 - B-14 | - | Low beam fan control signal input | Low beam headlights off | Below 1 V |
Low beam headlights on | Pulse generation | |||
B-5 - B-6* | - | Cornering light drive output | Cornering light off | Below 1 V |
Cornering light on | 11 to 14 V | |||
B-8 - B-17 | - | Headlight leveling motor signal output | Power switch on (READY), when low beam headlights turn on, vehicle height not changed | Below 1 V |
Power switch on (READY), when low beam headlights turn on, vehicle height changed and maintained for more than 3 seconds | 1 to 14 V | |||
B-9 - B-17 | - | Headlight leveling motor power source | Power switch off | Below 1 V |
Power switch on (IG) | 11 to 14 V | |||
B-11 - B-19 | - | High beam headlights drive output | High beam headlights off | Below 1 V |
High beam headlights on | 11 to 14 V |
*: w/ Cornering Light
CHECK COMBINATION METER ASSEMBLY
CHECK FORWARD RECOGNITION CAMERA
CHECK NO. 1 SEMICONDUCTOR POWER INTEGRATION ECU
CHECK NO. 3 SEMICONDUCTOR POWER INTEGRATION ECU