LIGHTING (EXT)  AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM  TERMINALS OF ECU  


CHECK HEADLIGHT LEVELING ECU ASSEMBLY


E101528N52
3.281,0.167 3.698,0.417 0.417,0.25 3.365,0.208 3.792,0.417 0.427,0.208 10 false A60

a.

Disconnect the A60 headlight leveling ECU assembly connector.


b.

Measure the voltage and resistance according to the value(s) in the table below.

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
A60-1 (IG) - Body ground L - Body ground IG power supply Ignition switch off Below 1 V
Ignition switch ON 11 to 14 V
A60-9 (E1) - Body ground W-B - Body ground Ground Always Below 1 Ω


c.

Connect the A60 headlight leveling ECU assembly connector.


d.

Measure the voltage, resistance and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
A60-3 (HDLP) - Body ground B - Body ground Low beam headlight signal input Low beam headlights on Below 1.5 V
Low beam headlights off 5 V or higher
A60-5 (INIT) - Body ground Y - Body ground Initialization signal input Terminals LVL and GND of DLC3 connected Below 1 V
Terminals LVL and GND of DLC3 not connected 4.5 to 5.5 V
A60-6 (WNG) - Body ground L - Body ground Warning message drive output Warning message displayed Below 1 V
Warning message not displayed 11 to 14 V
A60-10 (RH+) - Body ground Y - Body ground Headlight leveling motor RH power supply Ignition switch off Below 1 V
Ignition switch ON 11 to 14 V
A60-11 (LH+) - Body ground W-B - Body ground Headlight leveling motor LH power supply Ignition switch off Below 1 V
Ignition switch ON 11 to 14 V
A60-12 (SBR) - Body ground SB - Body ground Rear height control sensor sub-assembly power supply Ignition switch off Below 1 V
Ignition switch ON 4.75 to 5.25 V
A60-16 (SPDR) - Body ground V - Body ground Vehicle speed signal input Ignition switch ON, wheel being rotated Pulse generation
(See waveform 1)
A60-17 (RHT) - Body ground G - Body ground Headlight leveling motor RH operation signal input With low beam headlights on, vehicle height not changed Below 1 V
With low beam headlights on, vehicle height changed and maintained for more than 3 seconds 1.0 to 14.4 V
A60-18 (LHT) - Body ground LG - Body ground Headlight leveling motor LH operation signal input With low beam headlights on, vehicle height not changed Below 1 V
With low beam headlights on, vehicle height changed and maintained for more than 3 seconds 1.0 to 14.4 V
A60-19 (SHRL) - Body ground GR - Body ground Rear height control sensor sub-assembly signal input Ignition switch off Below 1 V
Ignition switch ON 0.5 to 4.5 V
A60-21 (SGR) - Body ground L - Body ground Rear height control sensor sub-assembly ground Always Below 1 Ω
A60-23 (RH-) - Body ground W-B - Body ground Headlight leveling motor RH ground Always Below 1 Ω
A60-24 (LH-) - Body ground W - Body ground Headlight leveling motor LH ground Always Below 1 Ω

i.
E149152N39
2.806,1.183 3.146,1.325 0.34,0.142 10 GND

Waveform 1

Item Content
Tester Connection A60-16 (SPDR) - Body ground
Tool setting 5 V/DIV., 20 ms./DIV.
Vehicle condition Ignition switch ON, wheel being rotated

HINT:

The communication waveform changes according to the surrounding brightness.