METER / GAUGE SYSTEM > TERMINALS OF ECU

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CHECK COMBINATION METER

B210249E03

  1. Disconnect the D1 combination meter assembly connector.

  2. Measure the voltage and resistance of the wire harness side connector.

    Terminals No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    D1-1 (IG+) - Body ground
    		SB - Body ground
    		Ignition switch signal
    		Ignition switch off → ON
    		Below 1 V → 11 to 14 V
    D1-2 (B) - Body ground
    		P - Body ground
    		Battery
    		Always
    		11 to 14 V
    D1-24 (ET) - Body ground
    		BR - Body ground
    		Ground
    		Always
    		Below 1 Ω
    If the result is not as specified, there may be a malfunction in the wire harness.

  3. Reconnect the D1 combination meter assembly connector.



  4. Measure the voltage of the wire harness side connector.

    Terminals No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    D1-3 (L) - Body ground
    		GR - Body ground
    		Fuel level signal
    		Ignition switch ON
    Fuel level is FULL → EMPTY
    		Below 1 V → 4.5 to 9.0 V
    D1-4 (TX1-) - Body ground
    		V- Body ground
    		Ambient temperature sensor signal
    		Ignition switch ON
    		4.5 to 5.5 V
    D1-5 (RRSB)*1 - Body ground
    		LG - Body ground
    		Rear seat inner belt assembly signal (RH side)
    		Rear RH seat belt is unfastened → fastened
    		Below 1 V → 11 to 14 V
    D1-6 (RLSB)*1 - Body ground
    		R - Body ground
    		Rear seat inner belt assembly signal (LH side)
    		Rear LH seat belt is unfastened → fastened
    		Below 1 V → 11 to 14 V
    D1-7 (RRBT)*1 - Body ground
    		B - Body ground
    		Rear RH seat belt warning light signal
    		Rear RH seat belt warning light ON → OFF
    		Below 1 V → 11 to 14 V
    D1-8 (FUS-) - Body ground
    		BR - Body ground
    		Fuel sender gauge ground
    		Always
    		Below 1 Ω
    D1-9 (RLBT)*1 - Body ground
    		SB - Body ground
    		Rear LH seat belt warning light signal
    		Rear LH seat belt warning light ON → OFF
    		Below 1 V → 11 to 14 V
    D1-10 (P/SB) - Body ground
    		V - Body ground
    		Front seat inner belt assembly signal (passenger side)
    		Front passenger seat is occupied and its seat belt is unfastened → fastened
    		Below 1 V → 11 to 14 V
    D1-11 (OILW)*2 - Body ground
    		P - Body ground
    		Oil level sensor signal
    		Ignition switch ON
    		11 to 14V
    D1-12 (R)*3 - Body ground
    		GR - Body ground
    		M/T shift position signal (R)
    		M/T shift warning buzzer OFF → ON
    		Below 1 V → 11 to 14 V
    D1-14 (ILL+) - Body ground
    		G - Body ground
    		Taillight signal
    		Light control switch OFF → ON
    		Below 1 V → 11 to 14 V
    D1-15 (LP)*4 - Body ground
    		SB - Body ground
    		Security indicator light signal
    		Security indicator light OFF → ON
    		Below 1 V → 11 to 14 V
    D1-16 (+S) - Body ground
    		BR - Body ground
    		Speed signal (Output)
    		Driving at approximately
    20 km/h (12 mph)
    		Pulse generation
    (See waveform 1)
    D1-17 (SI) - Body ground
    		G - Body ground
    		Speed signal (Input)
    		Driving at approximately
    20 km/h (12 mph)
    		Pulse generation
    (See waveform 1)
    D1-20 (CANL) - Body ground
    		W - Body ground
    		CAN communication line
    		Ignition switch ON
    		Pulse generation
    D1-21 (CANH) - Body ground
    		G - Body ground
    		CAN communication line
    		Ignition switch ON
    		Pulse generation
    D1-23 (TX1+) - Body ground
    		L - Body ground
    		Ambient temperature sensor ground
    		Always
    		Below 1 Ω
    D2-1 (B) - Body ground
    		P - Body ground
    		Left turn signal
    		Ignition switch ON
    Left turn indicator light OFF → ON
    		Below 1 V → 11 to 14 V
    D2-2 (FOG)*5 - Body ground
    		GR - Body ground
    		Front fog signal
    		Ignition switch ON
    Front fog switch OFF → ON
    		Below 1 V → 11 to 14 V
    D2-3 (S) - Body ground
    		W - Body ground
    		Rear fog signal
    		Ignition switch ON
    Rear fog switch OFF → ON
    		Below 1 V → 11 to 14 V
    D2-5 (EFI) - Body ground
    		BR - Body ground
    		Check engine warning light signal
    		Check engine warning light ON → OFF
    		Below 1 V → 11 to 14 V
    D2-6 (S)*2 - Body ground
    		SB - Body ground
    		Fuel filter warning switch signal
    		Fuel filter warning light ON → OFF
    		Below 1 V → 11 to 14 V
    D2-7 (SW) - Body ground
    		W - Body ground
    		Brake fluid level warning light signal
    		Ignition switch ON
    Brake fluid level warning light ON → OFF
    		Below 1 V → 11 to 14 V
    D2-8 (CHG-) - Body ground
    		R - Body ground
    		Charge warning light signal
    		Engine start
    Charge warning light ON → OFF
    		Below 1 V → 11 to 14 V
    D2-9 (IND) - Body ground
    		SB - Body ground
    		Tail light indicator signal
    		Light control switch ON → OFF
    		Below 1 V → 11 to 14 V
    D2-10 (B) - Body ground
    		L - Body ground
    		Right turn signal
    		Ignition switch ON
    Right turn indicator light OFF → ON
    		Below 1 V → 11 to 14 V
    D2-11 (+) - Body ground
    		B - Body ground
    		High beam indicator signal (+)
    		Always
    		11 to 14 V
    D2-13 (S) - Body ground
    		LG - Body ground
    		Engine oil pressure signal
    		Engine oil pressure warning light ON → OFF
    		Below 1 V → 11 to 14 V
    D2-14 (-) - Body ground
    		W-B - Body ground
    		High beam indicator signal (-)
    		High beam indicator light ON → OFF
    		Below 1 V → 11 to 14 V
    D2-16 (PBLT) - Body ground
    		Y - Body ground
    		Passenger seat belt warning light signal
    		Ignition switch ON
    Passenger seat belt warning light OFF → ON → OFF
    		Below 1 V → 11 to 14 V → Below 1 V

    1. *1: w/ Rear seat belt warning system
    2. *2: for 1ND-TV
    3. *3: for Manual Transaxle
    4. *4: w/ Theft Deterrent System
    5. *5: w/ Front Fog Lights
    If the result is not as specified, the combination meter assembly may have a malfunction.



      E115032E01

    1. Waveform 1: Using an oscilloscope
      Terminal Connections
      		D1-16 (+S) and Body ground
      D1-17 (SI) and Body ground
      Tool Setting
      		5 V/DIV, 20 ms/DIV
      Condition
      		Driving at approximately 20 km/h (12 mph)

      HINT:
      As the vehicle speed increases, the cycle of the signal waveform narrows.


CHECK MAIN BODY ECU AND INSTRUMENT PANEL JUNCTION BLOCK

B210280E01


Text in Illustration 
*1
Instrument Panel Junction Block
-
-

B210281E01


Text in Illustration 
*1
Main body ECU (w/ Theft Deterrent System)
-
-

B210282E02


Text in Illustration 
*1
Main body ECU (w/o Theft Deterrent System)
-
-

  1. Remove the main body ECU.

  2. Disconnect the D42 main body ECU connector.

  3. Measure the resistance and voltage between each terminal of the wire harness side connectors and body ground.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    3F-11 (GND1) - Body ground
    		-
    		Ground
    		Always
    		Below 1 Ω
    3F-29 (ACC)*1 - Body ground
    		-
    		Ignition power supply (ACC signal)
    		Ignition switch ACC → off
    		11 to 14 V → Below 1 V
    3F-30 (BECU) - Body ground
    		-
    		+B (power system signal system) power supply
    		Always
    		11 to 14 V
    3F-31 (ALTB) - Body ground
    		-
    		+B (power system alternator system) power supply
    		Always
    		11 to 14 V
    3F-32 (IG)*1 - Body ground
    		-
    		Ignition power supply (IG signal)
    		Ignition switch ON → off
    		11 to 14 V → Below 1 V
    D42-19 (BCTY) - Body ground
    		V - Body ground
    		Back door courtesy switch input
    		Back door CLOSED → OPEN
    		10 kΩ or higher → Below 1 Ω

    1. *1: w/o Entry and Start System
    If the result is not as specified, there may be a malfunction on the wire harness side.

  4. Reinstall the main body ECU.

  5. Reconnect the main body ECU connectors.

  6. Measure the voltage between each terminal of the wire harness side connectors and body ground.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    3C-33 (PKB) - Body ground
    		R - Body ground
    		Parking brake signal
    		Parking brake warning light ON → OFF
    		Below 1 V → 11 to 14 V
    3E-20 (DBKL) - Body ground
    		SB - Body ground
    		Front seat inner belt assembly signal (driver side)
    		Driver seat belt warning light OFF → ON
    		Below 1 V → 11 to 14 V
    D42-13 (CANL) - Body ground
    		W - Body ground
    		CAN communication line
    		Ignition switch ON
    		Pulse generation
    D42-14 (CANH) - Body ground
    		R - Body ground
    		CAN communication line
    		Ignition switch ON
    		Pulse generation
    If the result is not as specified, there may be a malfunction in the wire harness.


COMBINATION METER INTERNAL CIRCUIT

E177322E01


E177323E01


E177324E01


Connectors 
Terminal No.
Wire Harness Side
D1
1
IG2 relay*1
Backup boost converter*2
2
Battery
3
Fuel sender gauge assembly
4
Ambient temperature sensor
5
Rear seat inner belt assembly RH*3
6
Rear seat inner belt assembly RH*3
7
Telltale light assembly*3
8
Fuel sender gauge assembly
9
Telltale light assembly*3
10
Occupant detection sensor
11
Engine oil level sensor*4
12
Back-up light switch*5
14
Panel relay*6
Headlight dimmer switch*7
15
Main body ECU*8
16
Other ECU
17
Brake actuator assembly
20
CAN communication line
21
CAN communication line
23
Ambient temperature sensor
24
Body ground
D2
1
Turn signal flasher assembly
2
FR FOG relay*9
3
RR FOG relay
5
ECM
6
Level warning switch*4
7
Brake fluid level warning switch
8
Generator
9
TAIL relay*6
Headlight dimmer switch*7
10
Turn signal flasher assembly
11
DIMMER relay*6
Battery*7
13
Engine oil pressure switch*1
Engine stop and start ECU*2
14
Body ground*6
Headlight dimmer switch*7
16
Telltale light assembly
  1. *1: w/o Stop and Start System
  2. *2: w/ Stop and Start System
  3. *3: w/ Rear Seat Belt Warning System
  4. *4: for 1ND-TV
  5. *5: for Manual Transaxle
  6. *6: w/ Daytime Running Light System or w/ Automatic Light Control System
  7. *7: w/o Daytime Running Light System and w/o Automatic Light Control System
  8. *8: w/ Theft Deterrent System
  9. *9: w/ Front Fog Lights