GSIC - Global Service Information Center

# METER / GAUGE SYSTEM > TERMINALS OF ECU

## for Preparation Click here

CHECK COMBINATION METER ASSEMBLY

1. Disconnect the C8 and C19 meter connectors.

2. Measure the resistance of the wire harness side connectors.

   Terminal No. | Wiring Color | Terminal Description | Condition | Specified Condition
   C8-1 - Body ground | R - Body ground | Battery | Always | 10 to 14 V
   C8-21 - C8-22 | B-O - Y | IG2 signal | Ignition switch ON | 10 to 14 V
   C8-21 - C8-22 | B-O - Y | IG2 signal | Ignition switch OFF | Below 1 V
   C19-11 - Body ground*1 | B-R - Body ground | Power supply for fuel consumption calculation | Ignition switch ON | 10 to 14 V
   C19-11 - Body ground*1 | B-R - Body ground | Power supply for fuel consumption calculation | Ignition switch OFF | Below 1 V
   C8-22 - Body ground | Y - Body ground | Ground | Always | Below 1 Ω
   C8-19 - Body ground*2 | W-B - Body ground | Ground | Always | Below 1 Ω
   C8-38 - Body ground*3 | R-G - Body ground | Ground | Always | Below 1 Ω
   C8-9 - Body ground*4 | W-G - Body ground | Ground | Always | Below 1 Ω
   C8-9 - Body ground*5 | W-G - Body ground | Rheostat signal | Rheostat knob fully turned to left position | 702 Ω
   C8-9 - Body ground*5 | W-G - Body ground | Rheostat signal | Rheostat knob fully turned to right position | Below 1 Ω

   HINT:
     *1: 1TR-FE, 2TR-FE
     *2: w/o Airbag
     *3: w/o ABS
     *4: w/o Rheostat
     *5: w/ Rheostat
   If the result is not as specified, there may be a malfunction on the wire harness side.

3. Reconnect the C8 and C19 meter connectors.

4. Measure the voltage of the connectors.

   Terminal No. | Wiring Color | Terminal Description | Condition | Specified Condition
   C8-2 - C8-3 | BR - BR-Y | Fuel level signal | Ignition switch ON, fuel level F | Below 1 V
   C8-2 - C8-3 | BR - BR-Y | Fuel level signal | Ignition switch ON, fuel level F | 4 to 7 V
   C8-5 - Body ground | P-L - Body ground | Vehicle speed signal (input) | Ignition switch ON, slowly turn wheel | Pulse generation (see waveform 1)
   C8-6 - Body ground | V-R - Body ground | Vehicle speed signal (output) | Vehicle is driven | Pulse generation (see waveform 1)
   C8-7 - Body ground | B-W - Body ground | Tachometer signal | Engine running | Pulse generation (see waveform 2)
   C8-8 - C8-22 | G - Y | Light control switch signal | Light control switch is OFF | Below 1 V
   C8-8 - C8-22 | G - Y | Light control switch signal | Light control switch is ON | 10 to 14 V
   C8-10 - Body ground | G-Y - Body ground | Unlock warning switch signal | No key in ignition key cylinder | Below 1 V
   C8-10 - Body ground | G-Y - Body ground | Unlock warning switch signal | Ignition switch OFF, key is in ignition key cylinder | 10 to 14 V
   C8-11 - Body ground | R-Y - Body ground | Driver side seat belt warning signal | Ignition switch ON, driver side seat belt unfastened | Below 1 V
   C8-11 - Body ground | R-Y - Body ground | Driver side seat belt warning signal | Ignition switch ON, driver side seat belt fastened | 10 to 14 V
   C8-12 - C8-13*1 | G-B - W-G | Unengaged park warning signal | Ignition switch ON, A/T shift lever on P, transfer shift lever not on P | 10 to 14 V
   C8-12 - C8-13*1 | G-B - W-G | Unengaged park warning signal | Ignition switch ON, A/T shift lever on P, transfer shift lever on P | Below 1 V
   C8-14 - Body ground*3 | W-G - Body ground | Fuel filter warning signal | Ignition switch ON, fuel system warning light OFF | Below 1 V
   C8-14 - Body ground*3 | W-G - Body ground | Fuel filter warning signal | Ignition switch ON, fuel system warning light ON | 10 to 14 V
   C8-15 - Body ground | R-B - Body ground | Driver side door signal (output) | Driver side door is closed | Below 1 V
   C8-15 - Body ground | R-B - Body ground | Driver side door signal (output) | Driver side door is open | 10 to 14 V
   C8-16 - Body ground | R-B - Body ground | Driver side door signal (input) | Driver side door is closed | Below 1 V
   C8-16 - Body ground | R-B - Body ground | Driver side door signal (input) | Driver side door is open | Below 1 V
   C8-17 - Body ground | R-L - Body ground | Door signal | All doors are closed | 10 to 14 V
   C8-17 - Body ground | R-L - Body ground | Door signal | All doors are open | Below 1 V
   C8-18 - Body ground*1 | P - Body ground | ATF temperature warning signal | Ignition switch ON, ATF temperature warning light OFF | 10 to 14 V
   C8-18 - Body ground*1 | P - Body ground | ATF temperature warning signal | Ignition switch ON, ATF temperature warning light ON | Below 1 V
   C8-23 - Body ground*3 | L-R - Body ground | Sedimenter warning signal | Ignition switch ON, fuel system warning light OFF | 10 to 14 V
   C8-23 - Body ground*3 | L-R - Body ground | Sedimenter warning signal | Ignition switch ON, fuel system warning light ON | Below 1 V
   C8-24 - C8-22 | G-B - Y | Turn signal indicator LH signal | Ignition switch ON, turn signal indicator LH light OFF | Below 1 V
   C8-24 - C8-22 | G-B - Y | Turn signal indicator LH signal | Ignition switch ON, turn signal indicator LH light ON | 10 to 14 V
   C8-25 - C8-22 | G-Y - Y | Turn signal indicator RH signal | Ignition switch ON, turn signal indicator RH light OFF | Below 1 V
   C8-25 - C8-22 | G-Y - Y | Turn signal indicator RH signal | Ignition switch ON, turn signal indicator RH light ON | 10 to 14 V
   C8-27 - Body ground | R-Y - Body ground | HI BEAM indicator signal | HI BEAM indicator light OFF | 10 to 14 V
   C8-27 - Body ground | R-Y - Body ground | HI BEAM indicator signal | HI BEAM indicator light ON | Below 1 V
   C8-28 - Body ground*4 | L-B - Body ground | Cruise indicator signal | Ignition switch ON, cruise control main switch OFF | 10 to 14 V
   C8-28 - Body ground*4 | L-B - Body ground | Cruise indicator signal | Ignition switch ON, cruise control main switch ON | Below 1 V
   C8-31 - Body ground*4 | R-B - Body ground | 4WD indicator signal | Ignition switch ON, transfer shift lever in position other than H4 or L4 | 10 to 14 V
   C8-31 - Body ground*4 | R-B - Body ground | 4WD indicator signal | Ignition switch ON, transfer shift lever on H4 or L4 | Below 1 V
   C8-35 - Body ground | LG-B - Body ground | Oil pressure warning signal | Ignition switch ON, oil pressure warning light OFF | 10 to 14 V
   C8-35 - Body ground | LG-B - Body ground | Oil pressure warning signal | Ignition switch ON, oil pressure warning light ON | Below 1 V
   C8-36 - Body ground | LG - Body ground | Brake warning signal | Ignition switch ON, brake warning light OFF | 10 to 14 V
   C8-36 - Body ground | LG - Body ground | Brake warning signal | Ignition switch ON, brake warning light ON | Below 1 V
   C8-37 - Body ground | GR - Body ground | Charge warning signal | Ignition switch ON, charge warning light OFF | 10 to 14 V
   C8-37 - Body ground | GR - Body ground | Charge warning indicator | Ignition switch ON, charge warning light ON | Below 1 V
   C8-38 - Body ground*2 | R-G - Body ground | ABS warning indicator | Ignition switch ON, ABS warning light OFF | 10 to 14 V
   C8-38 - Body ground*2 | R-G - Body ground | ABS warning signal | Ignition switch ON, ABS warning light ON | Below 1 V
   C8-39 - Body ground | R-B - Body ground | MIL signal | Ignition switch ON, MIL warning light OFF | 10 to 14 V
   C8-39 - Body ground | R-B - Body ground | MIL signal | Ignition switch ON, MIL warning light ON | Below 1 V
   C8-40 - Body ground*3 | Y-R - Body ground | Glow indicator signal | Ignition switch ON, Glow indicator light OFF | 10 to 14 V
   C8-40 - Body ground*3 | Y-R - Body ground | Glow indicator signal | Ignition switch ON, Glow indicator light ON | Below 1 V
   C19-1 - Body ground*5 | GR-L - Body ground | A/T shift position signal (L) | Ignition switch ON, A/T L indicator light OFF | Below 1 V
   C19-1 - Body ground*5 | GR-L - Body ground | A/T shift position signal (L) | Ignition switch ON, A/T L indicator light ON | 10 to 14 V
   C19-2 - Body ground*5 | G-R - Body ground | A/T shift position signal (L) | Ignition switch ON, A/T L indicator light OFF | Below 1 V
   C19-2 - Body ground*5 | G-R - Body ground | A/T shift position signal (L) | Ignition switch ON, A/T L indicator light ON | 10 to 14 V
   C19-2 - Body ground*5 | P-L - Body ground | A/T shift position signal (2) | Ignition switch ON, A/T 2 indicator light OFF | Below 1 V
   C19-2 - Body ground*5 | P-L - Body ground | A/T shift position signal (2) | Ignition switch ON, A/T 2 indicator light ON | 10 to 14 V
   C19-3 - Body ground*5 | L - Body ground | A/T shift position signal (2) | Ignition switch ON, A/T 2 indicator light OFF | Below 1 V
   C19-3 - Body ground*5 | L - Body ground | A/T shift position signal (2) | Ignition switch ON, A/T 2 indicator light ON | 10 to 14 V
   C19-3 - Body ground*5 | L - Body ground | A/T shift position signal (3) | Ignition switch ON, A/T 3 indicator light OFF | Below 1 V
   C19-3 - Body ground*5 | L - Body ground | A/T shift position signal (3) | Ignition switch ON, A/T 3 indicator light ON | 10 to 14 V
   C19-4 - Body ground*5 | G-O - Body ground | A/T shift position signal (3) | Ignition switch ON, A/T 3 indicator light OFF | Below 1 V
   C19-4 - Body ground*5 | G-O - Body ground | A/T shift position signal (3) | Ignition switch ON, A/T 3 indicator light ON | 10 to 14 V
   C19-4 - Body ground*5 | G-O - Body ground | A/T shift position signal (4) | Ignition switch ON, A/T 4 indicator light OFF | Below 1 V
   C19-4 - Body ground*5 | G-O - Body ground | A/T shift position signal (4) | Ignition switch ON, A/T 4 indicator light ON | 10 to 14 V
   C19-5 - Body ground*6 | B-R - Body ground | A/T shift position signal (D) | Ignition switch ON, A/T D indicator light OFF | Below 1 V
   C19-5 - Body ground*6 | B-R - Body ground | A/T shift position signal (D) | Ignition switch ON, A/T D indicator light ON | 10 to 14 V
   C19-6 - Body ground*6 | R-W - Body ground | A/T shift position signal (N) | Ignition switch ON, A/T N indicator light OFF | Below 1 V
   C19-6 - Body ground*6 | R-W - Body ground | A/T shift position signal (N) | Ignition switch ON, A/T N indicator light ON | 10 to 14 V
   C19-9 - Body ground*3 | G-B - Body ground | Signal for amount of fuel consumption | Engine running | Pulse generation
   C19-10 - Body ground*7 | L - Body ground | Injector signal | Engine running | Pulse generation
   C19-14 - Body ground*6 | R-Y - Body ground | A/T shift position signal (R) | Ignition switch ON, A/T L indicator light OFF | Below 1 V
   C19-14 - Body ground*6 | R-Y - Body ground | A/T shift position signal (R) | Ignition switch ON, A/T R indicator light ON | 10 to 14 V

   HINT:
     *1: 4WD (A/T)
     *2: w/ ABS
     *3: 1KD-FTV, 2KD-FTV
     *4: w/ Cruise control system
     *5: 1GR-FE (A/T), 1KD-FTV (A/T)
     *6: A/T
     *7: 1TR-FE, 2TR-FE, 1GR-FE
     If the result is not as specified, the combination meter may be malfunctioning.

5. Using an oscilloscope, check the signal waveform of the meter.

   Waveform 1 (Reference)
   Item | Content
   Terminal No. | C8-5 - Body ground
   Tool Setting | 5 V/DIV., 10 msec./DIV.
   Vehicle Condition | Driving at approx. 20 km/h (12 mph)

   HINT:
     As vehicle speed increases, the wavelength shortens.

   Waveform 2 (Reference)
   Item | Content
   Terminal No. | C8-7 - Body ground
   Tool Setting | 5 V/DIV., 10 msec./DIV.
   Vehicle Condition | Engine idling

   HINT:
     As vehicle speed increases, the wavelength shortens.

CHECK ACCESSORY METER (MULTI-DISPLAY)

1. Disconnect the A27 meter connector.

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

   Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specified Condition
   +B (A27-14) - Body ground | R - Body ground | +B power supply | Always | 10 to 14 V
   IG (A27-12) - Body ground | R-B - Body ground | IG power supply | Ignition switch ON | 10 to 14 V
   IG (A27-12) - Body ground | R-B - Body ground | IG power supply | Ignition switch OFF | Below 1 V
   ACC (A27-13) - Body ground | G-R - Body ground | ACC power supply | Ignition switch ACC | 10 to 14 V
   ACC (A27-13) - Body ground | G-R - Body ground | ACC power supply | Ignition switch OFF | Below 1 V
   GND1 (A27-1) - Body ground | LG - Body ground | Ground | Always | Below 1 Ω
   SGND (A27-10) - Body ground | BR - Body ground | Ground | Always | Below 1 Ω

   If the result is not as specified, there may be a malfunction on the wire harness side.

3. Reconnect the A27 meter connector.

4. Measure the voltage of the connector.

   Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specified Condition
   SG (A27-2) - TH+ (A27-3) | BR-Y - W-G | A/C ambient temperature sensor signal | Ignition switch ON, ambient temperature 25 °C (77 °F) | 1.35 to 1.75 V
   SG (A27-2) - TH+ (A27-3) | BR-Y - W-G | A/C ambient temperature sensor signal | Ignition switch ON, ambient temperature 40°C (104 °F) | 0.85 to 2.34 V

   If the result is not as specified, the accessory meter may be malfunctioning.

Table of Terminal Connection
Terminal No. | Wire Harness Side
C8 | 1 | DOME Fuse
2 | Fuel Suction w/ Pump and Gauge Tube Assembly
3 | Fuel Suction w/ Pump and Gauge Tube Assembly
4 | ECM
5 | Vehicle Speed Sensor
6 | 4 Pulse Output
7 | ECM
8 | Headlight Dimmer Switch Assembly
9 | Light Control Rheostat
10 | Unlock Warning Switch Assembly
11 | Front Seat Inner Belt Assembly (Driver Side)
12 | PNP Switch Assembly*1
13 | Transfer Neutral Detection Switch*1
14 | Fuel Filter Assembly (Fuel Filter Switch)*2
15 | Integration Relay
16 | Front Door Courtesy Light Switch Assembly (Driver Side)
17 | Door Courtesy Light Switch Assembly
18 | TCM*3
19 | Body ground*4
20 | Center Airbag Sensor Assembly*5
21 | MET Fuse
22 | Body ground
23 | Fuel Filter (Fuel Sedimenter Switch)*2
24 | Turn Signal Flasher Relay
25 | Turn Signal Flasher Relay
26 | -
27 | Headlight Dimmer Switch Assembly
28 | ECM (CRUISE)*6
29 | -
30 | -
31 | 4WD Control ECU*7
32 | -
33 | -
34 | -
35 | Oil Pressure Switch Assembly
36 | Parking Brake Switch Assembly Brake Fluid Level Warning Switch Vacuum Warning Switch
37 | Generator Assembly
38 | Skid Control ECU with Actuator*5, Body Ground*5
39 | ECM (MIL)
40 | ECM (GLOW)*2

HINT:

  *1: A/T

  *2: 1KD-FTV, 2KD-FTV

  *3: 1KD-FTV (A/T)

  *4: w/o Airbag

  *5: w/ Airbag

  *6: w/ Cruise Control System

  *7: 4WD

Table of Terminal Connection
Terminal No. | Wire Harness Side
C19 | 1 | PNP Switch*1
2 | PNP Switch*2 Shift Lock Control ECU*3
3 | PNP Switch*1
4 | Shift Lock Control ECU*1
5 | Shift Lock Control ECU*1
6 | PNP Switch*1
7 | -
8 | -
9 | ECM*4
10 | Fuel Injector Assembly*5
11 | INJ Fuse*6
12 | Accessory Meter Assembly (Multi-display)*7
13 | Accessory Meter Assembly (Multi-display)*7
14 | PNP Switch*1
15 | -
16 | -

HINT:

  *1: A/T

  *2: 1KD-FTV (A/T)

  *3: 1GR-FE (A/T)

  *4: 1GR-FE, 1KD-FTV

  *5: 1TR-FE, 2TR-FE, 1GR-FE

  *6: 1TR-FE, 2TR-FE

  *7: w/ Accessory meter assembly (Multi-display)