Meter / Gauge System -- Terminals Of Ecu |
CHECK COMBINATION METER ASSEMBLY |

Disconnect the C27 and C28 combination meter assembly connectors.
Measure the voltage and resistance according to the value(s) in the table below.
If the result is not as specified, there may be a malfunction on the wire harness side.Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition C27-1 (B) - Body ground R - Body ground Battery Always 11 to 14 V C27-9 (TR) - Body ground*1 W-B - Body ground Rheostat signal Rheostat knob fully turned to left 702 Ω C27-9 (TR) - Body ground*1 W-B - Body ground Rheostat signal Rheostat knob fully turned to right Below 1 Ω C27-9 (TR) - Body ground*2 W-G - Body ground Ground Always Below 1 Ω C27-21 (IG+) - Body ground B-O - Body ground IG2 signal Ignition switch ON 11 to 14 V C27-21 (IG+) - Body ground B-O - Body ground IG2 signal Ignition switch off Below 1 V C27-22 (EP) - Body ground Y - Body ground Ground Always Below 1 Ω C27-26 (PKBI) - Body ground*3 W-B - Body ground Ground Always Below 1 Ω - *1: w/ Light Control Rheostat
- *2: w/o Light Control Rheostat
- *3: w/o VSC
- *1: w/ Light Control Rheostat
Reconnect the C27 and C28 combination meter assembly connectors.
Measure the voltage according to the value(s) in the table below.
If the result is not as specified, the meter may have a malfunction.Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition C27-2 (ES) - C27-3 (L) BR - BR-Y Fuel level signal Ignition switch ON, fuel level F Below 1 V C27-2 (ES) - C27-3 (L) BR - BR-Y Fuel level signal Ignition switch ON, fuel level E 4 to 7 V C27-5 (SI) - Body ground P-L - Body ground Vehicle speed signal (input) Driving at approx. 20 km/h (12 mph) Pulse generation (See waveform 1) C27-6 (+S) - Body ground V-R - Body ground Vehicle speed signal (output) Driving at approx. 20 km/h (12 mph) Pulse generation (See waveform 1) C27-7 (S) - Body ground B-W - Body ground Tachometer signal Engine idling Pulse generation (See waveform 2) C27-8 (ILL+) - Body ground G - Body ground Light control switch signal Light control switch off Below 1 V C27-8 (ILL+) - Body ground G - Body ground Light control switch signal Light control switch TAIL or HEAD 11 to 14 V C27-10 (KSW) - Body ground G-Y - Body ground Unlock warning switch signal No key in ignition key cylinder Below 1 V C27-10 (KSW) - Body ground G-Y - Body ground Unlock warning switch signal Ignition switch off, key in ignition key cylinder 11 to 14 V C27-11 (BKL) - Body ground R-Y - Body ground Driver side seat belt warning signal Ignition switch ON, driver side seat belt unfastened Below 1 V C27-11 (BKL) - Body ground R-Y - Body ground Driver side seat belt warning signal Ignition switch ON, driver side seat belt fastened 11 to 14 V C27-12 (P) - Body ground*1 G-B - Body ground Automatic transmission shift position signal (P) Ignition switch ON, automatic transmission P indicator light off Below 1 V C27-12 (P) - Body ground*1 G-B - Body ground Automatic transmission shift position signal (P) Ignition switch ON, automatic transmission P indicator light on 11 to 14 V C27-13 (L) - Body ground*1, *2 W-G - Body ground A/T P warning light signal Ignition switch ON, shift lever on P, A/T P warning light on Below 1 V C27-13 (L) - Body ground*1, *2 W-G - Body ground A/T P warning light signal Ignition switch ON, shift lever on P, A/T P warning light off 11 to 14 V C27-14 (FFTR) - Body ground*3 W-G - Body ground FUEL FILTER warning light signal Ignition switch ON, FUEL FILTER warning light on Below 1 V C27-14 (FFTR) - Body ground*3 W-G - Body ground FUEL FILTER warning light signal Ignition switch ON, FUEL FILTER warning light off 11 to 14 V C27-15 (CTYD) - Body ground R-B - Body ground Driver side door signal (output) Driver side door closed 11 to 14 V C27-15 (CTYD) - Body ground R-B - Body ground Driver side door signal (output) Driver side door open Below 1 V C27-16 (DCTY) - Body ground R-B - Body ground Driver side door signal (input) Driver side door closed 11 to 14 V C27-16 (DCTY) - Body ground R-B - Body ground Driver side door signal (input) Driver side door open Below 1 V C27-17 (DOOR) - Body ground R-L - Body ground Door signal Doors closed (Disregarding driver side door) 11 to 14 V C27-17 (DOOR) - Body ground R-L - Body ground Door signal Doors open (Disregarding driver side door) Below 1 V C27-18 (OILW) - Body ground*1, *2 P - Body ground A/T OIL TEMP warning light signal Ignition switch ON, A/T OIL TEMP warning light on Below 1 V C27-18 (OILW) - Body ground*1, *2 P - Body ground A/T OIL TEMP warning light signal Ignition switch ON, A/T OIL TEMP warning light off 11 to 14 V C27-20 (SW) - Body ground B-Y - Body ground SRS warning light signal Ignition switch ON, SRS warning light off Pulse generation (See waveform 3) C27-20 (SW) - Body ground B-Y - Body ground SRS warning light signal Ignition switch ON, SRS warning light on Pulse generation (See waveform 4) C27-23 (S) - Body ground*3 L-R - Body ground FUEL FILTER warning light signal
(Level warning switch)Ignition switch ON, FUEL FILTER warning light on Below 1 V C27-23 (S) - Body ground*3 L-R - Body ground FUEL FILTER warning light signal
(Level warning switch)Ignition switch ON, FUEL FILTER warning light off 11 to 14 V C27-24 (B) - Body ground G-B - Body ground Turn signal indicator LH signal Ignition switch ON, turn signal indicator LH light off Below 1 V C27-24 (B) - Body ground G-B - Body ground Turn signal indicator LH signal Ignition switch ON, turn signal indicator LH light on 11 to 14 V C27-25 (B) - Body ground G-Y - Body ground Turn signal indicator RH signal Ignition switch ON, turn signal indicator RH light off Below 1 V C27-25 (B) - Body ground G-Y - Body ground Turn signal indicator RH signal Ignition switch ON, turn signal indicator RH light on 11 to 14 V C27-26 (PKBI) - Body ground*10 LG - Body ground BRAKE indicator light signal Ignition switch ON, BRAKE indicator light off 11 to 14 V C27-26 (PKBI) - Body ground*10 LG - Body ground BRAKE indicator light signal Ignition switch ON, BRAKE indicator light on Below 1 V C27-31 (MS5) - Body ground R-B - Body ground IG signal (for Speedometer sensor) Ignition switch ON 11 to 14 V C27-35 (S) - Body ground LG-B - Body ground OIL PRESSURE warning light signal Ignition switch ON, OIL PRESSURE warning light off 11 to 14 V C27-35 (S) - Body ground LG-B - Body ground OIL PRESSURE warning light signal Ignition switch ON, OIL PRESSURE warning light on Below 1 V C27-36 (SW) - Body ground LG - Body ground BRAKE warning light signal Ignition switch ON, BRAKE warning light off 11 to 14 V C27-36 (SW) - Body ground LG - Body ground BRAKE warning light signal Ignition switch ON, BRAKE warning light on Below 1 V C27-37 (CHG-) - Body ground GR - Body ground CHARGE warning light signal Ignition switch ON, CHARGE warning light off 11 to 14 V C27-37 (CHG-) - Body ground GR - Body ground CHARGE warning light signal Ignition switch ON, CHARGE warning light on Below 1 V C27-38 (LP) - Body ground R-G - Body ground ABS warning light signal Ignition switch ON, ABS warning light off 11 to 14 V C27-38 (LP) - Body ground R-G - Body ground ABS warning light signal Ignition switch ON, ABS warning light on Below 1 V C27-39 (CHK) - Body ground R-B - Body ground MIL signal Ignition switch ON, MIL off 11 to 14 V C27-39 (CHK) - Body ground R-B - Body ground MIL signal Ignition switch ON,
MIL onBelow 1 V C27-40 (GLW-) - Body ground*3 Y-R - Body ground GLOW indicator light signal Ignition switch ON, GLOW indicator light off 11 to 14 V C27-40 (GLW-) - Body ground*3 Y-R - Body ground GLOW indicator light signal Ignition switch ON, GLOW indicator light on Below 1 V C28-1 (L) - Body ground*11 GR-L - Body ground Automatic transmission shift position signal (L) Ignition switch ON, automatic transmission L indicator light on 11 to 14 V C28-1 (L) - Body ground*11 GR-L - Body ground Automatic transmission shift position signal (L) Ignition switch ON, automatic transmission L indicator light off Below 1 V C28-2 (2) - Body ground*11 P-L - Body ground Automatic transmission shift position signal (2) Ignition switch ON, automatic transmission L indicator light on 11 to 14 V C28-2 (2) - Body ground*11 P-L - Body ground Automatic transmission shift position signal (2) Ignition switch ON, automatic transmission L indicator light off Below 1 V C28-2 (2) - Body ground*1, *12 G-R - Body ground Automatic transmission shift position signal (L) Ignition switch ON, automatic transmission L indicator light on 11 to 14 V C28-2 (2) - Body ground*1, *12 G-R - Body ground Automatic transmission shift position signal (L) Ignition switch ON, automatic transmission L indicator light off Below 1 V C28-3 (3) - Body ground*1 L - Body ground Automatic transmission shift position signal (2) Ignition switch ON, automatic transmission 2 indicator light on 11 to 14 V C28-3 (3) - Body ground*1 L - Body ground Automatic transmission shift position signal (2) Ignition switch ON, automatic transmission 2 indicator light off Below 1 V C28-4 (4) - Body ground*1 G-O - Body ground Automatic transmission shift position signal (3) Ignition switch ON, automatic transmission 3 indicator light on 11 to 14 V C28-4 (4) - Body ground*1 G-O - Body ground Automatic transmission shift position signal (3) Ignition switch ON, automatic transmission 3 indicator light off Below 1 V C28-5 (D) - Body ground*1 B-R - Body ground Automatic transmission shift position signal (D) Ignition switch ON, automatic transmission D indicator light on 11 to 14 V C28-5 (D) - Body ground*1 B-R - Body ground Automatic transmission shift position signal (D) Ignition switch ON, automatic transmission D indicator light off Below 1 V C28-6 (N) - Body ground*1 R-W - Body ground Automatic transmission shift position signal (N) Ignition switch ON, automatic transmission N indicator light on 11 to 14 V C28-6 (N) - Body ground*1 R-W - Body ground Automatic transmission shift position signal (N) Ignition switch ON,
automatic transmission N indicator light offBelow 1 V C28-7 (R) - Body ground*1 R-Y - Body ground Automatic transmission shift position signal (R) Ignition switch ON, automatic transmission R indicator light on 11 to 14 V C28-7 (R) - Body ground*1 R-Y - Body ground Automatic transmission shift position signal (R) Ignition switch ON,
automatic transmission R indicator light offBelow 1 V C28-9 (L) - Body ground*13 B - Body ground REAR DIFFERENTIAL LOCK indicator signal Ignition switch ON, rear differential lock indicator light off 11 to 14 V C28-9 (L) - Body ground*13 B - Body ground REAR DIFFERENTIAL LOCK indicator signal Ignition switch ON, rear differential lock indicator light off Below 1 V C28-11 (-) - Body ground*7 R-Y - Body ground*9 High beam indicator light signal Ignition switch ON, HI BEAM indicator light off 11 to 14 V B-O - Body ground*5 C28-11 (-) - Body ground*7 R-Y - Body ground*9 High beam indicator light signal Ignition switch ON, HI BEAM indicator light on Below 1 V B-O - Body ground*5 C28-11 (-) - Body ground*8 R-Y - Body ground High beam indicator light signal Ignition switch ON, HI BEAM indicator light off Below 1 V C28-11 (-) - Body ground*8 R-Y - Body ground High beam indicator light signal Ignition switch ON, HI BEAM indicator light on 11 to 14 V C28-15 (FOG) - Body ground*14 G-B - Body ground Front fog indicator light signal Light control switch TAIL or HEAD, fog light switch off 11 to 14 V C28-15 (FOG) - Body ground*14 G-B - Body ground Front fog indicator light signal Light control switch TAIL or HEAD, fog light switch on Below 1 V C26-16 (TROF) - Body ground*10 BR - Body ground VSC OFF indicator light signal Ignition switch ON, VSC OFF indicator light on Below 1 V C26-16 (TROF) - Body ground*10 BR - Body ground VSC OFF indicator light signal Ignition switch ON, VSC OFF indicator light off 11 to 14 V C26-17 (SLIP) - Body ground*10 P - Body ground SLIP indicator light signal Ignition switch ON, SLIP indicator light on Below 1 V C26-17 (SLIP) - Body ground*10 P - Body ground SLIP indicator light signal Ignition switch ON, SLIP indicator light off 11 to 14 V C26-18 (DISL) - Body ground*15 G-B - Body ground Signal for amount of fuel consumption Engine idling Pulse generation C28-19 (TAUB) - Body ground*4 B-R - Body ground Signal for amount of fuel consumption Engine idling Pulse generation C28-20 (TAU) - Body ground*4 L - Body ground Signal for amount of fuel consumption Engine idling Pulse generation C28-22 (LVWG) - Body ground*5 B-L - Body ground Headlight leveling indicator light signal Ignition switch ON, headlight leveling indicator light off 11 to 14 V C28-22 (LVWG) - Body ground*5 B-L - Body ground Headlight leveling indicator light signal Ignition switch ON, headlight leveling indicator light off Below 1 V C28-25 (SW) - Body ground*6 R-B - Body ground Center differential lock indicator light signal Ignition switch ON, center differential lock indicator light off 11 to 14 V C28-25 (SW) - Body ground*6 R-B - Body ground Center differential lock indicator light signal Ignition switch ON, center differential lock indicator light on Below 1 V
*1: for Automatic Transmission
*2: for 4WD
*3: for 1KD-FTV, 2KD-FTV, 5L-E
*4: for 2TR-FE, 1GR-FE
*5: for HID Headlight
*6: w/ Center Differential Lock
*7: w/o Automatic Light Control System
*8: w/ Automatic Light Control System
*9: for Halogen Headlight
*10: w/ VSC
*11: for A750E, A750F
*12: except A750E, A750F
*13: w/ Rear Differential Lock
*14: w/ Front Fog Light
*15: for 1KD-FTV, 2KD-FTVUsing an oscilloscope, check waveform 1.
Waveform 1 (Reference) Item Condition Tester connection - C27-5 (SI) - Body ground
- C27-6 (+S) - Body ground
Tool setting 5 V/DIV., 20 msec./DIV. Vehicle Condition Driving at approx. 20 km/h (12 mph) - HINT:
- As the vehicle speed increases, the wavelength shortens.
- C27-5 (SI) - Body ground
Using an oscilloscope, check waveform 2.
Waveform 2 (Reference) Item Condition Tester connection C27-7 (S) - Body ground Tool setting 5 V/DIV., 10 msec./DIV. Vehicle Condition Engine idling - HINT:
- As the engine speed increases, the wavelength shortens.
Using an oscilloscope, check waveform 3.
Waveform 3 (Reference) Item Condition Tester connection C27-20 (SW) - Body ground Tool setting 5 V/DIV., 50 msec./DIV. Vehicle Condition Ignition switch ON, SRS warning light off Using an oscilloscope, check waveform 4.
Waveform 4 (Reference) Item Condition Tester connection C27-20 (SW) - Body ground Tool setting 5 V/DIV., 50 msec./DIV. Vehicle Condition Ignition switch ON, SRS warning light on
CHECK ACCESSORY METER ASSEMBLY |
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Disconnect the A43 accessory meter assembly connector.
Measure the voltage and resistance according to the value(s) in the table below.
If the result is not as specified, there may be a malfunction on the wire harness side.Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A43-1 (GND1) - Body ground LG - Body ground Ground Always Below 1 Ω A43-10 (SGND) - Body ground BR - Body ground Ground Always Below 1 Ω A43-12 (IG) - Body ground R-L - Body ground IG signal Ignition switch ON 11 to 14 V A43-12 (IG) - Body ground R-L - Body ground IG signal Ignition switch off Below 1 V A43-13 (ACC) - Body ground G-R - Body ground ACC signal Ignition switch ACC or ON 11 to 14 V A43-13 (ACC) - Body ground G-R - Body ground ACC signal Ignition switch off Below 1 V A43-14 (+B) - Body ground R - Body ground Battery Always 11 to 14 V Reconnect the A43 accessory meter assembly connector.
Measure the voltage according to the value(s) in the table below.
If the result is not as specified, the multi-display may be malfunctioning.Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A43-2 (SG) - A43-3 (TH+) BR-Y - W-G Air conditioning ambient temperature sensor signal Ignition switch ON, ambient temperature 25°C (77°F) 1.35 to 1.75 V A43-2 (SG) - A43-3 (TH+) BR-Y - W-G Air conditioning ambient temperature sensor signal Ignition switch ON, ambient temperature 40°C (104°F) 0.85 to 2.34 V A43-8 (PBEW) - Body ground G-W - Body ground Front passenger side seat belt warning light signal Ignition switch ON, front passenger side seat belt warning light on Below 1 V A43-8 (PBEW) - Body ground G-W - Body ground Front passenger side seat belt warning light signal Ignition switch ON, front passenger side seat belt warning light off 11 to 14 V A43-11 (SW+) - Body ground B - Body ground Steering pad switch signal Ignition switch ON, steering pad switch not pressed 4 V or more A43-11 (SW+) - Body ground B - Body ground Steering pad switch signal Ignition switch ON, INFO switch pressed Below 1 V A43-11 (SW+) - Body ground B - Body ground Steering pad switch signal Ignition switch ON, MODE RESET switch pressed 2 to 3 V
COMBINATION METER INNER CIRCUIT |






TABLE OF TERMINAL CONNECTION |
*2: for 4WD
*3: for 1KD-FTV, 2KD-FTV, 5L-E
*4: for 2TR-FE, 1GR-FE
*5: for HID Headlight
*6: w/ Center Differential Lock
*7: w/ Automatic Light Control System
*8: w/o Automatic Light Control System
*9: for Radio and Display Type
*10: w/ Light Control Rheostat
*11: w/o Light Control Rheostat
*12: for RHD
*13: for LHD
*14: w/o VSC
*15: w/ VSC
*16: for A750E, A750F
*17: w/ Front Fog Light
*18: for 1KD-FTV, 2KD-FTV
*19: w/ Accessory Meter Assembly
*20: w/ Rear Differential Lock
*21: for 1GR-FE
*22: for 1KD-FTV
Terminal No. | Wire Harness Side | |
C27 | 1 | DOME fuse |
2 | Fuel sender gauge assembly | |
3 | Fuel sender gauge assembly | |
4 | ECM | |
5 | Speedometer sensor | |
6 | 4-pulse output | |
7 | ECM | |
8 |
| |
9 |
| |
10 | Unlock warning switch assembly | |
11 |
| |
12 | Park/neutral position switch assembly*1 | |
13 | No. 2 transfer indicator switch (Neutral position switch)*1, *2 | |
14 | Clogging switch*3 | |
15 | Integration relay | |
16 | Front door courtesy light switch assembly RH | |
17 |
| |
18 |
| |
19 | - | |
20 | Center airbag sensor assembly | |
21 | MET fuse | |
22 | Body ground | |
23 | Level warning switch*3 | |
24 | Turn signal flasher assembly | |
25 | Turn signal flasher assembly | |
26 |
| |
27 | - | |
28 | - | |
29 | - | |
30 | - | |
31 | Speedometer sensor | |
32 | - | |
33 | - | |
34 | - | |
35 | Engine oil pressure switch assembly | |
C27 | 36 |
|
37 | Generator | |
38 | Brake actuator assembly | |
39 | ECM | |
40 | ECM*3 | |
C28 | 1 | Park/neutral position switch assembly*16 |
2 | Park/neutral position switch assembly*1 | |
3 | Park/neutral position switch assembly*1 | |
4 | Shift lock control ECU*1 | |
5 | Shift lock control ECU*1 | |
6 | Park/neutral position switch assembly*1 | |
7 | Park/neutral position switch assembly*1 | |
8 | - | |
9 | No. 1 transfer indicator switch (Rear differential lock position switch)*20 | |
10 | - | |
11 |
| |
12 | - | |
13 | - | |
14 | - | |
15 | Headlight dimmer switch assembly*17 | |
16 | - | |
17 | - | |
18 | ECM*22 | |
19 | INJ fuse*21 | |
20 | No. 1 fuel injector assembly*3 | |
21 | - | |
22 | Headlight leveling ECU assembly*5 | |
23 | Accessory meter assembly*19 | |
24 | Accessory meter assembly*19 | |
25 | No. 3 transfer indicator switch (Center differential lock position switch)*6 | |
26 | - | |
27 | - | |
28 | - |