2NZ-FE ENGINE CONTROL SFI SYSTEM TERMINALS OF ECM
2.813,0.24 3.208,0.479
0.396,0.24
5.469,0.25 5.865,0.49
0.396,0.24
2.885,0.292 3.583,0.542
0.698,0.25
10
false
B56
5.552,0.292 6.094,0.49
0.542,0.198
10
false
A56
- HINT:
-
The standard voltage, resistance and waveform between each pair of the ECM terminals is shown in the table below. The appropriate conditions for checking each pair of the terminals is also indicated. The result of checks should be compared with the standard voltage, resistance and waveform for each pair of the terminals as displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| A56-1 (+B2) - B56-104 (E1) | B - BR | Power source of ECM | Ignition switch ON | 11 to 14 V |
| A56-2 (+B) - B56-104 (E1) | B - BR | Power source of ECM | Ignition switch ON | 11 to 14 V |
| A56-3 (+BM) - B56-43 (ME01) | B - W-B | Power source of throttle actuator | Always | 11 to 14 V |
| A56-7 (FC) - B56-45 (E01) | R - W-B | Fuel pump control | Ignition switch ON | 11 to 14 V |
| Idling | Below 1.5 V | |||
| A56-8 (SPD) - B56-104 (E1) | V - BR | Vehicle speed signal from combination meter assembly signal | Driving at 20 km/h (12 mph) | Pulse generation
(See waveform 1) |
| A56-15 (TACH) - B56-104 (E1) | GR - BR | Engine speed signal | Idling with warm engine | Pulse generation
(See waveform 2) |
| A56-20 (BATT) - B56-104 (E1) | P - BR | Battery (for measuring battery voltage and for ECM memory) | Always | 11 to 14 V |
| A56-24 (W) - B56-104 (E1) | LG - BR | Malfunction Indicator Lamp (MIL) operation signal | Ignition switch ON (MIL goes on) | Below 1.5 V |
| Idling with warm engine | 11 to 14 V | |||
| A56-27 (TC) - B56-104 (E1) | P - BR | Terminal TC of DLC3 | Ignition switch ON | 11 to 14 V |
| A56-28 (IGSW) - B56-104 (E1) | B - BR | Ignition switch signal | Ignition switch ON | 11 to 14 V |
| A56-31 (ELS1) - B56-104 (E1) | G - BR | Electric load signal | Taillight switch on | 7.5 to 14 V |
| Taillight switch off | Below 1.0 V | |||
| A56-32 (EC) - Body ground | BR - - | Earth (ground) circuit of ECM | Always | Below 1 Ω |
| A56-33 (ELS2) - B56-104 (E1) | L - BR | Electric load signal | Rear window defogger switch on | 7.5 to 14 V |
| Rear window defogger switch off | Below 1.0 V | |||
| A56-35 (ST1-) - B56-104 (E1) | R - BR | Stop light switch assembly signal
(opposite of voltage at STP terminal) |
Ignition switch ON, brake pedal depressed | Below 1.0 V |
| Ignition switch ON, brake pedal released | 7.5 to 14 V | |||
| A56-36 (STP) - B56-104 (E1) | L - BR | Stop light switch assembly signal | Brake pedal depressed | 7.5 to 14 V |
| Brake pedal released | Below 1.0 V | |||
| A56-41 (CANH) - B56-104 (E1) | B - BR | CAN communication line | Ignition switch ON | Pulse generation
(See waveform 3) |
| A56-43 (RFC) - B56-104 (E1) | R - BR | Cooling fan control signal | Ignition switch ON, A/C switch on (max cool) | Pulse generation
(See waveform 4) |
| A56-44 (MREL) - B56-104 (E1) | L - BR | EFI-MAIN relay operation signal | Ignition switch ON | 11 to 14 V |
| Ignition switch off | Below 1.5 V | |||
| A56-48 (STA) - B56-104 (E1) | LG - BR | Starter signal | Cranking | 5.5 V or higher |
| A56-49 (CANL) - B56-104 (E1) | W - BR | CAN communication line | Ignition switch ON | Pulse generation
(See waveform 5) |
| A56-55 (VPA) - A56-59 (EPA) | W - Y | Accelerator pedal position sensor signal (for engine control) | Ignition switch ON, accelerator pedal fully released | 0.5 to 1.1 V |
| Ignition switch ON, accelerator pedal fully depressed | 2.6 to 4.5 V | |||
| A56-56 (VPA2) - A56-60 (EPA2) | R - G | Accelerator pedal position sensor signal | Ignition switch ON, accelerator pedal fully released | 1.2 to 2.0 V |
| Ignition switch ON, accelerator pedal fully depressed | 3.4 to 4.75 V | |||
| A56-57 (VCPA) - A56-59 (EPA) | B - Y | Power source of accelerator pedal position sensor (for VPA) | Ignition switch ON | 4.5 to 5.5 V |
| A56-58 (VCP2) - A56-60 (EPA2) | L - G | Power source of accelerator pedal position sensor (for VPA2) | Ignition switch ON | 4.5 to 5.5 V |
| B56-41 (M-) - B56-43 (ME01) | V - W-B | Throttle actuator operation signal (negative signal) | Idling with warm engine | Pulse generation
(See waveform 6) |
| B56-42 (M+) - B56-43 (ME01) | P - W-B | Throttle actuator operation signal (positive terminal) | Idling with warm engine | Pulse generation
(See waveform 7) |
| B56-43 (ME01) - Body ground | W-B - - | Earth (ground) circuit of ECM | Always | Below 1 Ω |
| B56-44 (E02) - Body ground | W-B - - | Earth (ground) circuit of ECM | Always | Below 1 Ω |
| B56-45 (E01) - Body ground | W-B - - | Earth (ground) circuit of ECM | Always | Below 1 Ω |
| B56-49 (PRG) - B56-45 (E01) | L - W-B | Purge VSV operation signal | Ignition switch ON | 11 to 14 V |
| Idling with warm engine, under purge control | Pulse generation
(See waveform 8) |
|||
| B56-50 (ALT) - B56-104 (E1) | L - BR | Generator assembly signal | Ignition switch ON | 11 to 14 V |
| B56-52 (NSW)* - B56-104 (E1) | W - BR | Park/Neutral position switch assembly signal | Ignition switch ON, shift lever not in P or N | 11 to 14 V |
| Ignition switch ON, shift lever in P or N | Below 1.0 V | |||
| B56-63 (GE01) - B56-104 (E1) | BR - BR | Shielded earth (ground) circuit of throttle actuator | Always | Below 1 V |
| B56-65 (THA) - B56-88 (ETHA) | L - W | Intake air temperature sensor signal | Idling with warm engine, intake air temperature 0 to 80°C (32 to 176°F) | 0.5 to 3.4 V |
| B56-67 (VCTA) - B56-91 (ETA) | G - L | Power source of throttle position sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| B56-81 (IGF1) - B56-104 (E1) | Y - BR | Ignition coil assembly (ignition confirmation signal) | Ignition switch ON | 4.5 to 5.5 V |
| Idling with warm engine | Pulse generation
(See waveform 9) |
|||
| B56-82 (IGT4) - B56-104 (E1) | W - BR | No. 4 ignition coil assembly signal
(ignition signal) |
Idling with warm engine | Pulse generation
(See waveform 9) |
| B56-83 (IGT3) - B56-104 (E1) | G - BR | No. 3 ignition coil assembly signal
(ignition signal) |
Idling with warm engine | Pulse generation
(See waveform 9) |
| B56-84 (IGT2) - B56-104 (E1) | B - BR | No. 2 ignition coil assembly signal
(ignition signal) |
Idling with warm engine | Pulse generation
(See waveform 9) |
| B56-85 (IGT1) - B56-104 (E1) | R - BR | No. 1 ignition coil assembly signal
(ignition signal) |
Idling with warm engine | Pulse generation
(See waveform 9) |
| B56-86 (E03) - Body ground | W-B - - | Earth (ground) circuit of ECM | Always | Below 1 Ω |
| B56-97 (THW) - B56-96 (ETHW) | B - BR | Engine coolant temperature sensor signal | Idling with warm engine, engine coolant temperature 75 to 100°C (167 to 212°F) | 0.2 to 1.0 V |
| B56-99 (G2+) - B56-121 (NE-) | B - W | Camshaft position sensor signal | Idling with warm engine | Pulse generation
(See waveform 10) |
| B56-100 (OC1+) - B56-123 (OC1-) | B - Y | Camshaft timing oil control valve assembly operation signal | Idling | Pulse generation
(See waveform 11) |
| B56-104 (E1) - Body ground | BR - - | Earth (ground) circuit of ECM | Always | Below 1 Ω |
| B56-105 (#40) - B56-45 (E01) | W - W-B | No. 4 fuel injector assembly signal | Ignition switch ON | 11 to 14 V |
| Idling with warm engine | Pulse generation
(See waveform 12) |
|||
| B56-106 (#30) - B56-45 (E01) | G - W-B | No. 3 fuel injector assembly signal | Ignition switch ON | 11 to 14 V |
| Idling with warm engine | Pulse generation
(See waveform 12) |
|||
| B56-107 (#20) - B56-45 (E01) | Y - W-B | No. 2 fuel injector assembly signal | Ignition switch ON | 11 to 14 V |
| Idling with warm engine | Pulse generation
(See waveform 12) |
|||
| B56-108 (#10) - B56-45 (E01) | B - W-B | No. 1 fuel injector assembly signal | Ignition switch ON | 11 to 14 V |
| Idling with warm engine | Pulse generation
(See waveform 12) |
|||
| B56-109 (HT1A) - B56-86 (E03) | L - W-B | Heated oxygen sensor heater operation signal | Ignition switch ON | 11 to 14 V |
| B56-110 (KNK1) - B56-111 (EKNK) | W - B | Knock control sensor signal | Engine speed maintained at 4000 rpm after warming up engine | Pulse generation
(See waveform 13) |
| B56-112 (OX1A) - B56-90 (EX1A) | B - W | Heated oxygen sensor signal | Engine speed maintained at 2500 rpm for 2 minutes after warming up engine | Pulse generation
(See waveform 14) |
| B56-114 (VTA2) - B56-91 (ETA) | R - L | Throttle position sensor signal (for sensor malfunction detection) | Ignition switch ON, accelerator pedal fully released | 2.1 to 3.1 V |
| Ignition switch ON, accelerator pedal fully depressed | 4.6 to 5.0 V | |||
| B56-115 (VTA1) - B56-91 (ETA) | LG - L | Throttle position sensor signal (for engine control) | Ignition switch ON, accelerator pedal fully released | 0.5 to 1.1 V |
| Ignition switch ON, accelerator pedal fully depressed | 3.2 to 4.8 V | |||
| B56-118 (VG) - B56-116 (E2G) | V - B | Mass air flow meter sub-assembly signal | Idling with warm engine, shift lever in P or neutral, A/C switch off | 0.5 to 3.0 V |
| B56-122 (NE+) - B56-121 (NE-) | B - W | Crankshaft position sensor signal | Idling with warm engine | Pulse generation
(See waveform 10) |
*: for A/T models.
WAVEFORM 1
2.677,0.125 3.354,0.385
0.677,0.26
10
false
2 V/DIV.
2.833,1.229 3.25,1.531
0.417,0.302
10
false
GND
1.156,1.99 2.219,2.167
1.063,0.177
10
false
20 ms./DIV.
| ECM Terminal Name | Between SPD and E1 |
| Tester Range | 2 V/DIV., 20 ms./DIV. |
| Condition | Driving at 20 km/h (12 mph) |
- HINT:
-
The wavelength becomes shorter as the vehicle speed increases.
WAVEFORM 2
0.438,0.313 1.167,0.625
0.729,0.313
10
5 V/DIV.
0.448,1.177 0.896,1.458
0.448,0.281
10
GND
1.688,1.885 2.708,2.104
1.021,0.219
10
10 ms./DIV.
| ECM Terminal Name | Between TACH and E1 |
| Tester Range | 5 V/DIV., 10 ms./DIV. |
| Condition | Idling with warm engine |
- HINT:
-
The wavelength becomes shorter as the engine speed increases.
WAVEFORM 3
2.75,0.292 3.354,0.583
0.604,0.292
10
1 V/DIV.
3.01,1.396 3.344,1.708
0.333,0.313
10
GND
1.604,1.896 2.479,2.125
0.875,0.229
10
10 μs./DIV.
| ECM Terminal Name | Between CANH and E1 |
| Tester Range | 1 V/DIV., 10 μs./DIV. |
| Condition | Ignition switch ON |
- HINT:
-
The waveform varies depending on the CAN communication signal.
WAVEFORM 4
2.76,1.563 3.115,1.792
0.354,0.229
10
GND
0.063,0.063 0.708,0.344
0.646,0.281
10
1 V/DIV.
1.344,1.854 2.208,2.083
0.865,0.229
10
2 ms./DIV.
| ECM Terminal Name | Between RFC and E1 |
| Tester Range | 1 V/DIV., 2 ms./DIV. |
| Condition | Ignition switch ON, A/C switch on (max cool) |
- HINT:
-
The duty ratio varies depending on the engine coolant temperature.
WAVEFORM 5
2.76,0.271 3.375,0.531
0.615,0.26
10
1 V/DIV.
3.01,1.365 3.375,1.604
0.365,0.24
10
GND
1.625,1.865 2.583,2.052
0.958,0.188
10
10 μs./DIV.
| ECM Terminal Name | Between CANL and E1 |
| Tester Range | 1 V/DIV., 10 μs./DIV. |
| Condition | Ignition switch ON |
- HINT:
-
The waveform varies depending on the CAN communication signal.
WAVEFORM 6
2.849,0.99 3.182,1.142
0.333,0.151
10
GND
2.627,0.266 3.166,0.409
0.539,0.142
10
5 V/DIV.
0.479,0.626 0.664,0.777
0.184,0.15
10
M-
1.323,1.82 1.996,1.967
0.672,0.147
10
1 ms./DIV.
| ECM Terminal Name | Between M- and ME01 |
| Tester Range | 5 V/DIV., 1 ms./DIV. |
| Condition | Idling with warm engine |
- HINT:
-
The duty ratio varies depending on the throttle actuator operation.
WAVEFORM 7
2.856,0.973 3.187,1.119
0.331,0.147
10
GND
2.631,0.216 3.176,0.36
0.545,0.144
10
5 V/DIV.
0.501,0.616 0.722,0.759
0.221,0.143
10
M+
1.323,1.806 1.995,1.965
0.672,0.159
10
1 ms./DIV.
| ECM Terminal Name | Between M+ and ME01 |
| Tester Range | 5 V/DIV., 1 ms./DIV. |
| Condition | Idling with warm engine |
- HINT:
-
The duty ratio varies depending on the throttle actuator operation.
WAVEFORM 8
2.604,0.25 3.229,0.406
0.625,0.156
10
false
10 V/DIV.
1.104,1.906 1.865,2.083
0.76,0.177
10
false
20 ms./DIV.
2.677,1.031 3.042,1.208
0.365,0.177
10
false
GND
| ECM Terminal Name | Between PRG and E01 |
| Tester Range | 10 V/DIV., 20 ms./DIV. |
| Condition | Idling with warm engine, under purge control |
- HINT:
-
If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more.
WAVEFORM 9
2.906,1 3.333,1.25
0.427,0.25
10
GND
2.896,1.615 3.292,1.833
0.396,0.219
10
GND
0.104,0.688 0.448,1.073
0.344,0.385
10
CH1 (IGT)
0.104,1.198 0.448,1.594
0.344,0.396
10
CH2 (IGF)
1.281,1.896 2.052,2.073
0.771,0.177
10
20 ms./DIV.
0.042,0.115 0.708,0.281
0.667,0.167
10
2 V/DIV.
| ECM Terminal Name | CH1: Between IGT (1 to 4) and E1
CH2: Between IGF1 and E1 |
| Tester Range | 2 V/DIV., 20 ms./DIV. |
| Condition | Idling with warm engine |
- HINT:
-
The wavelength becomes shorter as the engine speed increases.
WAVEFORM 10
0.104,0.083 1.333,0.281
1.229,0.198
10
false
5 V/DIV.
0.146,0.688 1.375,0.885
1.229,0.198
10
false
(G2+)
0.167,1.271 1.396,1.469
1.229,0.198
10
false
CH2
0.135,1.448 1.365,1.646
1.229,0.198
10
false
(NE+)
0.135,0.542 1.365,0.74
1.229,0.198
10
false
CH1
2.792,0.594 3.229,0.823
0.438,0.229
10
false
GND
2.781,1.396 3.219,1.625
0.438,0.229
10
false
GND
1.208,1.896 2.063,2.125
0.854,0.229
10
false
20 ms./DIV.
| ECM Terminal Name | CH1: Between G2+ and NE-
CH2: Between NE+ and NE- |
| Tester Range | 5 V/DIV., 20 ms./DIV. |
| Condition | Idling with warm engine |
- HINT:
-
The wavelength becomes shorter as the engine speed increases.
WAVEFORM 11
0.604,0.26 1.563,0.573
0.958,0.313
10
5 V/DIV.
0.51,1.125 1.021,1.385
0.51,0.26
10
GND
1.729,1.844 2.583,2.063
0.854,0.219
10
1 ms./DIV.
| ECM Terminal Name | Between OC1+ and OC1- |
| Tester Range | 5 V/DIV., 1 ms./DIV. |
| Condition | Idling |
WAVEFORM 12
0.719,1.594 1.177,1.792
0.458,0.198
10
GND
0.396,0.115 1.063,0.344
0.667,0.229
10
20 V/DIV.
1.833,1.896 2.646,2.083
0.813,0.188
10
20 ms./DIV.
| ECM Terminal Name | Between #10 (to #40) and E01 |
| Tester Range | 20 V/DIV., 20 ms./DIV. |
| Condition | Idling with warm engine |
- HINT:
-
The wavelength becomes shorter as the engine speed increases.
WAVEFORM 13
2.427,0.521 3.208,0.865
0.781,0.344
10
1 V/DIV.
2.615,1 3.115,1.292
0.5,0.292
10
GND
1.115,1.865 2.01,2.083
0.896,0.219
10
1 ms./DIV.
| ECM Terminal Name | Between KNK1 and EKNK |
| Tester Range | 1 V/DIV., 1 ms./DIV. |
| Condition | Engine speed maintained at 4000 rpm after warming up engine |
- HINT:
- ·
The wavelength becomes shorter as engine speed increases.
·The waveforms and amplitudes displayed differ slightly depending on the vehicle.
WAVEFORM 14
0.49,1.521 0.948,1.719
0.458,0.198
10
false
GND
0.438,0.188 1.167,0.417
0.729,0.229
10
false
0.2 V/DIV.
1.802,1.885 2.833,2.104
1.031,0.219
10
false
200 ms./DIV.
| ECM Terminal Name | Between OX1A and EX1A |
| Tester Range | 0.2 V/DIV., 200 ms./DIV. |
| Condition | Engine speed maintained at 2500 rpm for 2 minutes after warming up engine |
- HINT:
-
In the Data List, the items O2S B1S1 show the ECM input values of the heated oxygen sensor.