Brand:
Toyota
Model Name:
4Runner GRN210 215 UZN210 215
Manual:
Repair Manual
Section:
1Gr-Fe Engine Control System
Title:
Sfi System
- HINT:
- The standard normal voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard normal voltage for that pair of terminals, displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.
| Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specified Condition |
| BATT (E8-3) - E1 (E6-1) | L - BR | Battery (for measuring the battery voltage and for the ECM memory) | Always | 9 to 14 V |
| +BM (E8-7) - E1 (E6-1) | GR - BR | Power source of throttle motor | Always | 9 to 14 V |
| IGSW (E8-9) - E1 (E6-1) | B-O - BR | Ignition switch | Ignition switch ON | 9 to 14 V |
| +B (E8-1) - E1 (E6-1) | B - BR | Power source of ECM | Ignition switch ON | 9 to 14 V |
| +B2 (E8-2) - E1 (E6-1) | B - BR | Power source of ECM | Ignition switch ON | 9 to 14 V |
| OC1+ (E6-17) - OC1- (E6-16) | G-Y - L-B | Camshaft timing oil control valve (OCV) | Ignition switch ON | Pulse generation (see waveform 1) |
| OC2+ (E6-15) - OC2- (E6-14) | L-W - L-R | Camshaft timing oil control valve (OCV) | Ignition switch ON | Pulse generation (see waveform 1) |
| MREL (E8-8) - E1 (E6-1) | W-G - BR | EFI relay | Ignition switch ON | 9 to 14 V |
| VC (E4-23) - E2 (E4-28) | L-R - BR | Power source for sensors (specific voltage) | Ignition switch ON | 4.5 to 5.0 V |
| VG (E4-30) - E2G (E4-29) | R-Y - R-W | Mass air flow meter | Idling, Shift lever position P or N, A/C switch OFF | 0.5 to 3.0 V |
| THA (E4-22) - E2 (E4-28) | R-B - BR | Intake air temperature sensor | Idling, Intake air temperature 20°C (68°F) | 0.5 to 3.4 V |
| THW (E4-21) - E2 (E4-28) | B-L - BR | Engine coolant temperature sensor | Idling, Engine coolant temperature 80°C (176°F) | 0.2 to 1.0 V |
| VTA1 (E4-20) - E2 (E4-28) | G-B - BR | Throttle position sensor (for engine control) | Ignition switch ON, Throttle valve fully closed | 0.5 to 1.2 V |
| VTA1 (E4-20) - E2 (E4-28) | G-B - BR | Throttle position sensor (for engine control) | Ignition switch ON, Throttle valve fully open | 3.2 to 4.8 V |
| VTA2 (E4-19) - E2 (E4-28) | G-W - BR | Throttle position sensor (for sensor malfunction detection) | Ignition switch ON, Accelerator pedal released | 2.1 to 3.1 V |
| VTA2 (E4-19) - E2 (E4-28) | G-W - BR | Throttle position sensor (for sensor malfunction detection) | Ignition switch ON, Accelerator pedal depressed | 4.5 to 5.0 V |
| VPA (E8-18) - EPA (E8-20) | W-R - LG-B | Accelerator pedal position sensor (for engine control) | Ignition switch ON, Accelerator pedal released | 0.5 to 1.1 V |
| VPA (E8-18) - EPA (E8-20) | W-R - LG-B | Accelerator pedal position sensor (for engine control) | Ignition switch ON, Accelerator pedal depressed | 2.6 to 4.5 V |
| VPA2 (E8-19) - EPA2 (E8-21) | R-B - V-W | Accelerator pedal position sensor (for sensor malfunction detection) | Ignition switch ON, Accelerator pedal released | 1.2 to 2.0 V |
| VPA2 (E8-19) - EPA2 (E8-21) | R-B - V-W | Accelerator pedal position sensor (for sensor malfunction detection) | Ignition switch ON, Accelerator pedal depressed | 3.4 to 5.0 V |
| VCPA (E8-26) - EPA (E8-20) | B-Y - LG-B | Power source of accelerator pedal position sensor (for VPA) | Ignition switch ON | 4.5 to 5.0 V |
| VCP2 (E8-27) - EPA2 (E8-21) | W-L - V-W | Power source of accelerator pedal position sensor (for VPA2) | Ignition switch ON | 4.5 to 5.0 V |
| HA1A (E5-2) - E04 (E5-7) HA2A (E5-1) - E05 (E5-6) | R-L - W-B B-W - W-B | A/F sensor heater | Idling | Below 3.0 V |
| HA1A (E5-2) - E04 (E5-7) HA2A (E5-1) - E05 (E5-6) | R-L - W-B B-W - W-B | A/F sensor heater | Ignition switch ON | 9 to 14 V |
| A1A+ (E5-22) - E1 (E6-1) | P - BR | A/F sensor | Ignition switch ON | 3.3 V*1 |
| A1A+ (E5-22) - E1 (E6-1) | P - BR | A/F sensor | Ignition switch ON | 3.0 V*1 |
| A2A+ (E5-23) - E1 (E6-1) | Y - BR | A/F sensor | Ignition switch ON | 3.3 V*1 |
| A2A+ (E5-23) - E1 (E6-1) | Y - BR | A/F sensor | Ignition switch ON | 3.0 V*1 |
| A1A- (E5-30) - E1 (E6-1) | L - BR | A/F sensor | Ignition switch ON | 3.3 V*1 |
| A1A- (E5-30) - E1 (E6-1) | L - BR | A/F sensor | Ignition switch ON | 3.0 V*1 |
| A2A- (E5-31) - E1 (E6-1) | BR - BR | A/F sensor | Ignition switch ON | 3.3 V*1 |
| A2A- (E5-31) - E1 (E6-1) | BR - BR | A/F sensor | Ignition switch ON | 3.0 V*1 |
| HT1B (E4-1) - E1 (E6-1) HT2B (E5-5) - E1 (E6-1) | G - BR L - BR | Heated oxygen sensor heater | Idling | Below 3.0 V |
| HT1B (E4-1) - E1 (E6-1) HT2B (E5-5) - E1 (E6-1) | G - BR L - BR | Heated oxygen sensor heater | Ignition switch ON | 9 to 14 V |
| OX1B (E4-18) - E2 (E4-28) OX2B (E5-33) - E2 (E4-28) | W - BR B - BR | Heated oxygen sensor | Maintain engine speed at 2,500 rpm for 2 minutes after warming up | Pulse generation (see waveform 2) |
| #10 (E6-2) - E01 (E4-7) #20 (E6-3) - E01 (E4-7) #30 (E6-4) - E01 (E4-7) #40 (E6-5) - E01 (E4-7) #50 (E6-6) - E01 (E4-7) #60 (E6-7) - E01 (E4-7) | R-L - BR B - BR R - BR G - BR Y - BR L - BR | Injector | Ignition switch ON | 9 to 14 V |
| #10 (E6-2) - E01 (E4-7) #20 (E6-3) - E01 (E4-7) #30 (E6-4) - E01 (E4-7) #40 (E6-5) - E01 (E4-7) #50 (E6-6) - E01 (E4-7) #60 (E6-7) - E01 (E4-7) | R-L - BR B - BR R - BR G - BR Y - BR L - BR | Injector | Idling | Pulse generation (see waveform 3) |
| KNK1 (E5-29) - EKNK (E5-28) | B -W | Knock sensor | Maintain engine speed at 4,000 rpm after warming up | Pulse generation (see waveform 4) |
| KNK2 (E5-21) - EKN2 (E5-20) | G - R | Knock sensor | Maintain engine speed at 4,000 rpm after warming up | Pulse generation (see waveform 4) |
| VV1+ (E6-19) - VV1- (E6-29) | R - G | Variable valve timing (VVT) sensor | Idling | Pulse generation (see waveform 5) |
| VV2+ (E6-18) - VV2+ (E6-28) | Y - L | Variable valve timing (VVT) sensor | Idling | Pulse generation (see waveform 5) |
| NE+ (E6-21) - NE- (E6-20) | B -W | Crankshaft position sensor | Idling | Pulse generation (see waveform 5) |
| IGT1 (E4-8) - E1 (E6-1) IGT2 (E4-9) - E1 (E6-1) IGT3 (E4-10) - E1 (E6-1) IGT4 (E4-11) - E1 (E6-1) IGT5 (E4-12) - E1 (E6-1) IGT6 (E4-13) - E1 (E6-1) | Y-R - BR P-L - BR LG - BR LG-B - BR GR - BR L - BR | Ignition coil with igniter (ignition signal) | Idling | Pulse generation (see waveform 6) |
| IGF1 (E4-24) - E1 (E6-1) | W-R - BR | Ignition coil with igniter (ignition confirmation signal) | Ignition switch ON | 4.5 to 5.0 V |
| IGF1 (E4-24) - E1 (E6-1) | W-R - BR | Ignition coil with igniter (ignition confirmation signal) | Idling | Pulse generation (see waveform 6) |
| PRG (E4-34) - E1 (E6-1) | G-Y - BR | EVAP VSV | Ignition switch ON | 9 to 14 V |
| PRG (E4-34) - E1 (E6-1) | G-Y - BR | EVAP VSV | Idling | Pulse generation (see waveform 7) |
| SPD (E7-8) - E1 (E6-1) | V-R - BR | Speed signal from combination meter | Ignition switch ON, Rotate driving wheel slowly | Pulse generation (see waveform 8) |
| STA (E6-11) - E1 (E6-1) | B-Y - BR | Starter signal | Cranking | 9 to 14 V |
| STAR/NSW (E5-8) - E1 (E6-1) | P - BR | Park/neutral position switch signal | Ignition switch ON, Other shift position in P, N | 9 to 14 V |
| STAR/NSW (E5-8) - E1 (E6-1) | P - BR | Park/neutral position switch signal | Ignition switch ON, Shift position in P, N | 0 to 3.0 V |
| STSW (E6-12) - E1 (E6-1) | L-Y - BR | Ignition switch signal | Shift lever position P or N, ignition switch START | 6.0 V or more |
| STP (E8-15) - E1 (E6-1) | G-Y - BR | Stop light switch | Brake pedal depressed | 7.5 to 14 V |
| STP (E8-15) - E1 (E6-1) | G-Y - BR | Stop light switch | Brake pedal released | Below 1.5 V |
| ST1- (E8-16) - E1 (E6-1) | R-L - BR | Stop light switch (opposite to STP terminal) | Ignition switch ON, Brake pedal depressed | Below 1.5 V |
| ST1- (E8-16) - E1 (E6-1) | R-L - BR | Stop light switch (opposite and STP terminal) | Ignition switch ON, Brake pedal released | 7.5 to 14 V |
| M+ (E4-5) - ME01 (E5-3) | P -W-B | Throttle motor | Idling with warm engine | Pulse generation (see waveform 9) |
| M- (E4-4) - ME01 (E5-3) | L - W-B | Throttle motor | Idling with warm engine | Pulse generation (see waveform 10) |
| FC (E8-10) - E1 (E6-1) | GR-B - BR | Fuel pump control | Ignition switch ON | 9 to 14 V |
| FPR (E6-30) - E1 (E6-1) | Y-B - BR | Fuel pump control | Ignition switch ON | 9 to 14 V |
| W (E7-30) - E1 (E6-1) | R-B - BR | MIL | Ignition switch ON | Below 3.0 V |
| W (E7-30) - E1 (E6-1) | R-B - BR | MIL | Idling | 9 to 14 V |
| ELS1 (E7-13) - E1 (E6-1) | Y-G - BR | Electric load | Defogger switch OFF | 0 to 1.5 V |
| ELS1 (E7-13) - E1 (E6-1) | Y-G - BR | Electric load | Defogger switch ON | 7.5 to 14 V |
| ELS2 (E7-12) - E1 (E6-1) | G - BR | Electric load | Taillight switch OFF | 0 to 1.5 V |
| ELS2 (E7-12) - E1 (E6-1) | G - BR | Electric load | Taillight switch ON | 7.5 to 14 V |
| TC (E8-23) - E1 (E6-1) | P-L - BR | Terminal TC of DLC 3 | Defogger switch ON | 9 to 14 V |
| TACH (E7-1) - E1 (E6-1) | B-W - BR | Engine speed | Idling | Pulse generation see waveform 11) |
| ACIS (E4-33) - E1 (E6-1) | W-L - BR | VSV for ACIS | Ignition switch ON | 9 to 14 V |
| PSW (E6-10) - E1 (E6-1) | G-W - BR | P/S pressure switch | Ignition switch ON | 9 to 14 V |
| VPMP (E8-5) - E1 (E6-1) | R-G - BR | Vent valve (built into pump module) | Ignition switch ON | 9 to 14 V |
| MPMP (E8-6) - E1 (E6-1) | O - BR | Vacuum pump (built into pump module) | Vacuum pump OFF | 0 to 3 V |
| MPMP (E8-6) - E1 (E6-1) | O - BR | Vacuum pump (built into pump module) | Vacuum pump ON | 9 to 14 V |
| PPMP (E8-22) - E2 (E4-28) | R - BR | Pressure sensor (built into pump module) | Ignition switch ON | 3 to 3.6 V |
| F/PS (E7-32) - E1 (E6-1) | L - BR | Airbag sensor assembly | Idling with warm engine | Pulse generation (see waveform 12) |
- HINT:
- *1: The ECM terminal voltage is constant regardless of the output voltage from the sensor.
WAVEFORM 1
 |
| ECM Terminal Names | Between OC1+ and OC1- or OC2+ and OC2- |
| Tester Ranges | 5 V/DIV, 1 msec./DIV |
| Conditions | Idling |
- HINT:
- The wavelength becomes shorter as the engine rpm increases.
WAVEFORM 2
 |
| ECM Terminal Names | Between OX1B and E2 or OX2B and E2 |
| Tester Ranges | 0.2 V/DIV, 200 msec./DIV |
| Conditions | Engine speed maintained 2,500 rpm for 2 minutes after warming up sensor |
- HINT:
- In the DATA LIST, item O2S B1S2 shows the ECM input values from the heated oxygen sensor.
WAVEFORM 3
 |
| ECM Terminal Names | Between #10 (to 60) and E01 |
| Tester Ranges | 30 V/DIV, 20 msec./DIV |
| Conditions | Idling |
- HINT:
- The wavelength becomes shorter as the engine rpm increases.
WAVEFORM 4
 |
| ECM Terminal Names | Between KNK1 and EKNK or KNK2 and EKN2 |
| Tester Ranges | 0.01 to 10 V/DIV, 0.01 to 10 msec./DIV |
| Conditions | Maintain engine speed 4,000 rpm after warming up engine |
- HINT:
- The wavelength becomes shorter as the engine rpm increases.
- The waveforms and amplitudes displayed differ slightly depending on the vehicle.
WAVEFORM 5
 |
VVT sensor
Crankshaft position sensor
ECM Terminal Names (a) Between NE+ and NE-
(b) Between VV1+ and VV1- or VV2+ and VV2-Tester Ranges 2 V/DIV, 20 msec./DIV Conditions Idling - HINT:
- The wavelength becomes shorter as the engine rpm increases.
WAVEFORM 6
 |
Igniter IGT signal (from ECM to igniter)
Igniter IGF signal (from igniter to ECM)
ECM Terminal Names (a) Between IGT (1 to 6) and E1
(b) Between IGF1 and E1Tester Ranges 2 V/DIV, 20 msec./DIV Conditions Idling - HINT:
- The wavelength becomes shorter as the engine rpm increases.
WAVEFORM 7
 |
| ECM Terminal Names | Between PRG and E01 |
| Tester Ranges | 5 V/DIV, 50 msec./DIV |
| Conditions | Idling |
- HINT:
- If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more.
WAVEFORM 8
 |
| ECM Terminal Names | Between SPD and E1 |
| Tester Ranges | 5 V/DIV, 20 msec./DIV |
| Conditions | Driving at 12 mph (20 km/h) |
- HINT:
- The wavelength becomes shorter as the vehicle speed increases.
WAVEFORM 9
 |
| ECM Terminal Names | Between M+ and ME01 |
| Tester Ranges | 5 V/DIV, 1 msec./DIV |
| Conditions | Idling with warm engine |
- HINT:
- The duty ratio varies depending on the throttle actuator operation.
WAVEFORM 10
 |
| ECM Terminal Names | Between M- and ME01 |
| Tester Ranges | 5 V/DIV, 1 msec./DIV |
| Conditions | Idling with warm engine |
- HINT:
- The duty ratio varies depending on the throttle actuator operation.
WAVEFORM 11
 |
| ECM Terminal Names | Between TACH and E1 |
| Tester Ranges | 5 V/DIV, 10 msec./DIV |
| Conditions | Idling |
- HINT:
- The wavelength becomes shorter as the engine rpm increases.
WAVEFORM 12
 |
| ECM Terminal Names | Between F/PS and E1 |
| Tester Ranges | 5 V/DIV, 500 msec./DIV |
| Conditions | Idling with warm engine |