Engine Control (4AFE) - CelicaTech

* EGR CUT CONTROL SYSTEMTHE EGR CUT CONTROL SYSTEM CONTROLS THE VSV (FOR EGR) BY EVALUATING THE SIGNALS FROM EACH SENSOR INPUT TOTHE ECU (INPUT SIGNALS (1, 5, 6, 9)) AND BY SENDING OUTPUT TO TERMINAL EGR OF THE ECU.* A/C CUT CONTROL SYSTEMWHEN THE VEHICLE SUDDENLY ACCELERATES FROM LOW ENGINE SPEED, THIS SYSTEM CUTS OFF AIR CONDITIONEROPERATION FOR A FIXED PERIOD OF TIME IN RESPONSE TO THE VEHICLE SPEED, THROTTLE VALVE OPENING ANGLE ANDINTAKE MANIFOLD PRESSURE IN ORDER TO MAINTAIN ACCELERATION PERFORMANCE.THE ECU RECEIVES INPUT SIGNALS ((4, 5, 6, 7 AND 10)), AND OUTPUTS SIGNALS TO TERMINAL ACT.* OVERDRIVE CONTROL SYSTEMTHE ECU CONTROLS THE O/D SOLENOID OF THE AUTOMATIC TRANSAXLE IN RESPONSE TO SIGNALS FROM EACH SENSOR(INPUT SIGNALS (1, 4, 5, 6 AND 10)) IN ORDER TO MAINTAIN DRIVABILITY AND ACCELERATION PERFORMANCE.THE ECU OUTPUTS A SIGNAL FROM TERMINAL OD TO CONTROL THE O/D SOLENOID.3. DIAGNOSIS SYSTEMWITH THE DIAGNOSIS SYSTEM, WHEN THERE IS A MALFUNCTIONING IN THE ECU SIGNAL SYSTEM, THE MALFUNCTION SYSTEMIS RECORDED IN THE MEMORY. THE MALFUNCTIONING SYSTEM CAN THEN BE FOUND BY READING THE DISPLAY (CODE) OFTHE CHECK ENGINE WARNING LIGHT.4. FAIL–SAFE SYSTEMWHEN A MALFUNCTION OCCURS IN ANY SYSTEM, IF THERE IS A POSSIBILITY OF ENGINE TROUBLE BEING CAUSED BYCONTINUED CONTROL BASED ON THE SIGNALS FROM THAT SYSTEM, THE FAIL–SAFE SYSTEM EITHER CONTROLS THE SYSTEMBY USING DATA (STANDARD VALUES) RECORDED IN THE ECU MEMORY OR ELSE STOPS THE ENGINE.SERVICE HINTSE 5, E 8 ENGINE ECUVOLTAGE AT ECU WIRING CONNECTORSBATT–E1: ALWAYS 10.0–14.0 VOLTS+B–E1: 10.0–14.0 VOLTS (IGNITION SW AT ON POSITION)+B1–E1: 10.0–14.0 VOLTS (IGNITION SW AT ON POSITION)IDL–E1: 8.0–14.0 VOLTS (IGNITION SW ON AND THROTTLE VALVE OPEN)PSW–E1: 4.0–5.0 VOLTS (IGNITION SW ON AND THROTTLE VALVE FULLY CLOSED)PIM–E2: 3.3–3.9 VOLTS (IGNITION SW AT ON POSITION)VCC–E2: 4.5–5.5 VOLTS (IGNITION SW AT ON POSITION)#10, #20–E01, E02 : 10.0–14.0 VOLTS (IGNITION SW AT ON POSITION)THA–E2: 1.0–3.0 VOLTS (IGNITION SW ON AND INTAKE AIR TEMP. 20°C (68°F))THW–E2: 0.1–1.0 VOLTS (IGNITION SW ON AND COOLANT TEMP. 80°C (176°F)STA–E1: 6.0–14.0 VOLTS (ENGINE CRANKING)IGT–E1: 0.7–1.0 VOLTS (ENGINE CRANKING OR IDLING)W–E1: 10.0–14.0 VOLTS (IGNITION SW ON, NO TROUBLE AND ENGINE RUNNING)A/C–E1: 8.0–14.0 VOLTS (IGNITION SW ON AND AIR CONDITIONING ON)ACT–E1: 4.0–6.0 VOLTS (IGNITION SW ON AND HEATER BLOWER SW ON)T–E1: 10.0–14.0 VOLTS (IGNITION SW ON AND CHECK CONNECTOR T–E1 NOT CONNECTED): 0.5 OR LESS (IGNITION SW ON AND CHECK CONNECTOR T–E1 CONNECTOR)NSW–E1: 0–2.0 VOLTS (IGNITION SW ON AND NEUTRAL START SW POSITION P OR N RANGE): 10.0–14.0 VOLTS (IGNITION SW ON AND EX. NEUTRAL START SW POSITION P OR N RANGE)V–ISC–E1: 10.0–14.0 VOLTS (ORANKING FOR 10 SECONDS AFTER STARTING)RESISTANCE AT ECU WIRING CONNECTORS(DISCONNECT WIRING CONNECTOR)IDL–E2: INFINITY (THROTTLE VALVE OPEN)0 Ω (THROTTLE VALVE FULLY CLOSED)PSW–E2: 0 Ω (THROTTLE VALVE FULLY OPEN)INFINITY (THROTTLE VALVE FULLY CLOSED)THA–E1: 2.0 – 3.0 KΩ (INTAKE AIR TEMP. 20°C, 68°F)THW–E1: 0.2 – 0.4 KΩ (COOLANT TEMP. 80°C, 176°F)G1, NE–G–E : 0.17–0.21 KΩISCC–+B: 19.–3–22.3 ΩISCO–+B75

ENGINE CONTROL (4A–FE)(USA)B–WW4 AM1ST1 7B–WB–OB–R10AM2IG29FROM POWER SOURCE SYSTEM (SEE PAGE 52)B–YB–Y10 IE1 17 IE11 EB1W WB–R5 2E 6 2E22B3B–R2BI12IGNITION SWW–BB–O B–OB–OE7EFI MAINRELAY73B–O811H2E7. 5AIGN425 2A 4 2CB–Y107PP22CIG2ABATT#2015AEFIB–YE7B–YE5 A ,E8ENGINE ECU#10E7BVCCB–YL–B B–Y121PIMBEGRE7:CALIFORNIAE5:EX. CALIFORNIAB–YV1VSV(FOR EGRSYSTEM)25 B 12 B 18 B 4 BINJECTOR6 3E5B–OE740A FL AM1100A FL ALT30A FL AM2F10FUSIBLE LINKBOXB–OB–OB–OB–O2222I7 I8 I9 I10NO. 1 NO. 2 NO. 3 NO. 4YWP–LGR–BBR1B1W1Y1W1YE5WE53 2 1FL MAIN 2. 0LE5YVC PIM EE5WV3VACUUM SENSORBATTERYEB76

B–WB–WB–OB–YB–YB–Y B–Y18B–YE5IG2I6B–WB–WBB–YB–YB–YFROM POWER SOURCESYSTEM (SEE PAGE 52)I1 A ,I2IIABB–Y15AGAUGE21LV2VSV(FOR ELECTRICALIDLE–UP SYSTEM)B–YB–Y5R–L1EJ/B NO. 3C13 B ,C149 3B CHECK ENGINE[ COMB. METER]R–L7 3A BA1 2AADISTRIBUTORIGNITER1 B 4 B 2 B 6 B 5 BPBB–YWRB(SEALED)14 B9 A 1 A10 A6 B 7 B 21 B 8 B 9 BVISC +B +B1 W IGT IGF NE G1 G–E5 A ,E8ENGINE ECUBTHATHW E21 E2THG IDL PSW OD ODHT OX5 B 3 B 22 B 16 B 20 B 19 B 17 B 15 A 15 B 15 B 10 BI6IN–AIR TEMP.SENSORGR21BRE2EFI WATER TEMP.SENSORR21BRBRBRE3EGR GAS TEMP. SENSOR(FOR CALIFORNIA)L21BRPP–BY–B5Y–B Y–BIG2P–BWWI7W(SEALED)(SEALED)WBR BR BRE7 E5 I7 E5BRBRE7T1THROTTLEPOSITIONSENSORBRIDL1 32PSWTO O/D SOLENOID,CRUISE CONTROL ECU(EX. CALIFORNIA)TO O/D DIODE, O/D SOLENOID(CALIFORNIA)OXYGEN SENSOR(FOR EX. CALIFORNIA)E HTRE HTRBO62HTR34+11 2O5OXYGEN SENSOR(FOR CALIFORNIA)B–YBRBR77

ENGINE CONTROL (4A–FE)B–W(USA M/T)B–WBI84B–W B–W B–WEB1E5(A/T)(USA M/T)B–Y(CANADA M/T)B–WI8B–YB–YB–WB–WB–W3LG–BLG–BIJ1162D2CE98 18 1 36 9 44 IG19 IG28 IG27 A 12 A2 B 8 A16 A13TO A/C AMPLIFIERACTB26B–WB–WB–WBTOA/C MAGNET CLUTCHA/CE5 A ,E8ENGINE ECUB–W(A/T)BC1CHECK CONNECTORAB–YOOBABL–B+B IG– FP E1TE1V–YV–YVF1E01 E02 E1 SPD FC STA24BNSW13T411VFBTO TACHOMETERWOX119IG2(SEALED)BRB–YN1NEUTRALSTART SWL–BBPN21BB–Y(A/T)2204 42 14 34 4B B B BEB1I7IG2BSTARTERRELAYWBRL–WGB23BRI7I7BBJ2JUNCTIONCONNECTORGC10CIRCUITOPENINGRELAY1 4 5W–BW–BBRBRI7E7L–W65C14A(SEALED)SPEED SENSOR[COMB. METER]I2:USAI6:CANADA15L–B L–BIF112C12CLUTCHSTART SWB–YL–BBRBRBRBRE7J6JUNCTIONCONNECTOR(FOR EARTH)BRAF16FUEL PUMP6J/B NO.3A W–B44W–B21A1E3BA 42W–BMW–BW–BECIDBIIG78

C1 DARK GRAY C10 DARK GRAY C12C13 B BROWN1 X 3 4 XX 6 X X1 2 34 5 1 2 3 X X X8 9 X X X18C14AE2GREEN E3 DARK GRAY E5 A DARK GRAY1 21 2 1 2 X 4 X X 7 8X 5 6 7 X X910X12 13X15 16E8 B DARK GRAY F10 BLACK F16 DARK GRAY I1 A DARK GRAY I2 B DARK GRAY1 2 3 4 5 6 7 8 9 10 11 12 1314 15 16 17 18 19 20 21 22 X 24 25 2613 6X X2X 61 21 2 X4 5 6I6 BLACK I7,I8,I9,I10 GRAY I12 BLACKJ2BB1 2 1 2X 7 X 9410BB(HINT : SEE PAGE 7)J6 N1 GRAY O5 DARK GRAY O6 DARK GRAY T1 BLACKAAA A A A1 21 224131 2 3(HINT : SEE PAGE 7)V1 BROWN V2 BLUE V3 BLACK1 21 21 2 379

ENGINE CONTROL (4A–FE)SERVICE HINTSE 5, E 8 ENGINE ECUVOLTAGE AT ECU WIRING CONNECTORSBATT–E1: ALWAYS 10.0–14.0 VOLTS+B–E1: 10.0–14.0 VOLTS (IGNITION SW AT ON POSITION)+B1–E1: 10.0–14.0 VOLTS (IGNITION SW AT ON POSITION)IDL–E1: 8.0–14.0 VOLTS (IGNITION SW ON AND THROTTLE VALVE OPEN)PSW–E1: 4.0–5.0 VOLTS (IGNITION SW ON AND THROTTLE VALVE FULLY CLOSED)PIM–E2: 3.3–3.9 VOLTS (IGNITION SW AT ON POSITION)VCC–E2: 4.5–5.5 VOLTS (IGNITION SW AT ON POSITION)#10, #20–E01, E02 : 10.0–14.0 VOLTS (IGNITION SW AT ON POSITION)THA–E2: 1.0–3.0 VOLTS (IGNITION SW ON AND INTAKE AIR TEMP. 20°C (68°F))THW–E2: 0.1–1.0 VOLTS (IGNITION SW ON AND COOLANT TEMP. 80°C (176°F)STA–E1: 6.0–14.0 VOLTS (ENGINE CRANKING)IGT–E1: 0.7–1.0 VOLTS (ENGINE CRANKING OR IDLING)W–E1: 10.0–14.0 VOLTS (IGNITION SW ON, NO TROUBLE AND ENGINE RUNNING)A/C–E1: 8.0–14.0 VOLTS (IGNITION SW ON AND AIR CONDITIONING ON)ACT–E1: 4.0–6.0 VOLTS (IGNITION SW ON AND HEATER BLOWER SW ON)T–E1: 10.0–14.0 VOLTS (IGNITION SW ON AND CHECK CONNECTOR TE1–E1 NOT CONNECTED): 0.5 OR LESS (IGNITION SW ON AND CHECK CONNECTOR TE1–E1 CONNECTOR)NSW–E1: 0–2.0 VOLTS (IGNITION SW ON AND NEUTRAL START SW POSITION P OR N RANGE): 10.0–14.0 VOLTS (IGNITION SW ON AND EX. NEUTRAL START SW POSITION P OR N RANGE)V–ISC–E1: 10.0–14.0 VOLTS (CRANKING FOR 10 SECONDS AFTER STARTING)RESISTANCE AT ECU WIRING CONNECTORS(DISCONNECT WIRING CONNECTOR)IDL–E2: INFINITY (THROTTLE VALVE OPEN)0 Ω (THROTTLE VALVE FULLY CLOSED)PSW–E2: 0 Ω (THROTTLE VALVE FULLY OPEN)INFINITY (THROTTLE VALVE FULLY CLOSED)THA–E1: 2.0 – 3.0 KΩ (INTAKE AIR TEMP. 20°C, 68°F)THW–E1: 0.2 – 0.4 KΩ (COOLANT TEMP. 80°C, 176°F)G1, NE–G– : 0.17–0.21 KΩISCC–+B: 19.3–22.3 ΩISCO–+B: 19.3–22.3 Ω: PARTS LOCATIONCODE SEE PAGE CODE SEE PAGE CODE SEE PAGEC 1 27 (4A–FE) F16 30 (L/B), 31 (C/P) J 6 29C10 28 I 1 A 27 (4A–FE) N I 27 (4A–FE)C12 28 I 2 B 27 (4A–FE) O 5 27 (4A–FE)C13 B 28 I 6 27 (4A–FE) O 6 27 (4A–FE)C14 A 28 I 7 27 (4A–FE) T 1 27 (4A–FE)E 2 27 (4A–FE) I 8 27 (4A–FE) V 1 27 (4A–FE)E 3 27 (4A–FE) I 9 27 (4A–FE) V 2 27 (4A–FE)E 5 A 29 I10 27 (4A–FE) V 3 27 (4A–FE)E 8 B 29 I12 29F10 27 (4A–FE) J 2 29: RELAY BLOCKSCODE SEE PAGE RELAY BLOCKS (RELAY BLOCK LOCATION)4 24 R/B NO. 4 (RIGHT KICK PANEL): JUNCTION BLOCK AND WIRE HARNESS CONNECTORCODE SEE PAGE JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)1A1E18 COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)1H 18 ENGINE ROOM MAIN WIRE AND J/B NO. 1 (LEFT KICK PANEL)2A 20 ENGINE ROOM MAIN WIRE AND J/B NO. 2 (NEAR THE BATTERY)2B2C20 ENGINE WIRE AND J/B NO. 2 (NEAR THE BATTERY)2D2E20 ENGINE ROOM MAIN WIRE AND J/B NO. 2 (NEAR THE BATTERY)3B 22 COWL WIRE AND J/B NO. 3 (BEHIND COMBINATION METER)80

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESSCODE SEE PAGE JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)EB1 34 (4A–FE) ENGINE WIRE AND COWL WIRE (REAR SIDE OF RIGHT FRONT FENDER)IE1 36 ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)IF1 36 FLOOR WIRE AND COWL WIRE (LEFT KICK PANEL)IG1IG236 ENGINE WIRE AND COWL WIRE (UNDER THE ENGINE ECU)IJ1 36 COWL WIRE AND A/C NO. 1 WIRE (BEHIND THE GLOVE BOX): GROUND POINTSCODE SEE PAGE GROUND POINTS LOCATIONEB 34 (4A–FE) FRONT LEFT FENDEREC 34 (4A–FE) INTAKE MANIFOLDID 36 LEFT KICK PANELIG 36 R/B NO. 4 SET BOLTBI 38 (L/B) UNDER THE LEFT CENTER PILLAR: SPLICE POINTSCODE SEE PAGE WIRE HARNESS WITH SPLICE POINTS CODE SEE PAGE WIRE HARNESS WITH SPLICE POINTSE 5 I 6 36 COWL WIREE 7 34 (4A–FE) ENGINE WIREI 7 36 ENGINE WIREE 9I 8 36 COWL WIREI 2 36 COWL WIRE81