EFI SYSTEMEF-2 Revised on “98 Oct. 1. SYSTEM DESCRIPTION 1.1 LOCATION OF ELECTRONIC CONTROL PARTS Vehicle speed sensor Intake air temperature sengo Ignition coll Cam angle sensor Inertia sensor (onty for M100 series) control computer Variable resister sensor (only for leaded spec.) Neutral start switch NOTE: Water temperature sensor * This figure shows the location for the M100 vehicle. In the case of the L701 vehicle, the location is virtually the same. 1.2 SYSTEMATIC DIAGRAM 4.2.1 SPECIFICATIONS OF SYSTEM FOR UNLEADED GASOLINE Ignition coi Linear throttle sensor ‘Air cleaner [3 way catalystRevised on ’98 Oct, EF-3 1.2.2 SPECIFICATIONS OF SYSTEM FOR LEADED GASOLINE Ignition coil Vehicle speed sensor. 1.3 DIAGNOSIS SYSTEM DESCRIPTION A self-diagnosis system is builtin the ECU. If any abnormality should occur in the signal systems of various sensors, the self-diagnosis system memorizes the malfunction code num- ber in the ECU: In respect to important abnormalities, the check engine lamp at the instrument panel goes on, thus warning the driver of the abnormality. When the abnormality is cleared, the check engine lamp goes out. ‘When the Test terminal of the diagnosis connector is connect- ed with the earth terminal, the malfunction code number that has been memorized in the ECU will be indicated in a form of blinking of the check engine lamp in the instrument panel with the ignition switch turned "ON" position. CHECK ENGINE LAMP 1. When the ignition switch is turned on, the check engine lamp goes on. (The engine is under a stopped state.) 2. When the engine starts, the check engine lamp goes off If the check engine lamp remains illuminated, it indicates that the diagnosis system has detected system malfunc- tion nose fect EcssieeeEF-5 Revised on ‘98 Oct. (2) When plural matfunction codes are indicated: In cases where plural malfunction codes have been ‘In case of malfunction code number 21 and 31 detected, the two-digit diagnosis codes are indicated in the sequence of the code number, starting from a ‘smaller number. Each diagnosis code is indicated in ane the above described pattern. A pause of 2.5 seconds ‘occurs between the outputs of respective diagnosis codes, thus separating one from the others. After allof | gS acenca sn the plural diagnosis codes that have been detected are indicated, the check engine lamp is extinguished for four seconds. Then, the detected plural diagnosis. ET codes will be indicated again. 3. Canesling method of diagnosis code (1) Erasure by disconnecting EF! fuse To erase the diagnosis codes memorized in the ECU after malfunctions have been repaired, disconnect the EFI fuse from the relay block for at least 30 seconds with the ignition switch turned OFF. [When ambient temperature is about 20°C.) NOTE: + After the diagnosis codes have been read, remove the SST at the check connector. + Itis possible to complete this erasing for approximately 30 seconds. In some cases, however, it may take longer. Furthermore, the erasing can be made by disconnect- ing the circuit, such as the battery power supply and fusible link. In cases where the battery terminal is to be disconnected, record the radio channels in advance. After completion of the operation, set the radio chan- nels the same as before. Tec (2) Erasure by diagnosis tester (DS-21) Connect the diagnosis tester (DS-21) to the exclusive connector provided in front of the driver's seat. Erase the diagnosis codes by the “malfunction code erasing function” of the “individual function.”Revised on “98 Oct. EF-7 1.4.2 Diagnosis through inquiries ‘The diagnosis through inquiries is to collect information from the customer before confirming the maifunc- tion phenomena, The diagnosis through inquiries proves to be very important clues ln reproducing mal- function phenomena. Since the information obtained by the diagnosis through inquiries is referred to during the trouble shooting, it is imperative to make an inquiry of the customer, centering on the items related to the malfunction, in- stead of simply carrying out the diagnosis through inquiries. 1.4.3 Confirmation, record and erasure of diagnosis code When the diagnosis abnormality code is indicated, confirm whether the malfunction took place in the sys- tem or is taking place now. Also it is necessary to check any relation between the code and the reproduced malfunction. For this purpose, the diagnosis code should be indicated twice; in other words before and after the confirmation of the phenomena. xray? son 1.4.4 Confirmation of reproduction of malfunction phenomena In carrying out the trouble shooting, it is imperative to reproduce the malfunction phenomena by creating conditions and environments similar to the situation where the malfunction took place, based on the infor- mation obtained by the diagnosis through inquiries. As for the phenomenon that is hard to be reproduced, itis most important to try to reproduce it patiently by applying external factors, such as vibration (moving wire hamesses or relays by hand), heat (applying hot wind) and water (giving humidity) ‘Moreover, if you presume sections (parts) which may have caused the malfunction, connect a tester, etc. to ‘them and check to see if the malfunction takes place, you can evaluate whether the sections (parts) are functioning properly or not, too. ronsbooer| 1.4.5 Basic check A. Hints for basic check 1. In most cases, engine troubles are attributable to systems other than the EFI system. (1) Battery voltage, fuse blown or fusible link blown: (2) Body earth. (3) Fuel leakage, fuel filter clogged or fuel pump malfunc- tioning. (4) Spark plugs faulty, ignition coil faulty, or ignition timing adjusted improperly. (5) Admission of alrEF-9 Reyised on ‘98 Oct. 3. Check the fuel pump relay. (a) When the ignition switch is set to the "ON" position, check to see if the relay emits an operating sound, (b) Remove the fuel pump relay from the relay box. Check that there is continuity between the terminals 1 and 2. Specified Resistance: 74-1170 (c) Check that there is continuity between the terminals 3 and 4 when a voltage of 12 V is applied to across the terminals 1 and 2. 4. Check of inertia sensor for fuel cut. (Only for M100 series) ‘Check that the inertia sensor is functioning. (a) Turn OFF the ignition switch. (b) Slide the front seat (driver's seat) to the front fully. (c) Turn over the cutout section of the carpet under the front seat (driver's seat). Take out the plug hole cover. (d) Check the reset lever (yellow one) for the operating state, Peep through the plug hole and check to see if the embossed letter “OFF” can be seen on the reset lever. Ifthe "OFF" is seen, it means the inertia sensor is functioning. In other words, the power supply circuit is in a cut state. To restore the power supply circuit, push up the reset lever and keep It in that state for at least one second WARNING: ‘If there is any possibilty of fuel leakage, never operate the reset lever. D. Inspection of ignition system 1. Spark check (7) Connect the spark plug and harness to the ignition coil. Ground the plug to the cylinder head cover. (2) Check to see if the spark is emitted at each spark plug while cranking the engine. WARNING: ‘Since there is the possibility that you may have strong shock during the spark check, never allow. your body to contact the vehicle body. 2. After the engine has warmed up, shown in the right figure. NOTE: ‘+ Use a timing light which is capable of detecting the pri- mary voltage. stall a timing light, as KS) Reset iever ©) (yellow) ON side Wen not operating: When operating: OFF sideRevised on ’98 Oct. 3. Confirm that the timing mark of the crankshatt pulley is lo- cated within the width of the Indicator of the timing belt cover. Specified Value: 5° +2° BTDC/ idle mpm NOTE: * Connect the test terminal and the earth terminal with a jump wire of the diagnosis connector. 4, Remove the ignition coils and the spark plugs. 5. Visually inspect the spark plug for electrode wear, thread or insulator damage. 6. Measure the electrode gap, using a plug gap gauge. Specified Value: 1.0-1.1 mm NOTE: * If the gap fails to conform to the specification, replace the plug. E. Inspection of compression pressure 1. Warm up the engine. 2. With the IG switch turned OFF, remove all of the IG coils and spark plugs. 3. Temporarily remove the main relay and fuel pump relay. 4, Insert a compression gauge into the spark plug hole. 5. Depress the accelerator pedal fully. 6. While cranking the engine, measure the compression pressure. Minimum Value: 1579 - 1755 kPa (400 rpm. Difference between cylin- ders is less than 147 kPa.) NOTE: * Be sure to use a fully-charged battery. Also, the mea- surement should be performed in the shortest possible length of time. F. Inspection of fuel flow 1. Loosen the hose band at the fuel pipe. Then remove the fuel hose from the fuel pipe. 2. Connect a suitable fuel hose (about 2 meter long) to the fuel pipe. 3. Insert one end of the fuel hose in a measuring cylinder. CAUTION: «The fuel pressure of the fuel line is approximately 294 kPa. Hence, be sure to gradually remove the pipe so as to prevent fuel from splashing. ‘* Since the fuel will flow out, be certain to place a suit- able container or cloth under the fuel pipe so that no fuel may get to the resin or rubber parts of the vehicle. ignition ting, L SS indicator fer checking exerts oo aEF-13 15. Turn OFF the ignition switch. 16. Install the injector grommet and O-ring to the injectors. NOTE: Install a new O-ring to the O-ring seal section. 417. Install the injectors and the fuel delivery pipe. NOTE: ‘* After completion of the assembling, ensure that the in- jector can be tured smoothly by your hand, although there is a slight resistance due to friction. ‘+ Make sure that the connector of the injector is located at the outside of the engine and is directed in a hori- zontal direction. 1. Inspection of idling revolution 1. Warm up the engine completely. NOTE: ‘+ Tum off the all electrical accessory switches. * The transmission control lever should be in the N or P range. 2. Connect a tachometer to the tachometer terminal and the. earth terminal at the diagnosis connector. 3. Check to see if the idling revolution conforms to the speci- fication when the engine water temperature is higher than 80°C. ‘Specified Value: L701 series All destinations: (M100 series EC, General__| AUS, ISRAEL, GCC i 850250 rpm ‘900 + 50 rpm AT (850 50 rpm (90050 rpm NOTE: + The engine revolution is given here for your reference during the check. It is not necessary to carry out the adjustment. J. Inspection of rotary ISC valve. 1. Connect a tachometer to the terminal of the diagnosis connector. 2. Check to see is the fast idle revolution speed is within the reference value. Reference Value: Around 1300 - 1800 rpmv25°C. NOTE: + The fast idle revolution speed can not be adjusted to the specification. If the revolution speed will not con- form to the reference value, perform the inspection of the auxiliary air system, following the procedure given below.Revised on 98 Oct. 2. PRECAUTIONS 1. When resistance or voltage measurement is conducted at the connector section, insert a measuring probe from the back of the connector, being very careful not to damage the harness of terminal connections. In the case of water-proof type connector, @ measurement is conducted at the connector section with the measuring probe put into contact with the terminal at the connection side of the connector. Be very careful not to apply exces- sive force to the terminal at the connector side. ‘As.an alternative method, insert a male or female terminal into the connector terminal or connect an adequate at- tachment. 2. The fuel line at the high-pressure side is pressurized to'a fuel pressure of about 250 kPa. Therefore, a large amount cof gasoline flows out when parts of the fuel line are discon- nected. Hence, take the following countermeasures. WARNING * Be sure to release the inner pressure of the fuel tank by removing the fuel filer cap in advance. 3. Tachometer connection Connect the tachometer probe to the measuring terminal of the diagnosis connecter. CAUTION: * This does not apply if your tachometer is a pick-up. ‘type. ‘+ Never allow the tachometer probe to touch the ground, for it could result in damage to the ignitor andlor igni- tion coll. + Some kinds of tachometers may not be suited for the ignition system of the vehicle. Therefore, ensure that your tachometer is compatible with the ignition system ‘of the vehicle. 4, Precautions during oxygen sensor handling (1) Do not drop the oxygen sensor or hit it to other ob- jects. (2) Do not immerse the sensor in water or do not cool it by water. 5. Donot open the cover of the ECU proper. (Failure to observe this caution could cause ECU malfunc- tion.)Revised on ’98 Oct. 3. WIRING DIAGRAM 3.1 SPECIFICATIONS OF SYSTEM FOR UNLEADED GASOLINE wa | PH RE d a ie af] “=a (l. = ea iA | me FA tl ot ot 2% ee00- enol | 3 adi Bie te ile Ly y in ieee Betty El oe yo ae a Baby] 2 i i as wie) oae Tevet | || nant al S (9188 001 Wi 105 Aju0) esEF-19 3.2 SPECIFICATIONS OF SYSTEM FOR LEADED GASOLINE Revised on ‘98 Oct. aa ! ft i |: s3. = =| ‘ae ct ba i aon $s 1 i 98 i s i i =e amen i roses High | ts elil Al i diame a an UR AO OEE | | iS 2] Apog euiGuz aan Lee em eRe iz x ah S| Sha a wm | ep { 4 IF q ne Lees 105u88 e194EF-23 5.3 DIAGNOSIS CODE NO. 13. CAM ANGLE SENSOR & CIRCUIT EFIECU I) (we 15 36 ww 60, " When no Ne signal is inputted even once while cranking is continued for several seconds with the accelerator pedal in a non-depressed state: However, please remember that this code is outputted on the assumption that the pressure sensor and idle switch systems are functioning properly. If the codes related to these systems are outputted simultaneously, perform checks for these codes first. 1 Check of cam angle sensor (1) Disconnect the connector of the cam angle sensor. (2) Check that there is the specified resistance between the respective terminals of the cam angle sensor. Specified Value: 950 - 1250.9 at 20°C NOTE: + If the resistance will not conform to the specification, replace the cam angle sensor. Refer to the IG section.Revised on ’98 Oct. (3) Temporarily remove the EFI main relay at the relay box. (4) Check that there is a voltage between the terminals of the cam angle sensor when the engine is being cranked. Specified Value: 3-6 V (AC) NOTE: + The generating voltage should be measured, using the AC range of a volt meter. * Ifthe measured value does not conform to the specifi cation, adjust the gap. See the IG section. REFERENCE (1) Prepare an oscilloscope. (2) Connect a probe to the respective terminals. (8) Check to see if a signal shown in the graph appears at the terminals when the engine is being cranked. NOTE: Hf not, check the air gap of the signal generator. Refer to the IG section of the service manual. 2. Check the wire harness and ground earth. (1) Check to see if the earth bolt exhibits looseness or corrosion. (2) Connect the wire harness connector to the connector ‘of the cam angle sensor. (3) Connect the SST between the ECU connectors: and the wire harness connectors. NOTE: ‘+ Refer to page EF-21, ‘Preparation of trouble shooting with SST" ‘+ Atthis time, disengage the connector between the SST and the EF] ECU. SST: 09842-97201-000 (4) Measure the resistance between the SST terminals 36 and 60. Specified Value: 950 - 1250.9 at 20°C NOTE: ‘+ Ifthe trouble has not been solved by repairing the wire hamess or parts, then, proceed to page EF-~47, Replacement of ECU. ‘Cam angle sensor output The roton ange senso signal wil be output zs shown, ‘inthe gure above when an osciloscopeis used. (The requency and woage ctl, depending upon the rotation speed)EF-28 (6) While keeping the engine revolution speed at 3000 rpm, count how many times the pointer of the voltmeter swings within 10 seconds. 8 times or more: Normal 0-7 times: Proceed to the following step. NOTE: ‘© There are cases where the measurement can not be conducted with a tester having a low reaction speed. (6) Measure the voltage between the VF terminal and the earth terminal while keeping the engine idle revolution when the jump wire is disconnected. Specified Value: 2.5+0.7V REFERENCE (1) Prepare an oscilloscope. (2) Connect a jump wire to the test terminal and the earth terminal. (3) Connect @ probe to the VF terminal and the earth ter- minal. (4) Check to see if a signal shown in the graph appears at ‘the terminals while the engine is rotating at 3000 rpm. NOTE: * There are cases where the measurement can not be conducted with a tester having a low reaction speed. Therefore, use a tester having a high reaction speed or oscilloscope. * Ifo voltage appears, check the oxygen sensor unit. ‘2. Check of oxygen sensor (1) Warm up the engine completely. (2) Disconnect the connector of the oxygen sensor. (3) Connect a voltmeter to the connector terminal of the ‘oxygen sensor. (4) Hold the engine revolution speed for 2 minutes at about 3000 rpm. At this time, ensure that the reading of the voltmeter registers 0.45 V or more. NOTE: » When the oxygen sensor connector has been discon- nected, an air-to-fuel mixture ratio of the engine will be- come rich. The oxygen sensor therefore generates an electromotive force of about 0.45 volts or more. + Replace the oxygen sensor with a new part, if the read ing will not register 0.45 V or more. + Ifthe reading conforms to the sj the following procedure. fication, proceed toRevised on '98 Oct. EF-30 5.6 DIAGNOSIS CODE NO. 24 VARIABLE RESISTER SENSOR & CIRCUIT eFIECU (VCO) (Ox) (E20) (vo) (PIM) 50 3951 13 Wire harness cide ANE near throtile When the signal from the variable resistor sensor is 4.8 V ‘or more or less than 0.2 V continuously for more than a certain length of time: 1. Check to see if the connector is connected property. 2. Tum off the ignition switch. 3. Check wire harness. (1) Connect the SST between the ECU connectors and the wire harness connectors. (2) Ensure that the voltage between the SST terminals 39 and 51 is within the specified value when the ignition switch is turned to the ON position Specified Value: 0.2 V or more, but less than 4.8 V NOTE: * Ifthe measured voltage does not conform to the speci- fications, check the wire harness. M100 series: L701 seriesEF-34 Revised on ’98 Oct. 5.8 DIAGNOSIS CODE NO. 41 LINEAR THROTTLE SENSOR & CIRCUIT (ve) (Pim) wm) (€2) 1338 41 14 ‘When the signal from the throttle sensor is 4.8 V or more or less than 0.2 V continuously for more than a certain length of time after starting: 1. Check to see if the connector is connected properly. 2. Disconnect the connector of the linear throttle sensor. Measure the resistance between the respective terminals. Terminal Condition ‘Standard value KO 99=XT1 25-60 X11 xTO_| Throttle valve fully closed O1-13 XT1—X70_| Throttle valve fully opened 17-42 3. Connect the SST between the ECU connectors and the wire harness connectors. 4. Ensure that the voltage between the SST terminals 41 and 14 is within the specified value when the ignition switch is tured ON. Terminal Condition Standard value 41-14 | Throttle valve fully opened 55V 41-14 | Throttle valve fully closed 04-08V odRevised on '98 Oct. 5.11 DIAGNOSIS CODE NO. 44 AIR CONDITIONER EVAPORATOR TEMPERATURE SENSOR & CIRCUIT zi M100 series tropical spec. only When the signal from the air conditioner evaporator tem perature sensor is 4.85 V or more or less than 0.098 V continuously for more than a certain length of time with the air conditioner switch tumed ON: 4. Check to see if the wire harness connectors are connect- ed property. 2. Turn off the ignition switch. 3. Check of wire harness (1) Connect the SST between the ECU connectors and the wire harness connectors, (2) Ensure that the voltage between the SST terminals 59 and 52 is within the specified value when the ignition switch is tured to the ON posi Specified Value: 0.1 -4.8V (Reference: 1.8 -2.9\V at 20°C) NOTE: + Ifthe measured voltage does not conform to the speci- fication, check the wire hamess. SaESTEF-45 Revised on '98 Oct. 5.14 DIAGNOSIS CODE NO. 81 IMMOBILIZER SIGNAL CIRCUIT EFIECU a) 15 {si0) 12 IMMOBILIZER ECU When the rolling codes cannot be exchanged between the engine EFI ECU and the immobilizer ECU or the rolling codes are not matched. 1. Check of wire harness (1) Remove the screws of the glove compartment sub= assembly. (2) Disconnect the connector of the Immobilizer ECU. (3) Connect the SST between the EFI ECU connectors and the wire harness connectors. (4) Check that continuity exists between the terminal QA3 (Cow! wire side terminal of the Immobilizer ECU) and terminal 12 (SST terminal). if not, check the wire harness. NOTE: * If the diagnosis code No. 81 is flashing, most likely it denotes that open wire occurs intermittently or the shielding is poor. * Ifthe trouble has not been solved by repairing the wire harness or connectors, then, proceed to the following steps. ® © immobilizer antenna coi! Immobilizer ECU EFIECU Ignition key TREE Immobilizer connector (Wire hamess side)Revised on ’98 Oct. EF-47 6. REPLACEMENT OF ECU 6.1 INSPECTION NOTE: + Even when the replacement of the ECU is required in the previous check, make sure that the ECU ‘malfunction has not been caused by factors other than the ECU by carrying out the following checks. ‘Then, proceed to replace the ECU. [Except for vehioles equipped with an immobilizer system} + The measurement of voltage should be conducted with all of the connectors connected. CAUTION: + Incases where the ECU is replaced with a new ECU, be sure to use the master key and connect the test terminal with the earth terminal, to start the engine for the first time. The engine will not start with a key other than the master key. + In'cases where the ECU is replaced with an ECU other than a new one, the engine will not start even. ifthe master key is used. For details, refer to the immobilizer manual. 1. Install the SST. See page EF-57, “Preparation of trouble shooting with ss" SST: 09842-97201-000 2. Measurement of voltage or resistance (1) Measure the voltage or resisiance between respective terminals. (2) Check to 88e if the measured voltage or resistance conform to the specifications in accordance with the following “CHARACTERISTICS OF ECU OUTPUT” table.EF-48 6.2 CHARACTERISTICS OF ECU OUTPUT ‘The following are standard voltages or resistances at ECU. Standarc ‘engine fully warmed up, Item Terminal ‘Condition voltage or resistance areas 8-15 Alltimes: Battery voltage sonar vaenoe Power supply 70-16 . CChack main relay in the o-15 | tgnton wich etumadon. [satay votage Gas 6 arth o wi Earth group 4 Aime: + @orless Check ear of wring i 73-14 | ignition switch is umedon. [45-55 (Check ECU power supply. Pressure ignition sven is tumed en bhot 38-14 Aimmeptide presente i101 33-40V Check pressure sensor. a ‘Wren gnilonswich stud on aren we (Cooing water temperatures | “02-4aV eck cooling water aa e2-14 | 20-90% ater engine has uly | (04-085) temperature sensor ‘warmed op) intake ai tom igniton evitch ie wmed on 02-48 i ‘sensor eo~ 14 (Air temperature is 20°C) (18-29) | Ghack air temp. sensor. ile engine speeds 5875 | votago vanes within Onyoensensor| 39-15 | kaptat 3000 rpm with engine Ly (Check oxygen sensor ee arange of0.2-10V Variate 30-51 | loniion swich is umedon ‘| 45-55V (Check ECU power supply fesigies 39-51 Ignition switch is tumed on. 02-48V Check variable resister sensor. Cam angio . While the engine being a mack cam angie sensor ape 26-00 | Whletheengneisbeing | 3-eV(ACrange) __| Check cam an Igniten wich sweden. log -gay Lneariivotie | gy qq | Tova valve fs fly closed : ar beam C1 _—— Ignition switch is tumad on. 45-55. ganenr, Throttle valve is fully opened. Tgniton ewich is tuned on. | chances ven Vehicle speed When vehicle is moved. we in voltage’ ao-14 Between 0.1Vriess | Check speed sencor ‘sensor (Measured votage changes 4 times for movement of 1.6 m) aoc poe BY eS ignion ool Wii the engine is being ; z : ; eave $14 | crancaotytne stanermenr, —|°-1-08V(ACrange) | Check onion col aa Injector drive 33-18 Ignition switch is tumed on. ‘Approx. battery voltage | Check injector(s). Voltage i 1 V orlss for = a two second after igntion | Check fuel pump relay ra mee Ignition switch is tamed on ‘switch has been tured. | The terminal 6 is for oie ‘on. Then, voltage immobilizer system. becomes battery voltage. Wie engine speed i bang VF monitor 5414 | keptatine ing revauton win | 18-32V Check oxygen sensor.EF-51 Revised on ’91 7. INSPECTION OF ROTARY ISC SYSTEM 7.1 WIRING DIAGRAM ic (FFAN) 28> To racitor fun relay (PSN 65pm To PIS oil pressure SW (acm) 34 > To A/c Sw (B.m9 §S¢-——> To heater biower SW 8)» to detoager Sv } $<» Total lamp SW F/L60A TERETE @ ISC SYSTEM BASIC INSPECTION Ensure that the engine revolution speed is high during the cold period, Also, ensure that the engine revolution speed ‘drops as the engine warms up and that the idle speed is maintained. ‘Specified Value: ‘850 rpm (A/T & M/T)... EC, General spec. for M100 series & All destination for L701 series. 900 rpm (A/T & MIT)... AUS, ISRAEL and GCC spec. for M100 series. 2. After the engine has warmed up completely, disconnect the connector of the ISC valve. At this time, ensure that the idle speed rises. (This confirmation should be conducted with no load, such as air conditioner and electric load, ap- plied.) Specified Value: idle + 1600 rom NOTE: * The above inspection should be conducted only when the engine coolant temperature is above 80°C. oanEF-52 8. Turn OFF the ignition switch. 4, Connect the SST between the EFI ECU terminals and the wire harness terminals. 5. Start the engine. 6. Measure the voltage between the SST terminals 45 and 416. NOTE: + Ensure that the measured voltage is stabilized at a ce- tain level according to the warming-up state. 7.3 ISC IDLE-UP SYSTEM INSPECTION 1. Warm up the engine completely. 2. Turn OFF the Ignition switch. 3. Connect the SST between the EFi ECU terminals and the wire harness terminals. Start the engine. Measure the voltage between the SST terminals 34, 55 and 18 and measure the idling speed when the A/C switch is in the following condition while the heater blower is os RO Ieling condition (Electrical oad “OFF") (Electrical load ON") ieee When an osclloscape is used, he ISC contol signal becomes the waveform as indicated in the figure above. (The duty rato cannat be spectied) being turned on. EC, General spec. for M100 series & All destinations for L701 series. Volage V Revolution speed rpm AC switch | OFF ON or | ON MT | O5orless | Bateyvaiage | 650 | 950 AT t t 50 | 900 MAUS, ISRAEL, GCC spec. for M100 series. Voltage V Revolution speed rpm Ac swich | OFF ON OFF ON MiT__| 05 orless | Batieryvoitae | 900 950 AT ct iw 900 900 6, Measure the voltage between the SST terminals 56 and 18 when the neutral start switch is in the following condition. Specified Value: PorNrange 0.5 Vorless ‘Other than P and N ranges Battery voltage NOTE: ‘* Make sure that the idle speed will not change when the shift lever is shifted to a position other than the P and N ranges. pissensos aeon '98 Oct EF-54 8. INSPECTION OF FUEL SYSTEM 8.1 WIRING DIAGRAM 8.2 INSPECTION OF FUEL PUMP OPERATION 4. Check to see if the wire harness connectors are connect- ed properly. 2. Check that you can hear fuel pump operating sound for 8 seconds when the ignition switch is turned on while con- necting the terminals with a jump wire as indicated in the illustration. 3. If not, check the wire harness. (1) Turn off the ignition switch (2) Connect the SST between the ECU connectors and the wire harness connectors. (3) Check that the voltage between the SST terminals 6.27 and 18 is within the following specified value when the ignition switch is turned to ON position.EF-56 INSTALLATION 4. Install a new fuel pump assembly to the fuel tank with a new gasket. 2. Tighten the attaching screws. Tightening Torque: 2.5 - §.0 Nm 3. Install the fuel tank and its related parts to the body. Refer to the 80 section of the service manual. NOTE: Perform the installation, while aligning the hole of he ‘bracket with the protruding section of the pump and the aS bracket with the mating mark on the fuel tank. 9. TROUBLE SHOOTING ACCORDING TO MALFUNCTION PHENOMENA 9.1 Description This section describes the checking procedure for cases where no abnormality code of diagnosis is indi- cated, but the vehicle is encountered with a malfunction. In the trouble shooting according to malfunction phenomena, first arrange in order the contents of diagno- sis through inquiries, basic checks and ECU circuit checks. Next, narrow down possible causes, referring to the table showing possible causes according to malfunction phenomena. Then, determine the priority of checks. At this time, perform the trouble shooting progressively according to the systems and parts, referring to the table below. CAUTION: ‘+ When checking each component, be sure to also check the hamesses and connectors connected to the component.