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F ON-BOARD DIAGNOSIS SYSTEM CODE No. I 03 (SGT SIGNAL) iTEP I INSPECTION ACTION - Yes - No ' I Are there any poor connections in crankshaft posi- tion sensor circuit? Repair or replace connector I Go to next step I 1 Is Code No.04 present at same time? Yes - No Go to next ste~ I GO to Step 5 I Yes - No 3 Go to next step I Is there continuity between crankshaft position sen- sor terminal A and ground? Check for open circuit in wiring from crankshaft position sensor to ground Go to next step Check for open circuit in wiring from crankshaft position sensor to main relay 1 Is there battery positive voltage at crankshaft posi- tion sensor terminal B Yes - No Yes 5 6 Go to next step Is there continuity between crankshaft position sen- sor and PCME? Crankshaft position sensor I PCME C I 2 E Is there approx. 5V at PCME terminal 2E? (With crankshaft position sensor connector discon- nected) Check for open circuit in wiring from crankshaft position sensor to PCME Yes Go to next step I Replace PCME as page 6143 Replace crankshaft position sensor page F-153 Yes - No - 7 Check for short circuit in wiring from crankshaft position sensor to PCME 15UOFX-026 Is there approx. 5V at crankshaft position sensor terminal C? (At harness-side connector with con- nector disconnected) I CODE No. I 04 (SGC SIGNAL) I STEP I INSPECTION 1'1 Are there any poor connections in crankshaft posi- tion sensor circuit? Repair or replace connector Go to next step Go to next step 121 Is Code No.03 also present? Go to Step 5 Go to next step Is there continuity between crankshaft position sen- sor terminal A and ground? Check for open circuit in wiring from crankshaft position sensor to ground Go to next step Check for open circuit in wiring from crankshaft position sensor to main relay 4 Is there continuity between crankshaft position sen- sor and PCME? Go to next step Is there battery positive voltage at crankshaft posi- tion sensor terminal B? Yes - No No - Yes - No 6 Check for open circuit in wiring from crankshaft position sensor to PCME Go to next step Replace PCME page F-143 Crankshaft position sensor I PCME D Replace crankshaft position sensor page F-153 Check for short circuit in wiring from crankshaft position sensor to PCME 2G 7 Is there approx. 5V at PCME terminal 2G? (With crankshaft position sensor connector discon- nected) Is there approx. 5V at crankshaft position sensor terminal D? (At harness-side connector with con- nector disconnected) Yes No Gartner Banana
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ON-BOARD DIAGNOSIS SYSTEM F Circuit Diagram TO IGNITION SWITCH TO BATTERY MAIN RELAY :AF*, CRANKSHAFT POSITION SENSOR Gartner Banana
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ON-BOARD DIAGNOSIS SYSTEM CODE No. 25 (PRC SOLENOID VALVE) I Condition Ignition switch ON ACTION Repair connector and/or wiring harness Go to next step Go to next step STEP 1 2 Check for open or short circuit in wiring harness (PRC Battery positive solenoid valve terminal A - Main relay terminal D) voltaae 3 CODE No. 26 (PURGE SOLENOID VALVE) iTEP I INSPECTION I ACTION 4 ' I Are there any poor connections in purge solenoid valve circuit? INSPECTION I . - I Is continuity between PRC solenoid valve terminal B and PCME terminal 2R? I 2 Is resistance of purge solenoid valve OK? Does PRC solenoid valve circuit have a poor con- nection? Is connector terminal A voltage OK with PRC sole- noid valve connector disconnected? 36UOF2-039 Is PRC solenoid valve OK? as page F-123 Is there battery positive voltage at terminal A of purge solenoid valve circuit? Yes No Yes Yes Solenoid valve Check for short circuit in wiring harness (PRC solenoid valve terminal B - PCME terminal 2R) No Yes ' No 5 Is PCME terminal 2X voltage OK? page F-147 Q If OK, go to next step e If not OK, repair wiring harness Repair wiring harness Replace PCME page F-143 Replace PRC solenoid valve Yes Repair or replace connector No Go to next step Yes Go to next step No Replace purge solenoid valve page F-132 Yes Go to next step No Check for open circuit in wiring from purge solenoid valve I to main relay I No Check for open circuit in wiring from purge solenoid valve I to PcME I Yes I Replace PCME page F-143 No Check for short circuit in wiring from purge solenoid valve to PCME 15UOF2-035 Gartner Banana
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F ON-BOARD DIAGNOSIS SYSTEM CODE NO. I 28 (EGR SOLENOID VALVE(VACUUM)) I I iTEP I INSPECTION ACTION (vacuum) circuit? valve (vacuum) connector disconnected OK? - Yes Repair or replace connector I Go to next step Yes Go to next step No - Yes - No 3 Check for open or short circuit in wiring from EGR solenoid valve (vacuum) terminal A to main relay terminal I Condition 1 Voltage IG switch ON I Battery positive voltage Is continuity between EGR solenoid valve (vacu- um) terminal B and PCME terminal IT OK? Check for short circuit in wiring from EGR solenoid valve (vacuum) terminal B to PCME terminal IT 0 If OK, go to next step 0 If not OK, repair or replace wiring harness Repair or replace wire harness Yes - No 4 Replace PCME Replace EGR solenoid valve (vacuum) Is EGR solenoid valve (vacuum) OK? CODE No. I - 29 (EGR SOLENOID VALVE(VENT)) I iTEP I INSPECTION ACTION I I If there a poor connection in EGR solenoid valve (vent) circuit? Repair or replace connector Go to next step Go to next step 1 Is connector terminal A voltages with EGR solenoid valve (vent) connector disconnected OK? Check for open or short circuit in wiring from EGR solenoid valve (vent) terminal A to main relay terminal I Condition I Voltage G switch ON I Battery positive voltage 1 Yes 3 Check for short circuit in wiring from EGR solenoid valve (vent) terminal B to PCME terminal 1 R Is continuity between EGR solenoid valve (vent) terminal B and PCME terminal 1 R OK? 0 If OK, go to next step s If not OK, repair or replace wiring harness Re~air or reolace wire harness I 4 Replace PCME I Replace EGR solenoid valve (vent) 39UOFX-110 Is EGR solenoid valve (vent) OK? No Yes No Gartner Banana
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ON-BOARD DIAGNOSIS SYSTEM INSPECTION Are there any poor connections in idle air control valve circuit? CODE NO. Is resistance of idle air control valve OK? 34 (IDLE AIR CONTROL VALVE) 1 Resistance: 11.5 + 0.8R (20°C (68°F)) Is there battery positive voltage at terminal A of idle air control valve circuit? Is there continuity between idle air control valve and PCME? Idle air control valve I PCME B 2W Is PCME terminal 2W voltage OK? page F-147 Circuit Diagram No 1 Go to next ste~ I Yes ACTION Repair or replace connector Yes No Yes Go to next step I I Go to next step Replace idle air control valve page F-106 Yes No No Check for open circuit in wiring from idle air control valve I to PCME Go to next step Check for open circuit in wiring from idle air control valve to main relay SOLENOID VALVE pRc c Yes No PURGE SOLENOID VALVE Replace PCME page F-143 Check for short circuit in wiring from idle air control valve to PCME t PCME 15UOFX-036 TO IGNITION - rVF, SWITCH A - - EGR TO BATTERY - O?! SOLENOIC t 4 I, VALVE (VACUUM) SOLENOI VALVE (VENT) Gartner Banana
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ON-BOARD DIAGNOSIS SYSTEM SELECT SW A Af ter-repair Procedure 1. Cancel the memory of malfunctions by disconnecting the negative battery cable at least 20 seconds and de- press the brake pedal. Reconnect the negative battery cable. 2. Connect the SST to the data link connector as shown. 3. Turn the ignition switch ON, but do not start the engine for six seconds. 4. Start and warm up the engine, then run it at 2,000 rpm for three minutes. 5. Verify that no code numbers are displayed. Gartner Banana
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INTAKE AIR SYSTEM THROTTLE VALVE 45UOFX442 THROTTLE BODY Removal 1. Remove the negative battery terminal. 2. Remove the air pipe. 3. Remove the accelerator cable from the throttle lever. Note Before disconnecting the water hoses, drain the en- gine coolant. 4. Disconnect the water hoses. 5. Disconnect the connectors for the idle air control valve and the throttle position sensor. 6. Remove the throttle body. Inspection Do not remove the thin sealing coating from the throttle valve or bore. 1. Verify that the throttle valve is closed throttle position. 2. Verify that the throttle valve moves smoothly when the throttle lever is moved from closed throttle position to wide open throttle. 3. Replace the throttle body if necessary. Installation Install in the reverse order of removal, using a new mounting gasket. Tightening torque: 19-25 N.m (1.G2.6 kgf.m, 14--18 ftlbf) Gartner Banana
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FUEL SYSTEM SYSTEM OPERATION Fuel Pressure Hold Inspection Warning Fuel line spills and leaks are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete the "Fuel Line Safety Procedures" on page F-108. 1. Disconnect the negative battery terminal. 2. Install a fuel pressure gauge between the fuel pipe and the fuel main hose. (Install clamps as shown.) 3. Connect the negative battery terminal. 4. Connect data link connector terminals F/P and GND with a jumper wire. 5. Turn the ignition switch ON for 10 sec. to operate the fuel Pump. 6. Turn the ignition switch OFF and disconnect the jumper wire. 7. Observe the fuel pressure after 5 min. Fuel pressure: More than 147 kPa (1.5 kgf/cm2, 21 psi) 8. If not as specified, perform the following inspections. Fuel pump hold pressure (Refer to page F-114.) Pressure regulator hold pressure (Refer to page F-118.) Fuel injector fuel leakage (Refer to page F-120.) Gartner Banana
