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F TROUBLESHOOTING GUIDE DESCRIPTION I Blower fan operates but cool air not expelled ITROUBLESHOOTING HINTS] Open or short circuit in wiring harness NC relay malfunction 34 Air conditioning sensor malfunction Magnetic clutch malfunction PCME malfunction AIC DOES NOT WORK INSPECTION ;round terminal B at NC relay with jumper wire Yes tnd check if condenser fan operates when ignition ;witch is turned ON #C RELAY I ;round terminal B at PCME 1 J terminal with jump- Yes ,r wire and check if condenser fan operates when gnition switch is turned ON - No :heck if Air conditioning sensor is OK Yes Section U ACTION 30 to next step 30 to A/C system Troubleshooting Section U 30 to next step qepair wire between PCME and A/C relay page F-7 Try known good PCME page F-144 ;heck Air conditioning sensor and wiring Section U Gartner Banana
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ON-BOARD DIAGNOSIS SYSTEM PREPARATION SST 1 SELECT SW A STEM SELECT 1 * SYSTEM SEUC . TEST SW - SYSTEM SELECT i # SELF TEST DIAGNOSTIC TROUBLE CODE NUMBER Inspection procedure 1. Connect the SSTs to the data link connector and a ground. 2. Set the select switch to position A. 49 B019 9AO System Selector 3. Set the System Selector to position 1 and SELF TEST as shown. For diagnosis 4. Turn the ignition switch ON. 5. Verify that 88 flashes on the digital display and that the buzzer sounds for 3 sec. after turning the ignition switch ON. 6. If 88 does not flash, check the main relay (Refer to page F-156.), power supply circuit, and check connector wir- mg. 7. If 88 flashes and the buzzer continues for more than 20 sec., check for a short circuit between the powertrain control module (engine) terminal 1 E and the data link connector. Replace the powertrain control module (en- gine) if necessary and perform Steps 3 and 4 again. 8. Note any code numbers and check for the causes by re- ferring to the check sequences shown on pages F-83 to F-93. Repair as necessary. 9. After repairs, cancel the code numbers by performing the "After-repair procedure". (Refer to page F-94.) Gartner Banana
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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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INTAKE AIR SYSTEM INTAKE AIR SYSTEM COMPONENTS Removal 1 Inspection l Installation Warning Fuel vapor is hazardous. It can very easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel in the fuel system is under high pressure when the engine is not running. 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 follow- ing "Fuel Line Safety Procedures". Fuel Line Safety Procedures A. Release the fuel pressure before disconnecting a fuel line. 1. Start the engine. 2. Remove the fuel pump relay. 3. After the engine stalls, turn the ignition switch to OFF. 4. lnstall the fuel pump relay. B. Avoid leakage. 1. When disconnecting a fuel line hose, wrap a rag around it to protect against fuel leakage. 2. Plug the hose after removal. C. lnstall hose clamps to secure the fuel pressure gauge connections. 1. Drain the engine coolant. (Refer to section E.) 2. Remove in the order shown in the figure. 3. Check the components for damage and repair or replace as necessary. 4. lnstall in the reverse order of removal, using new gaskets. 5. Refill the engine coolant. (Refer to section E.) Gartner Banana