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05–119 DIAGNOSTICS DTC P0443 – EFI SYSTEM (2TR–FE) 05KO8–05 EVAPORATIVE EMISSION CONTROL SYSTEM PURGE CONTROL VALVE CIRCUIT CIRCUIT DESCRIPTION In order to reduce hydrocarbon (HC) emissions, evaporated fuel from the fuel tank is routed through the charcoal canister to the intake manifold for combustion in the cylinders. The ECM changes the duty signal to the EVAP VSV so that the intake of HC emissions is appropriate for the driving conditions (engine load, engine speed, vehicle speed, etc.) after the engine is warmed up. DTC No. DTC Detection Condition Trouble Area S Open or short in EVAP VSV circuit S EVAP VSV S ECM Proper response to ECM command does not occur (1 trip detection logic) P0443 WIRING DIAGRAM W–G L 2 2 2 2 ECM 8 E10 MREL W–G 2 5 1 3 2 Engine Room EFI Relay R/B EFI 1 C17 IC4 2 2 B B J22 10 IM4 (LHD) W–B J/C C4 IC4 (RHD) B B FL MAIN C C 12 IL3 J10 J/C B V10 VSV B A A 1 P 2 23 E12 PRG B J2 J/C B W–B Battery EB A86056 INSPECTION PROCEDURE HINT: Read freeze frame data using the intelligent tester II. Freeze frame data record the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air–fuel ratio was lean or rich, and other data from the time the malfunction occurred. 05–120 DIAGNOSTICS 1 – EFI SYSTEM (2TR–FE) PERFORM ACTIVE TEST USING INTELLIGENT TESTER II(EVAP VSV) (a) (b) (c) (d) F F E Disconnect the vacuum hose of the EVAP VSV. Connect the intelligent tester II to the DLC3. Start the engine and turn the intelligent tester II ON. Select the following menu items: Powertrain / Engine and ECT / Active Test / Activate the VSV for EVAP Control. Check if the disconnected port applies suction to your finger when operating the EVAP VSV using the intelligent tester II. Standard: (e) E Air VSV is ON VSV is OFF A80362 Tester Operation Specified Condition VSV is ON Applies suction to your finger VSV is OFF Applies no suction to your finger (f) Reconnect the vacuum hose. OK CHECK FOR INTERMITTENT PROBLEMS (See page 05–8) NG 2 INSPECT ECM(CHECK VOLTAGE) E11 E12 (a) (b) PRG E01 ECM Connector A18294 Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard: Tester Connection Specified Condition PRG (E12–23) – E01 (E11–7) 9 to 14 V OK REPLACE ECM (See page 10–12) NG 3 INSPECT VACUUM SWITCHING VALVE(OPERATION OF EVAP VSV) (See page 12–5) OK: Air flows when the battery voltage is applied to the EVAP VSV. NG OK REPLACE VACUUM SWITCHING VALVE 05–121 DIAGNOSTICS 4 – EFI SYSTEM (2TR–FE) CHECK HARNESS AND CONNECTOR(ECM – EVAP VSV) (a) (b) (c) E12 Disconnect the E12 ECM connector. Disconnect the V10 EVAP VSV connector. Measure the resistance according to the value(s) in the table below. Standard (Check for open): PRG ECM Connector Specified Condition EVAP VSV (V10–2) – PRG (E12–23) Below 1 Ω Standard (Check for short): A65745 (d) (e) Wire Harness Side: V10 EVAP VSV Connector Tester Connection Specified Condition EVAP VSV (V10–2) or PRG (E12–23) – Body ground 10 kΩ or higher Reconnect the ECM connector. Reconnect the EVAP VSV connector. NG A52933 A51984 Tester Connection REPAIR OR CONNECTOR REPLACE HARNESS OR OK 5 CHECK HARNESS AND CONNECTOR(EFI RELAY – EVAP VSV) (a) (b) (c) Engine Room R/B: EFI Relay Tester Connection Specified Condition EVAP VSV (V10–1) – EFI relay (3) Below 1 Ω Standard (Check for short): A66291 (d) (e) Wire Harness Side: V10 EVAP VSV Connector A51984 Remove the EFI relay from the engine room R/B. Disconnect the V10 EVAP VSV connector. Measure the resistance according to the value(s) in the table below. Standard (Check for open): Tester Connection Specified Condition EVAP VSV (V10–1) or EFI relay (3) – Body ground 10 kΩ or higher Reinstall the EFI relay. Reconnect the EVAP VSV connector. NG A52933 REPAIR OR CONNECTOR OK INSPECT ECM POWER SOURCE CIRCUIT (See page 05–168) REPLACE HARNESS OR