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P0138 HO2S2 EC-159 < COMPONENT DIAGNOSIS > [QR25DE] C D E F G H I J K L M A EC N P O DTC Confirmation Procedure INFOID:0000000005273151 Perform PROCEDURE FOR MALFUNCTION A first. PROCEDURE FOR MALFUNCTION A With CONSULT-III 1. Start engine and warm it up to the normal operating temperature. 2. Turn ignition switch OFF and wait at least 10 seconds. 3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load. 4. Let engine idle for 2 minutes. 5. Check 1st trip DTC. 6. If 1st trip DTC is detected, go to With GST Follow the procedure “WITH CONSULT-III” above. PROCEDURE FOR MALFUNCTION B With CONSULT-III TESTING CONDITION: ° C (32 to 86 ° F). 1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III. 2. Start engine and warm it up to the normal operating temperature. 3. Turn ignition switch OFF and wait at least 10 seconds. 4. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load. 5. Let engine idle for 1 minute. 6. Make sure that “COOLAN TEMP/S” indicates more than 70 ° C (158 ° F). If not, warm up engine and go to next step when “COOLAN TEMP/S” indication reaches 70 ° C (158 ° F). 7. Open engine hood. 8. Select “HO2S2 (B1) P1146” of “HO2S2” in “DTC WORK SUPPORT” mode with CONSULT-III. 9. Start engine and following the instruction of CONSULT-III display. 10. Make sure that “OK” is displayed after touching “SELF-DIAG RESULTS”. If “NG” is displayed, refer to . If “CAN NOT BE DIAGNOSED” is displayed, perform the following. a. Turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle). b. Return to step 1. Overall Function Check INFOID:0000000005273152 Use this procedure to check the overall function of the heated oxygen sensor 2 circuit. During this check, a 1st PROCEDURE FOR MALFUNCTION B With GST 1. Start engine and warm it up to the normal operating temperature. 2. Turn ignition switch OFF and wait at least 10 seconds. 3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load. 4. Let engine idle for 1 minute. 5. Set voltmeter probes between ECM terminal 74 (HO2S2 signal) and ground. |