TSB : Diagnostic Test

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WARNING: This page is about a different variant/trim than selected. ESIM SWITCH STATE NOTE: If the customer is experiencing an early fuel shut off during the fuel filling process in addition to DTC P0440, P0441, or P0452, check for restrictions in the tubes/hoses between the Fuel tank and Evaporative Canister, ESIM, and the ESIM Vent Filter before continuing. NOTE: Diagnose and repair any purge system or purge solenoid circuit DTCs before continuing with this test procedure. Turn the ignition on. With a scan tool, read the ESIM Switch state. What is the state of the ESIM Switch? Open Go To 2 Closed Go To 3 EVAP SYSTEM INSPECTION Turn the ignition off. Perform a visual inspection of the entire Evaporative Emission System for any of the following conditions: Damaged or missing components Incorrect routing of hoses and tubes Damaged or pinched hoses and tubes Check the wiring harness routing for possible intermittent short to ground of the ESIM wiring Were any problems found? Yes Repair as necessary. Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . No Testing complete. The condition that caused the fault is intermittent and not present at this time. CHECK FOR A BLOCKAGE IN THE SYSTEM Remove the Fuel Cap or open the Capless Fuel Filler flap. With a scan tool, read the ESIM Switch state. Does the ESIM Switch state change from CLOSED to OPEN when the purge hose was disconnected? Yes Go To 4 No Go To 6 EVAP PURGE SOLENOID WARNING: Keep lit cigarettes, sparks, flames, and other ignition sources away from the test area to prevent the ignition of explosive gases. Keep the test area well ventilated. Failure to do so may result in possible serious or fatal injury. Disconnect both vacuum hoses at the Evap Purge Solenoid. NOTE: After disconnecting the Purge Solenoid vacuum connections, inspect the lines and solenoid for signs of contamination. Using a hand vacuum pump, apply 5 in. Hg. to the "ENGINE" side of the Purge Solenoid. NOTE: The Purge Solenoid should hold vacuum for a minimum of 15 seconds. Start the engine. With the scan tool, navigate to system test, and start the Purge Vapors System test. Select open to actuate the Purge Solenoid to the ON position. NOTE: The vacuum should drop when the solenoid is actuated. Does the solenoid function as described above? Yes Go To 5 No Verify that there is good pin to terminal contact in the solenoid and PCM harness connectors. Replace the Purge Solenoid if no problems were found in the connectors. Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . EVAP PURGE HOSE/TUBE OBSTRUCTION Turn the ignition off. Remove and inspect the Purge hose between the Purge Solenoid and the Intake Manifold for proper routing, installation, damage, kinks or blockages. Inspect the vacuum port on the manifold for blockages. Were any problems found? Yes Repair or replace as necessary. Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . No Repair the pinched or blocked line between the Purge Solenoid and the Canister or between the Canister and the Fuel Tank. Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . ESIM SWITCH Disconnect the ESIM harness connector. Does the ESIM Switch state change from CLOSED to OPEN when the switch is disconnected? Yes Replace the ESIM in accordance with the Service Information. Refer to SWITCH, EVAPORATIVE EMISSIONS SYSTEM MONITOR, REMOVAL AND INSTALLATION . Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . No Go To 7 CHECK THE (K108) ESIM SIGNAL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the PCM C1 harness connector. Check for continuity between ground and the (K108) ESIM Signal circuit at the ESIM harness connector. Is there continuity between ground and the (K108) ESIM Signal circuit? Yes Repair the (K108) ESIM Signal circuit for a short to ground. Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . No Go To 8 CHECK FOR A SHORT BETWEEN THE (K108) ESIM SIGNAL CIRCUIT AND THE (Z906) ESIM GROUND CIRCUIT Check for continuity between the (K108) ESIM Signal circuit and the (Z906) ESIM Ground circuit at the ESIM Switch harness connector. Is there continuity between the (K108) ESIM Signal circuit and the (Z906) ESIM Ground circuit? Yes Repair the short between the (K108) ESIM Signal circuit and the (Z906) ESIM Ground circuit. Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . No Go To 9 CHECK RELATED PCM AND COMPONENT CONNECTIONS Perform any Service Bulletins that apply. Disconnect all PCM harness connectors. Disconnect all related in-line harness connections (if equipped). Disconnect the related component harness connectors. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions: Proper connector installation. Damaged connector locks. Corrosion. Other signs of water intrusion. Weather seal damage (if equipped). Bent terminals. Overheating due to a poor connection (terminal may be discolored due to excessive current draw). Terminals that have been pushed back into the connector cavity. Check for spread terminals and verify proper terminal tension. Repair any conditions that are found. Reconnect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged. With the scan tool, erase DTCs. Test drive or operate the vehicle in accordance with the when monitored and set conditions. With the scan tool, read DTCs. Did the DTC return? Yes Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL AND INSTALLATION . Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . No Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . Test complete.