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2. EXHAUST LEAK Start the engine. Inspect the exhaust for leaks between the engine and the O2 Sensor. Turn the ignition off. If a leak is heard but unable to be located, it may be necessary to use special tool Miller Tool #8404A Evaporative Connect the SMOKE supply tip (black hose) to the exhaust cone adapter (if equipped) and place it into the tail pipe. Set the smoke/air control switch to SMOKE. Press the remote smoke/air start button. While still holding the remote smoke/air start button, use the white light (#8404-CLL) to follow the EVAP system If a leak is concealed from view, release the remote smoke/air start button, and use the ultraviolet (UV) black light The exiting smoke deposits a residual fluid that is either bright green or bright yellow in color when viewed with a Be sure to check the exhaust manifold to cylinder head connection for leaks. Are there any exhaust leaks? Yes >> Repair or replace the leaking exhaust parts as necessary. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Go To 3 3. (K243) O2 2/2 SIGNAL CIRCUIT HIGH RESISTANCE Turn the ignition off. Disconnect the C1 PCM harness connector. CAUTION: CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands Monitor the voltmeter. Is the voltage below 0.5 volts? Yes >> Go To 4 No >> Repair the high resistance in the (K243) O2 2/2 Signal circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 9 - 180 ENGINE ELECTRICAL DIAGNOSTICS LX |