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6E–50 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS Engine Cranks But Will Not Run (Cont'd) Step No Yes Value(s) Action 10 Refer to Engine Mechanical Diagnosis to diagnose the following conditions: D Faulty camshaft drive belts D Leaking or sticky valves or rings D Excessive valve deposits D Weak valve springs D Incorrect valve timing D Leaking head gasket Is the action complete? — Verify repair Go to Step 11 11 Observe the “Engine Speed” data display on the Tech 2 Is the engine RPM indicated? (If the Tech 2 is normally — Go to Step 12 Go to Step 17 12 1. At the ECM (female) side of the connector mentioned in step, connect a test light between the 2. Ignition “ON.” injector driver circuit by oscilloscope. Did the test light stay on when checking any of the 4 — Go to Step 13 Go to Step 15 13 1. Ignition “OFF,” disconnect the ECM. Is the test light “ON?” — Go to Step 14 Go to Step 16 14 Locate and repair the short to ground in the injector Is the action complete? — Verify repair — 15 Check for an open injector driver circuit. Was a problem found? — Verify repair Go to Step 16 16 Replace the ECM (Refer to the Data Programming in Is the action complete? — Verify repair — 17 1. Raise the vehicle and disconnect the CKP sensor harness. 2. Ignition “ON.” ignition feed terminal. Did the light illuminate? — Go to Step 19 Go to Step 18 18 Check the ignition feed wire between the sensor and Is the action complete? — Verify repair — |