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6E-158 Engine Control System (4HK1) 5 1. Turn OFF the ignition. 2. Disconnect the boost pressure sensor 3. Turn ON the ignition, with the engine OFF. 4. Observe the Boost Pressure Sensor Is the Boost Pressure Sensor parameter less than 0.1 volts Go to Step 6 Go to Step 7 6 1. Turn OFF the ignition. 2. Connect a test lamp between the low 3. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate? — Go to Step 9 Go to Step 8 7 Important: 1. Test the signal circuit between the engine • A short to battery or ignition voltage 2. Repair the circuit(s) as necessary. Did you find and correct the condition? — Go to Step 13 Go to Step 12 8 1. Test the low reference circuit between the 2. Repair the circuit(s) as necessary. Did you find and correct the condition? — Go to Step 13 Go to Step 10 9 1. Turn OFF the ignition. 2. Inspect for an intermittent and for a poor 3. Repair the connection(s) as necessary. Did you find and correct the condition? — Go to Step 13 Go to Step 11 10 1. Turn OFF the ignition. 2. Disconnect the ECM harness connector. 3. Inspect for an intermittent and for a poor 4. Repair the connection(s) as necessary. Did you find and correct the condition? — Go to Step 13 Go to Step 12 11 Replace the boost pressure sensor. Refer to Boost Did you complete the replacement? — Go to Step 13 — Step Action Value(s) Yes No |