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6E–324 4JH1 ENGINE DRIVEABILITY AND EMISSIONS 8 1. Using the Tech 2, display the ECT sensor and IAT sensor value. 2. Check the displayed value. Does the Tech 2 indicate correct temperature — Verify repair Go to Step 9 9 1. Using the Tech 2, ignition “On” and engine “Run”. 2. Monitor the “Mass Air Flow” in the data display. Does the Tech 2 indicate correct “Mass Air Flow” — Go to Step 14 Go to Step 10 10 Remove the MAF & IAT sensor assembly and check • Objects blocking at the MAF sensor element. — Verify repair Go to Step 11 11 Check the MAF sensor harness for the following • Check for poor connector connection. • Check for misrouted harness. • Check for any accessory parts which may cause electric interference. If a problem is found, repair as necessary. — Verify repair Go to Step 12 12 Substitute a known good MAF & IAT sensor assembly — Go to Step 13 Go to Step 31 13 Replace the MAF & IAT sensor assembly. — Verify repair — 14 1. Using the Tech 2, ignition “On” and engine “Off”. 2. Monitor the “Pedal/Throttle Position” and “Idle Switch” in the data display. Does the Tech 2 indicate correct “Pedal/Throttle — Go to Step 19 Go to Step 15 15 1. Using the Tech 2, ignition “On” and engine “Off”. 2. Monitor the “Pedal/Throttle Position” and “Idle Switch” in the data display. 3. Adjust the accelerator cable or TPS within 0% to 100%. Was the problem solved? — Verify repair Go to Step 16 16 Check the TPS harness for the following conditions. • Check for poor connector connection. • Check for misrouted harness. • Check for any accessory parts which may cause electric interference. If a problem is found, repair as necessary. — Verify repair Go to Step 17 17 Substitute a known good TPS and recheck. — Go to Step 18 Go to Step 31 18 Replace the TPS. — Verify repair — Step Action Value(s) Yes No |