Exhaust valve timing control learning procedure Infiniti G35
2008 EX35 3.5 2007 G35 3.5 2008 G35 3.5 2007 350Z 3.5 2008 350Z 3.5 Customer Concern: Malfunction Indicator Light (MIL) is on. Exhaust Valve Timing (EVT) control codes P0014, P0024.
Cleared the codes and they returned. Scan tool has the actuator test for the exhaust valve timing control but there is no engine change. Average Reported Mileage: 117513 Tests/Procedures:
1. Clear the codes.
2. Scope the pulsed voltage signals to the exhaust valve timing control magnet retarder at terminal 6 and terminal 7 of connector F101 of the Engine Control Module (ECM) or scope then at the magnet retarder and look for 0-12 volt square wave signals at 1500 -2000 RPM.
3. Can try to operate the exhaust valve timing control with the scan tool and look for the square wave signal as well.
4. Ohm the exhaust valve timing control magnet retarder on each bank – specification is 9.0-11.0 ohms at 68 degrees F.
5. Remove the exhaust valve timing control magnet retarder on each bank and check the plate behind them for wear. May see one single groove. See if there is uneven wear.
6. Inspect the rear end of the camshaft signal plate for debris.
7. Perform the exhaust valve timing control learning procedure using the following procedure: a. Start engine and warm it up to normal operating temperature. b. Set selector lever to N position (A/T) or neutral position (M/T) and confirm that following electrical or mechanical loads are not applied. – Headlamp switch is OFF – Air conditioner switch is OFF – Rear defogger switch is OFF – The steering wheel is in the straight-ahead position, etc. c. Keep the engine speed between 1,800 and 2,000 RPM at 20 seconds.
Tech Tips: Feedback from Infiniti is that the exhaust valve timing control magnet retarders are wearing and getting out of position changing the camshaft timing and setting the codes.
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