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Matt, Mechanical Engineer
Category: Car
Satisfied Customers: 21618
Experience:  BEng hons Mech engineering, in auto industry 22 years
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Navara D40 auto stays in fifth after starting, solenoid is

Resolved Question:

navara D40 auto stays in fifth after starting, solenoid is OK ecu keeps showing fault.. is ecu faulty.
Also, transmission fluid is grey in colour.
Any ideas folks?
Submitted: 1 year ago.
Category: Car
Expert:  Matt replied 1 year ago.
Hello the transmission will lock up in gear ( usually 3rd) when it detects a fault and to have grey fluid is also pretty undesirableI'd say 1st thing to do is to drain and replace the fluid with fresh and also consider dropping the sump pan off the unit so you can flush out the filter screen in the bottom of the unit and also inspect the wiring / connections to the solenoids at the same time
Customer: replied 1 year ago.
hi Matt, as far as I know , this has been done and new solenoid replaced, the ecu still showing a solenoid error. The transmission drives very smooth prior to this. Is the grey colour and indication of wear? The specialist I have taken it to also mentioned the torque converter ?
Customer: replied 1 year ago.
does the ecu need to be reset?
Expert:  Matt replied 1 year ago.
hello they grey deposits will be wear from the clutch packs and or bearings? if there's a still a solenoid error showing then its possible that the valve block downstream of the valve is blocked or the wiring to the solenoid is damagedits possible that the ECU may need resetting by disconnecting the battery cables and clamping them together for 10 mins. Remove both battery leads from the battery then use a nut and bolt or G-clamp to hold both battery lead terminals together. This discharges any capacitors / memory within the ECU and around the car so ensures all memory settings are wiped clear - back to the factory default. This will reset all the systems on the car and you may need the radio security code to get it going again, and ensure that the keys are in your hand when you re-connect the battery as the car may lock and turn on the alarm
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