jalalski
Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re:
The 4WD Relay in your T30 (which seems a Series II) is located under the driver's side glovebox I believe.
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10/Dec/2013, 5:34 am
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jalalski
Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re:
Yes. You can either test the 4WD Relay itself or the signal it sends to the coupling like Kev mentioned. In either cases you should get a signal at the 4WD solenoid.
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10/Dec/2013, 6:16 am
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Revhead Kev
Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 6360
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Re: 4WD not engaging
Chris,
You can only measure current if your meter is in-line with the curcuit.
Also be VERY CAREFULL measuring the voltage from the ABS/4WD controller as using the wrong earth point can blow the output of the controller and then you will have to replace it.
So start simple and cross everything else off the list first...
- measure the resistance of the 4WD solenoid at the electronic coupling.
- measure the continuity of the wiring to the 4WD solenoid, both the signal wire from the 4WD relay and the earth.
- exchange the 4WD relay with a known good replacement...the electronics will pick up that the coil has failed but will NOT detect if the contacts do not switch.
- measure the wiring continuity from the ABS/4WD controller to the 4WD relay...UNPLUG the controller harness after the battery is disconnected to measure the wiring continuity to inhibit the chance of any damage to the controller.
- measure the voltage to the 4WD solenoid at the connector...absolutely the last thing to do BUT for this you should have the Xtrail with all 4 wheels off the ground and someone you trust very much to have their foot lightly on the accelerator with other foot firmly on the brake and in 1st gear with LOCK mode selected as voltage is only sent to the solenoid when the accelerator is pressed.
--- Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
My Blog
My CarPC Worklog |
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10/Dec/2013, 8:54 am
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jalalski
Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re: 4WD not engaging
Here you go:
As I said, you have to remove the front storage box to be able to see/get to the 4WD Relay (control unit).
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10/Dec/2013, 4:23 pm
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jalalski
Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re:
Mate, I don't think you have any problems as the lock is engaging correctly and signals correctly on the dash. Do one more test and flick the dial to AUTO and do the wheel spin test on gravel road and see if the rear tyres engage, as the transfer of power to the rear happens in AUTO mode as well when front wheel spin is detected.
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11/Dec/2013, 6:05 am
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Revhead Kev
Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 6360
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Re: 4WD not engaging
Chris,
Why are you so determined to try and measure the AMPS ? You can't measure the current from an open plug as the circuit detects no resistance and shuts down with the 4WD fault indication you saw.
Measure the OHMS OF THE SOLENOID itself. It could be a high resistance and although the circuit is detecting it is there it might not be producing enough current to transfer the full torque.
Then we can compare your measured value with the correct value to tell you if it is OK.
Last edited by Revhead Kev, 11/Dec/2013, 6:33 am
--- Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
My Blog
My CarPC Worklog |
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11/Dec/2013, 6:32 am
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