Vanden Plas (X300) L6-4.0L (AJ16) (1996)
To adjust the potentiometers for squab recline or headrest motors, remove the rear trim panel from the squab to gain access.
10.
Verify adjustments and memory settings:
Set all seat movements to their lower limits:
Depress the Memory 1 Button. The LED should illuminate and a tone should be heard as Memory 1 sets.
Set all seat movements to their upper limits:
Depress the Memory 2 Button. The LED should illuminate and a tone should be heard as Memory 2 sets.
11.
Failure of a memory to set, or of the LED to illuminate, indicates that a potentiometer is incorrectly adjusted or is faulty.
D. ADJUSTMENT AFTER REPLACING COMPONENTS
Procedures for replacement of potentiometers are detailed in Sections E - G of this Bulletin.
1.
Before replacing a potentiometer or drive motor assembly, or disturbing the relationship of a motor/potentiometer/seat mechanism, run the
appropriate mechanism to the position listed on the previous page or assemble with the mechanism in the following position:
Cushion Front Adjustment Motor
Fully Raised
Cushion RearAdjustment Motor
Fully Raised
Fore/Aft Movement
Fully Rearwards
Squab Recline Movement
Fully Forwards
2.
Before engaging the replacement potentiometer with its drive mechanism, use a DVOM to measure the resistance between the feedback wire of the
potentiometer and the White wire.
3.
Rotate the hexagonal drive of the potentiometer to obtain the resistance value listed below. Engage the potentiometer with the drive mechanism as
close to this position as possible. Make any fine adjustments after the potentiometer has been secured to the drive, by turning the white adjuster
screw on the potentiometer.
Mechanism
Position
Color of
Resistance between
feedback
potentiometer
wire
feedbackwire
and white wire
Cushion Front
Fully Raised
White/Blue
141 - 188 ohms
Cushion Rear
Fully Raised
White/Orange
141 - 188 ohms
Fore/Aft Adjustment Fully Rearwards
White/Yellow
141 - 188 ohms
Squab Recline
Fully Forwards
White/Red
4512 - 4559 ohms
4.
Position the seat in the vehicle with motors and potentiometers in the positions as indicated above and connect the multiplug.
5.
The voltage readings listed on page 3 should then be obtained. If necessary, make fine adjustments using the white screw on the potentiometer.
6.
Confirm that all movements function correctly and that the memory set check (section C, step 10) is correct before finally reinstalling the seat.
E. REPLACING A CUSHION RAISE/LOWER POTENTIOMETER
Before disconnecting and removing the seat from the vehicle, run both front and rear cushion raise/lower mechanisms to the top limits of their travel.
1.
Remove the seat from the vehicle and remove the securing clips from the motor. Displace and remove the potentiometer retaining plate.
2.
Release the harness multiplug from the mounting bracket.
3.
Cut the tie-strap which secures the motor drive cable.
4.
Displace the anti-backout device on the multiplug.
5.
Identify the potentiometer terminals and release them from the multiplug using SpecialTool MS. 1540. Make a note of the relationship of wire
colors to multiplug terminal locations to assist in reassembly later.