Jaguar XJ40 Door Handle Repair, Door Won't Open
On the XJ40 a door that won't open is usually the rod between the outside handle and the latch set too short or too long, and a handle that has been fighting a badly set rod eventually snaps. I'd start by comparing handle travel with a good door, then take the door card off and look at the rod before buying anything. A stiff or broken latch comes next.
How bad is it · Safe to drive
Safe to drive; get in through another door
Nothing here affects how the car drives. A door that won't open from inside is a problem in an accident, so don't leave it that way longer than you have to.
Which one applies to yours depends on your symptoms, your model year and what has already been done to it.
Likely causes, most common first
Read the check cost before the odds: a free check that rules a cause out beats a likely guess that costs money.
The rod from handle to latch out of adjustment
The outside handle pulls the latch through a threaded rod held in a nylon adjuster block, and 1988-89 cars also have a hidden turnbuckle at the latch. Set too short, the latch stays locked; too long, the handle lifts without releasing it.
The outside handle has far less travel than on the other doors, or lifts freely and does nothing. Sometimes the plunger can't be pulled up and the key won't turn. On some cars the door jams only once the car has warmed up.
Compare the handle travel with a good door. With the door card off, make sure the rod is clipped in at both ends and see how far it is threaded into its block. The opposite door shows how it should sit.
Adjust the rod a turn at a time and test after each turn, closing the latch on a bar with the door open. On 1988-89 cars the turnbuckle takes 7 mm and 8 mm spanners and has only about two turns of useful range. If the door is already jammed locked, unclip the top of the link from its plastic retainer, lift the plunger and open it from inside. A small lock nut on the rod stops it creeping out of adjustment again. If it jams only when warm, backing the turnbuckle off slightly is worth trying.
A broken outside handle
The outside handles are pot metal. A handle that has been working against a badly set rod eventually snaps, so a car with several replaced handles is nothing unusual.
The handle lifts with no resistance or feels loose, and the door stays shut. Often more than one door on the same car has gone.
With the door card off, see whether the handle lever still moves the rod. If the rod and latch work when you push them by hand, the handle is the part to replace.
Fit a new handle and set the rod before closing up. Handles from later cars are about an inch longer and won't fit. New front sets may come with the lock micro-switch only, without the lock-heater parts. Move your old barrel into the new handle so one key still fits: it's held by a circlip, and the spring-loaded discs inside must go back in order. Leave the key in while the barrel is out and work on the bench over a sheet of paper. Jaguar service bulletin 76-64 covers Tibbe barrel repair.
The latch has snapped shut with the door open
The latch can be pushed into its closed position while the door stands open. It then can't close on the striker, and the handles seem to do nothing because the child lock or a lowered plunger blocks them.
The door is open but the claw in its edge is closed, so the door bounces off the striker. Neither handle, the child lock lever nor the console lock button frees it.
Look at the claw in the door edge and compare it with another door.
Set the child lock to off and lift the plunger, then pull either handle all the way to turn the latch back open. If it still won't let go, put a screwdriver or a round bar into the hole behind the claw and lever it inboard.
A stiff, worn or broken latch
The latch is a sealed, riveted box: either handle lifts a pin that frees a spring-loaded U-shaped catch from the striker. Old grease, grit or a broken plastic part inside stops it letting go. On late cars a small nylon piece in the latch tends to snap before the handle does.
The handle and rod move normally but the door stays shut, or the lock feels stiff and weak, often after a handle change.
Door card off, unhook the rods and work the latch lever by hand. Look for grit and wear around the linkage pins; driving with the window down lets dirt in.
Worth trying first: graphite or a dry lubricant on the latch and linkage, then work it by hand eight to ten times. If a part inside has broken, the nylon piece isn't sold on its own, so the whole latch assembly is changed.
A sticking switch behind the handle
Behind the outside handle sit micro-switches: one for the lock heater, worked by a small rocker when the flap is lifted, and on the driver's door the one that tells the system to lock. A switch stuck closed, or held by a badly set rod, runs its circuit on its own.
Lifting the driver's handle locks every door and shuts the windows. Or the handle is warm after the car has stood, the lock fuse blows and the battery runs down.
Raise the windows first; they won't work with the door card off. Test continuity through the heater switch with the flap down and up: it should break with the flap down. For the lock problem, look for a short to earth on the purple/black wire at the handle when it's pulled.
Worth trying: reset or replace the micro-switch at the handle, and set the rod so it no longer holds the switch.
The order to check them in
The point of the order is money: each step either rules a cause out or makes the next one worth doing. Green is free, amber costs a little, red is the one to arrive at last.
Compare it with a good door
Feel the outside handle travel on each door, then try the inside handle, the plunger and the child lock. One door that feels different points to its rod or its handle.
freeGet in if no handle works
Press hard on the door about halfway along the glass while lifting the handle. On the front handle, a long thin screwdriver pushed up through the hole under the casing can trip it. If the plungers pop up and drop back, disconnect the battery while they're up. Otherwise reach the inside handle with a hooked wire past a padded wedge at the top of the frame. If glass must go, spare the rear quarterlight; it's the worst one to replace.
freeTake the door card off
Raise the window first. Check that every rod is clipped in, then unhook them and work the latch lever by hand.
freeSet the rod length
Adjust a turn at a time and test with the door open, closing the latch on a bar. Lock it with a small nut when it's right.
freeLubricate the latch
Graphite or a dry lubricant on the latch and linkage pins, then work it by hand several times.
a can of graphiteReplace the handle
Move your own barrel across so the key still fits, and set the rod before refitting the card.
a door handleReplace the latch assembly
Only when the latch itself won't release with the rods off: its inner parts aren't sold separately.
a latch assemblyWhat it usually isn't
Don't spend money here first:
If none of this finds it:
On jagaux.com
- Jaguar XJ40 Central Locking Not WorkingIf the handle works but the locks won't move, or the key locks and won't unlock.
- Jaguar XJ40 FUSE 1 or FUSE 2 FAIL WarningIf the lock fuse blows and a handle feels warm.
- XJ6 (XJ40) fuse boxesWhich circuit each footwell fuse feeds, other years from the same page.
- Jaguar XJ40 Window Motor, Windows Not WorkingWhile the door card is off, if a window clicks but won't move.
- Jaguar VIN decoderConfirm your exact model year, engine and factory options before ordering parts — free.
Ratings, fuse numbers and torque figures vary by model year and market. Read the legend on your own car before pulling anything, and use the figures in the manual for your car, not the ones in a video.
Check your VIN: exactly which car you have and which bulletins apply to it.