Question about 1987 Toyota Celica

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I have a 1987 Toyota Celica GT convertible. I have been constantly refilling the reservoir for the hydraulic pump. There has been a small puddle on the ground everytime I parked the vehicle after cycling the top. I finally removed the pump from the vehicle and disassembled it to find the internal seal (maybe called a lip seal) which allows the motor shaft to enter the hydraulic side to drive the pump gearing to be cracked and damaged allowing the fluid to seep past the shaft into and out of the motor side.
So basically my question is where can I get the internal seals to make this pump leak proof and fully useful again. Toyota has no internal parts for this and it is a discontinued pump. or is there another vehicle which i can salvage the pump from or an aftermarket cheap pump available?
thank you , tony

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They might be able to help you.

Posted on Sep 24, 2008


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I have a 2007 mustang convertible top that will not go down. with key on windows go to park down position but no hydraulic pump sound checking fuses to ensure good power. where should i begin?

Principles of Operation
Convertible top operation is controlled by the smart junction box (SJB). When the convertible top raise/lower switch is operated, the SJB commands the front and rear windows to the full down position. Window operation is disabled while the convertible top raise/lower switch is being operated. When the SJB receives a full down input for both rear windows, it commands the appropriate relay closed to raise or lower the convertible top. If the SJB does not receive a full down input signal for both rear windows, the convertible top operation is disabled.

The convertible top hydraulic system uses a 12 volt reversible pump and motor assembly. When active, the pump uses hydraulic pressure to extend the hydraulic lift cylinders to raise the convertible top, or retract the hydraulic lift cylinders to lower the convertible top. The convertible top motor/pump assembly is equipped with a thermal circuit breaker. The circuit breaker typically resets after 5 minutes depending on the ambient temperature. The thermal circuit breaker cannot be repaired and must be installed as a unit with the motor/pump assembly. In the event of a hydraulic system failure, the convertible top cannot be operated manually.

Inspection and Verification
  1. Verify the customer concern.
  1. Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection Chart Mechanical Electrical
  • Convertible top brackets and frame
  • Convertible top latches
  • Convertible top pump and motor assembly
  • Hydraulic lift cylinders
  • Hydraulic lines
  • Bussed electrical center (BEC) fuse(s):
    • 13 (40A)
    • 51 (10A)
  • Circuitry
  • Convertible top pump and motor assembly
  • Convertible top ajar switch
  • Convertible top switch
  • Connector(s)
  • Convertible top raise relay
  • Convertible top lower relay
  • LH or RH rear power window motor
  • Smart junction box (SJB)
  • BEC

  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  1. If the cause is not visually evident, connect the scan tool to the data link connector (DLC) and select the vehicle to be tested from the scan tool menu. If the scan tool does not communicate with the vehicle:
    • check that the program card is correctly installed.
    • check the connections to the vehicle.
    • check the ignition switch position.
  1. If the scan tool still does not communicate with the vehicle, refer to the scan tool operating manual.
  1. Carry out the scan tool data link test. If the scan tool responds with:
    • CAN or ISO circuit fault; all electronic control units no response/not equipped, refer to Section 418-00 .
    • No response/not equipped for SJB; refer to Section 419-10 .
    • System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out self-test diagnostics for the SJB.
  1. If the DTCs retrieved are related to the concern, go to the Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index.
  1. If no DTCs related to the concern are retrieved, GO to Symptom Chart .
  2. Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index DTC Description Source Action B1141 Convertible Top Full Down Position Switch Circuit Failure SJB Go To Pinpoint Test E . B1142 Convertible Top Full Up Position Switch Circuit Failure SJB Go To Pinpoint Test E . B1402 Driver Power Window Down Switch Circuit Failure SJB Go To Pinpoint Test A . B2068 Convertible Top Up Output Circuit Failure SJB Go To Pinpoint Test A . B2069 Convertible Top Down Output Circuit Failure SJB Go To Pinpoint Test A . B2481 Convertible Top Up/Down Switch Fault SJB Go To Pinpoint Test A . B2578 Passenger Power Window Down Switch Circuit Failure SJB Go To Pinpoint Test A . All Other DTCs - SJB Refer to Section 419-10 .
  3. Your best bet ,take it to a qualified repair shop !

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1 Answer

How to check for convertible top fluid

The Convertible top hydraulic pump and fluid reservoir are located in the driver side of the trunk area, behind the side trim panel.

Jun 17, 2014 | 1999 BMW 325

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Top worked fine yesterday but today tried to let down only clicked

It is a hydraulic pump that applies pressure to the 2 hydraulic pistons to raise & lower the top. So, check for something obstructing movement first.

The convertible top:
  • is motor-driven.
  • requires parking brake engaged to complete circuit for operation.
  • is equipped with a back window glass (42006) . The back window glass is permanently attached to the folding top back window curtain (52500) and cannot be opened.
  • Damaged fluid reservoir.
  • Damaged folding top hydraulic cylinders .
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  • Open circuit breaker or fuse.
  • Circuitry open/shorted.
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  • Damaged folding top hydraulic lift motor and plate kit .
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The hydraulic roof pump leaks from the reservoir.


Apr 03, 2011 | 1995 Audi Cabriolet

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1996 audi cabriolet 2.8 V6 convertible top motor needs fluid how do i add the fluid to the convertible top motor?! and what type of fluid does it need?

Almost all power convertible tops are electric over hydraulic. The ecectric motor runs a hydraulic pump. The pump pushes fluid to the cylinders that work the top. Most are located behind the rear seat backrest. Either remove the rear backrest or access the motor/pump from the trunl. It will be shaped like a cylinder. At one is the electric motor, at the other end is the hydraulic reservoir. At the end of the reservoir is a rubber plug. With the top down, remove the plug and fill it with tran fluid till it over flows. replace the plug and cycle the top up and down as far as it will go. Repeat the process till it will take no more fluid. A turkey baster with a piece of vacuum line makes a good filler tool. With that said, you must find the leak. You may have a leaking pump, hydraulic line or cylinder. RNever replace one line. Do them all. Always replace cylinders in pairs.

Good luck, Karl at

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1 Answer

My roof is not working and keeps making the worst sounds and the symbol for the convertible keeps blinking. I live outside of the US. Any suggestions.

The most common reason for this is low hydraulic fluid. The noise is probably the pump running while empty. When fluid id present it dampens that noise. Behind the rear seat is the combination motor/pump/reservoir. With the top in the DOWN position, fill the reservoir with ATF and cycle the system a few times as far as it will go. Repeat until the reservoir will take no more fluid. If that works, it is only a patch fix. You must now inspect the lines, motor and cylinders for leaks. The fluid does not evaporate. If it is low, you have a leak. Karl at

Nov 11, 2009 | 2007 Mitsubishi Eclipse Spyder GT...

1 Answer

1998 Mercedes Convertible Top Slow and Drips Oil

Your top is moved by an electric motor wich operates a hydraulic pump which moves two pistons which move the top.
The "oil" thet you see is probably hydraulic fluid leaking from the drain hole in the car near the tire.
You have a leak in the hydraulic system.
You need to start at the motor/pump/reservoir unit behind the seat and find the leak.
Most commonly, it is a bad line. Second in popularity is a bad cylinder(s). Third on the list is the motor/pump/reservoir.
If you replace a line, do them all. If you replace a cylinder, replace them both.

Karl at

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1 Answer

1987 Cavalier RS convertible..The pump for the top runs but the top doesnt move. Checked bypass valve to make sure it was closed. Was thinking maybe hydraulic fluid may be low. Car has been sitting for 4...

You are probably low on fluid.
Behind the rear seat is your motor/pump/reservoir combination.
With the top down, fill the reservoir to overflowing with ATF.
Cycle the system a few times and repeat.
Do this till the reservoir will take no more fluid.
Check the lines and cylinders for leaks. The fluid must be going somewhere.
If you replace any lines or cylinders, always do them in pairs.

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2 Answers

Cannot find the fuse for the convertible top's hydraulic pump

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Jan 09, 2009 | 1992 Toyota Celica

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