Repair Procedures, Modification A, B & Parts Information
REPAIR PROCEDURES
Follow these procedures in order for any noted complaint.
1. ATF Condition and Level (slip, flare, hunting, chatter, vibration, stall, shift shock)
A. If repairing a 1987 vehicle, insure that the proper fluid level gauge is installed.
(P/N FU17 19 880).
NOTE:
Do not overfill when using FU17 gauge.
Distinction of new and old parts.
The revised sections are indicated by an asterisk. Please replace the original bulletin with this revised bulletin.
B. Confirm the proper ATF level.
Warm up the engine for about 5 - 10 minutes (ATF temperature rises to 150~F) and then measure the ATF level. At 150~F, the ATF level should be at the "F" level mark with the engine running in "P" range.
C. If the fluid level is low, check for leakage, especially near the thermo-switch box. Make sure the modified oil pipe is installed on 1988 models. If leakage is found, refer to the illustration below for repair procedures.
NOTE:*
There have been 2 modifications as shown below:
MODIFICATION A
The "U"-shaped oil hose and connector pipe at the thermo switch box have been replaced with an oil line as shown below.
If you observe any leakage from this part, replace the off pipe with the modified one according to the repair procedure in this bulletin.
MODIFICATION B
To provide more clamping force, the length of the bolts at the hose clamps on the cooler line has been increased. If you encounter a complaint of oil leakage at the oil hose, install a new hose with modified clamps.
VIN OF PRODUCTION CHANGE
Modification A.
1988 626/MX-6 vehicles manufactured in Japan
JM1GD**** K1703425 July 11, 1988 *
1988 MX-6 vehicles manufactured in the U.S.A.
1YVGD**** K5200001 August 1, 1988 *
Modification B.
1988 626/MX-6 vehicles manufactured in Japan
JM1GD**** J1537054 October 6, 1987
1988 MX-6 vehicles manufactured in the U.S.A.
1YVGD**** J5104074 December 18, 1987
PARTS INFORMATION
NOTE: * IT IS NOT NECESSARY TO REPLACE THE THERMO SWITCH BOX FOR THIS OPERATION UNLESS THE ORIGINAL IS DAMAGED.
2. Internal Failure (slip, flare, hunting, chatter, vibration, shift shock)
A. Check the condition of the ATF. If it is burnt or discolored, inspect fluid in oil pan. Look for material in ATF.
B. Perform the following:
- performance and stall tests
- repair or replace with rebuild as needed
3. Valve Body Modifications (shudder, surging, slip, flare, chatter, shift shock)
For 1988 626/MX-6, the following four modifications (A, B, C, D) to the valve body and the inner parts have been incorporated in order to correct the slippage and/or chatter when shifting from D1 - D2 and to reduce the shift shock when shifting from D1 - D2 or D2 - D3.
A. Insure that the proper modifications have been made as specified.
^ Beginning No. of transaxle Unit Applicable to each Modification
PARTS INFORMATION
* PART NO. DESCRIPTION
FUO6 21 100V Valve Body (for '87)
FU3H 21 100A Valve Body (for '88 T/C)
FU4G 21 100A Valve Body (for '88 non-T/C)
FUY1 21 227 Accumulator Spring (for '88 T/C)
NOTE:* 1988 T/C Models - repair should include accumulator spring installation to eliminate shift shock.
4. Electrical (all problems)
If vehicle is a 1988 or 1989, use EC-AT tester as per Workshop Manual.
If vehicle is a 1987 model, check the electrical system harness as follows:
A. Check if the EGI harness is properly grounded at the B32 connector. If the terminal is rusted or the bolt is loose, repair it and apply a suitable anti-rust agent. Then, go to step B.
B. Connect an EC-AT tester as per the 1987 626 Workshop Manual. (See page 7B-6)
C. Turn the ignition switch "ON".
D. Check if the throttle sensor voltage is within the following specification and is stabilized (not fluctuating). Specification:
Throttle Closed: 0.4 - 0.6 Volts
Throttle Fully Opened: 4.0 Volts Approximately
If the reading is out of the specified range, adjust the throttle sensor setting as per the workshop manual (page 4A-17). If the throttle sensor voltage fluctuates, go to step F.
E. Start the engine. If any inspection code is shown on the EC-AT Tester, perform the necessary repair as per the workshop manual. Check the idle switch adjustment. Idle switch input indicator should be on at idle and should be off when the accelerator pedal is depressed. If not, check or adjust the idle switch as per the workshop manual. Check the throttle sensor voltage. If the throttle sensor voltage fluctuates, go to step F.
F. Check the EGI and injection harness and their connector. Check if the LgB, GO, LgW, LgR wires are properly connected at B-35 connector. If the terminal is rusted or the harness is cut, clean up the terminal or repair the harness, then apply a suitable anti-rust agent.
Inspect the EGI harness for water or a poor connection under the foam protector area near the B-35 connector. Check the point where the throttle sensor wires LgB, LgW and GO segments are joined by a crimp connection. If it is rusted or moisture is found, solder these connectors and protect them with insulated tape. Make sure the harness is not touching the steering pipe. If the problem can not be solved after performing the above mentioned inspection, go to step G.
G. Check the B-25 and the X-09 connectors to determine if the LgB, GO, LgW and LgR wires are properly connected.
NOTE: The connecting point of the wires may be different depending on the production period of the vehicle.
5. Adjustments (all problems)
A. 2-4 Brake Band Adjustment
Remove the oil pan and gasket located on the underside of the transmission.
Loosen the lock nut and tighten the piston stem exactly at the specified torque.
Tightening Torque:
10 N-m (1.1 m-kg, 98 in.lbs)*
Loosen the piston stem exactly 2 turns.
Tighten the locknut.
Tightening Torque:* 31 N-m (18-29 ft.lbs)
NOTE:* Quick Reference material reads in.lbs instead of ft.lbs in error.
B. Throttle Cable (Line Pressure) Adjustment
Turn off the engine.
Remove the splash shield next to the left front tire.
Remove the square head plug "L" and install the oil pressure gauge set.
Shift into "P" range and start the engine.
Adjust the idle speed to:
Non-Turbo: 750-800 rpm
Turbo: 725 - 775 rpm
Adjust locknuts:
When the locknuts are moved, line pressure is increased or decreased as shown. Adjust the cable locknuts to correct position using the following procedure.
Step 1
Initially install the locknuts fully away from the throttle cam. (Loosen the cable all the way.)
Step 2
Adjust the locknuts in a clockwise direction as viewed from the front of the vehicle until the line pressure begins to increase above the specification shown.
Step 3
Adjust the locknuts in a counterclockwise direction until the line pressure decreases to the specification exactly. Tighten the locknuts.
Standard: * 4.0-4.6 kg/sq.cm (Free play of wire cable should be 0 mm.)
Anti-Flare Up:* 4.6 kg/sq.cm (66 psi or 450 Kpa)
And-Shift Shock:* 4.0 kg/sq.cm (57 psi or 390 Kpa)
NOTE:* If shift shock still occurs, it may be necessary to fine tune line pressure.
NOTE:
Transmission in "P" range.
Turn off the engine.
Apply "Teflon" tape to threads and reinstall the square head plug.