A-604 A/T - Diagnostic Procedure
91chrysler02
SUBJECT: A-604 Transaxle Diagnosis
NO.: 21-05-91
GROUP: TRANSMISSION
DATE: Feb. 25, 1991
MODELS:
1989 (AC) DYNASTY/NEW YORKER/LANDAU
(AS) CARAVAN/VOYAGER
1990 - 1991 (AA) SPIRIT/ACCLAIM/LEBARON
(AC) DYNASTY/NEW YORKER/LANDAU/SALON
(AG) DAYTONA
(AJ) LEBARON COUPE/LEBARON CONVERTIBLE
(AS) CARAVAN/GRAND CARAVAN//CARAVAN C/V
VOYAGER/GRAND VOYAGER/TOWN & COUNTRY
(AY) IMPERIAL/NEW YORKER FIFTH AVENUE
DISCUSSION
The A-604 Transaxle is fully electronically controlled. Unlike hydraulic controlled transmissions which required a knowledge of transmission power flow and hydraulic pressure test to diagnose problems, the A-604 requires additional electronic diagnostic steps.
The following diagnostic procedure should be performed whenever there is no obvious transaxle problem such as, transaxle is in the limp-in mode, burnt fluid, stored fault codes, or a no drive condition.
This procedure has been developed to ensure a correct evaluation and/or diagnoses is performed on a customer's "transaxle performance" complaint.
DIAGNOSIS PROCEDURE:
1. Interview the customer, be sure you understand the customer's "transaxle performance" complaint.
2. Review the Technical Service Bulletins for a symptom or condition that matches the customer complaint. If a Technical Service Bulletin applies, perform the bulletin. If no bulletin applies, continue with this procedure.
NOTE: A QUICK REFERENCE OF PREVIOUSLY PUBLISHED TSB'S HAS BEEN INCLUDED (REFER TO PAGES 3 AND 4). REFER TO THE DIAL II INDEX FOR THE LATEST INFORMATION.
3. Check transaxle fluid level.
4. Check and note the condition of the transaxle fluid.
5. Check the operation and adjustment of the transaxle shift linkage.
6. Verify the integrity of the following electrical connections:
NOTE: THIS VERIFICATION DOES NOT REQUIRE DISCONNECTING THE CONNECTORS.
^ A-604 controller.
^ Reverse lamp relay.
^ EATX relay.
^ Solenoid pack.
^ Turbine speed sensor.
^ Output speed sensor.
^ Neutral start switch.
^ PRNODL switch.
^ Throttle position switch
7. Check the engine wiring, for proper retention and routing. Look for chafing in the area of the drive accessories.
8. Check that there are no wires in the blank positions of EATX (transaxle controller) 60-way connector. Use the connector diagram in the appropriate diagnostic procedure manual.
NOTE: THIS CHECK DOES NOT REQUIRE DISCONNECTING THE 60-WAY CONNECTOR.
9. Connect the DRB II to the body diagnostic connector.
10. Perform the shift lever status test as outlined in the appropriate diagnostic procedure manual.
11. If the vehicle passed the shift lever status test, check and record fault code(s).
12. If there are no fault codes, perform the clutch volume test.
13. If clutch volume test is satisfactory, perform a road test with the DRB II connected. The road test should be completed with the customer, so that any complaints or concerns can be discussed.
14. If the vehicle performs normally, return the vehicle to the customer.
TECHNICAL SERVICE BULLETIN INDEX Through January 28, 1991
* 21-09-88 Transaxle Fluid Level Dipstick Not Fully Seated. (November 21, 1988)
* 21-08-89 Revised Reaction Shaft Support. (April 3, 1989)
* 21-10-89 Transmission Cooler Flushing Procedure. (April 24, 1989)
* 21-09-89 Transmission Pressure Testing. (April 24, 1989)
* 21-01-89 Momentary Deceleration, Default To Second Gear (Limp-in) Mode, Or Excessive Clutch Slippage During 3-4 Upshift. (May 22, 1989)
* 21-20-89 Transmission Bearing Preload/Shimming Procedure. (May 30, 1989)
* 21-25-89 High Gearshift Effort Out Of Park. (July 10, 1989)
* 21-28-89 Low Temperature Transmission Failures. (December 29, 1989)
* 21-06-90 Surge Caused By Locking/Unlocking of The Torque Converter On Vehicles Equipped With 3.0L Engine And A-604 Transmission. (February 26, 1990)
* 21-07-90 Intermittent Transmission Engagement, Harsh Shifting, Or Limp-in Mode, On Vehicles Equipped With A-604. (February 26, 1990)
* 21-09-90 0D/REV Clutch Slipping Or Transaxle Shift Bump/"Stop Bump". (April 9, 1990)
* 21-12-90 A-604 Excessive Upshifting/Downshift. (April 9, 1990)
* 21-16-90 A-604 Transaxle Oil Cooler Flushing, Flow Testing. (June 4, 1990)
* 21-22-90 1-2 Upshift Shudder 1989 - 91 Vehicles Equipped with A-604 Transmission. (November 19, 1990)
* 21-24-90 0D/Reverse Clutch Failures And/Or Excessive Metallic Debris In Oil Pan. (December 3, 1990)
POLICY: This labor operation is reimbursable within the provisions of the warranty, and only applies to sold and delivered vehicles. However, no deductible will be taken from the claim. Therefore, this must be a single condition claim. No other repair or special service charge can be included on the claim. Failure to follow this procedure will result in a claim reject for message code El. Should any transaxle related repairs be required, use the prime and diagnostic labor operations that apply to that repair (do not use this labor operation).
TIME ALLOWANCE
Labor Operation No. 21-01-01-01 . . . . . . . . . . 0.6 Hrs.
FAILURE CODE: UC Written description required