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Automatic Transmission - CD4E: Diagnosis Ford Escape I рестайлинг

Automatic Trans 41 illustrations ~6486 words

Diagnostic Strategy

Note. Do not take short cuts or assume that critical adjustments have already been made.

Troubleshooting an electronically-controlled automatic transaxle is simplified by using the proven method of diagnosis. One of the most important things to remember is that there is a definite procedure to follow. Follow the procedures as written to avoid missing critical components or steps.

To correctly diagnose a concern, the technician may have to use the following

  1. Engine Performance articles
  2. Technical Service Bulletins (TSBs)
  3. Wiring Diagrams
  4. Transmission Tester Manual

This information provides the information required when diagnosing transaxle concerns.

Use the Diagnostic Flow Chart as a guide and follow the steps indicated.

Preliminary Inspection

  1. Know and understand the customer concern.
  2. Verify the concern by operating the vehicle.
  3. Check fluid level and condition.
  4. Check non-factory add-on items.
  5. Check shift linkages for correct adjustment.
  6. Check TSBs for the concern.

Diagnostics

  1. Carry out on-board diagnostic procedures; Key On/Engine Off (KOEO) and Key On/Engine Running (KOER).
  2. Record all diagnostic trouble codes (DTCs).
  3. Repair all non-transaxle codes first.
  4. Repair all transaxle codes second.
  5. Erase all continuous codes and attempt to repeat them.
  6. Repair all continuous codes.
  7. If only pass codes, proceed to diagnosis by symptom charts for further information and diagnosis.

By following the diagnostic sequence, the repair technician will be able to diagnose and repair the concern the first time.

Diagnostic Flow Chart

Diagnostic Flow Chart
1) Did you record any Diagnostic Trouble Codes?YesRepair all hard Diagnostic Trouble Codes. Follow the pinpoint tests. For non-transmission related DTCs, refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid) article, then this article for transmission related DTCs.
NoRefer to DIAGNOSIS BY SYMPTOM , then GO to Step 5.
2) Are any continuous test memory codes present?YesClear codes and carry out drive cycle test.
NoGO to Step 4.
3) Did the continuous test memory codes reappear?YesRepair all continuous test memory codes. Follow the pinpoint tests. For non-transmission related DTCs, refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid), then this article for transmission related DTCs, then GO to Step 4.
NoGO to Step 4.
4) Is the concern repaired?YesCarry out the final quick test to verify that no Diagnostic Trouble Codes are present. Clear memory codes. Return vehicle to customer.
NoRefer to DIAGNOSIS BY SYMPTOM .
5) Are there any electrical concerns?YesInstall the scan tool and carry out output state control test, then GO to Step 6.
NoRefer to the hydraulic and mechanical routine to diagnose and repair the concern, then GO to Step 7.
6) Was the transaxle concern corrected when the scan tool was installed?YesRefer to PINPOINT TEST Z: INTERMITTENT in INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or Z: INTERMITTENT in INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid), intermittent fault diagnosis and use the scan tool to diagnose cause of concern in the processor, vehicle harness or external inputs (sensors or switches).
NoRefer to the hydraulic and mechanical routine to diagnose the concern, then GO to Step 7.
7) Is the concern repaired?YesCarry out the final quick test to verify that no diagnostic trouble codes are present. Clear memory codes. Return the vehicle to the customer.
NoNo further testing is available. Repeat procedures as necessary.

DIAGNOSTIC FLOW CHART

The following items must be checked before proceeding

Road Testing Vehicle

Note. Always drive the vehicle in a safe manner according to driving conditions and obey all traffic laws.

The Shift Point Road Test and Torque Converter Clutch Operation Test provide diagnostic information on transmission shift controls and torque converter operation.

Shift Point Road Test

This test verifies that the shift control system is operating correctly.

  1. Bring the engine and transaxle up to normal operating temperature.
  2. Operate the vehicle with the transaxle range selector lever in the (D) position.
  3. Apply minimum throttle and observe the speeds at which upshift occurs and torque converter engages. Refer to the following «SHIFT SPEED REFERENCE CHART»(ref-232215-S06630411482006051600000) . CAUTION: Do not exceed posted speed limits when carrying out this test. NOTE: Shift speed ranges are approximate for all applications. SHIFT SPEED REFERENCE CHART Throttle Position OD Position Shift 3.0L Km/h (mph) 2.3L Km/h (mph) Closed 4-3 61 (38) 45 (28) 3-2 32 (20) 27 (17) 2-1 13 (8) 13 (8) Minimum Monitor PID TP Volt 1.25 1-2 21 - 26 (13 - 16) 16 - 24 (10 - 15) 2-3 37 - 43 (23 - 27) 30 - 34 (19 - 21) 3-4 68 - 71 (42 - 44) 51 - 55 (32 - 34) Wide Open Throttle 1 - 2 72 (45) 68 (42) 2 - 3 129 (80) 114 (71) 3 - 4
  4. Coasting 2-1 downshift procedure: accelerate the vehicle from a stop to 19-24 km/h (12-15 mph). Release the accelerator and coast down or lightly brake the vehicle. The coast downshift may be nearly imperceptible to the driver.
  5. With the vehicle in (D)(4th gear), depress the transmission control switch. The transaxle should downshift to 3rd gear. Remove foot from the accelerator pedal; engine braking should occur. The torque converter clutch will not reapply with closed throttle. Depending on vehicle speed, the torque converter clutch should disengage and then reapply after the accelerator pedal has been pressed.
  6. Depress the accelerator pedal to the floor. Depending on vehicle speed, the transaxle should shift from 3rd to 2nd gear, or 3rd to 1st.
  7. With the vehicle in (D) range above 80 km/h (50 mph) and less than half throttle, move the transaxle range selector lever from (D) range to manual 2 range and remove foot from the accelerator pedal. The transaxle should immediately downshift into 2nd gear. With the vehicle remaining in manual 2 range, move the transaxle range selector lever into manual 1 range and release the accelerator pedal. The transaxle should downshift into 1st gear at speeds below 48-56 km/h (28-32 mph) for 3.0L engine and 43 km/h (27 mph) for the 2.3L engine.
  8. If the transaxle fails to upshift/downshift or the torque converter does not apply and release, refer to the «DIAGNOSIS BY SYMPTOM»(ref-232215-S03959909232006051600000) for possible causes.

Visual Inspection

This inspection will identify modifications or additions to the vehicle operating system that can affect diagnosis.

  1. Vehicle modification
  2. Electronic add-on items
  3. Air conditioning
  4. Generators (alternators)
  5. Engine turbo
  6. Cellular telephone
  7. Cruise control
  8. CB radio
  9. Linear boosters
  10. Backup alarm signals
  11. Computer
  1. The above items, if not correctly installed, will affect powertrain control module (PCM) or transaxle function. Pay particular attention to add-on wiring splices in the PCM harness or transaxle wiring harness, abnormal tire size or axle ratio changes.
  2. Leaks. Refer to «LEAKAGE INSPECTION»(ref-232215-S19240125162006051600000) .
  3. Correct linkage adjustments. Refer to «AUTOMATIC TRANSAXLE-TRANSMISSION EXTERNAL CONTROLS - CD4E»(ref-232269) .

Carry Out On-Board Diagnostics

After a road test, with the vehicle warm and before disturbing any connectors, carry out the Quick Test using the scan tool. Refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid).

Transaxle Drive Cycle Test

Note. The Transaxle Drive Cycle Test must be carried out exactly. Faults have to occur consecutively for codes P0731, P0732, P0733 and P0734 to be set, and 5 times consecutively for continuous codes P0741 and P1741.

Note. When carrying out the Transaxle Drive Cycle Test, refer to the SOLENOID OPERATION CHART for correct solenoid operation. For additional information, refer to PINPOINT TESTS - NON OSC EQUIPPED VEHICLE .

  1. Record and then erase Quick Test codes.
  2. Warm engine to normal operating temperature.
  3. Make sure transmission fluid level is correct.
  4. With transaxle in (D) position, press transmission control switch (TCS) (LED lamp should illuminate) and moderately accelerate from a stop to 64 km/h (40 mph). This allows the transaxle to shift into 3rd gear. Hold the speed and throttle opening steady for a minimum of 15 seconds (30 seconds above an altitude of 4000 feet above sea level).
  5. Press TCS (LED lamp should turn off) and accelerate from 64 km/h (40 mph) to 80 km/h (50 mph). This allows the transaxle to shift into 4th gear. Hold the speed and throttle opening steady for a minimum of 15 seconds.
  6. With the transaxle in 4th gear and maintaining steady speed and throttle opening, lightly apply brake pedal (to operate stop lamps). Then hold the speed and throttle steady for an additional 5 seconds (minimum).
  7. Brake to a stop and remain stopped for a minimum of 20 seconds.
  8. Repeat Steps 4 through 6 at least 5 times.
  9. Carry out Quick Test and record continuous codes.

Diagnostic Trouble Code (DTC) Charts

Four-Digit DTCComponentDescriptionConditionSymptomAction
P1116ECTECT out of self-test range.ECT temperature higher or lower than expected during KOEO and KOER.Rerun self-test at normal operating temperature.Refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid).
P0117ECTECT indicates 125°C (254°F).ECT temperature higher or lower than expected during KOEO and KOER.Torque converter clutch will always be off, resulting in poor fuel economy.Refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid).
P0118ECTECT indicates -40°C (-40°F).ETC temperature higher or lower than expected during KOEO and KOER.Torque converter clutch will always be off, resulting in poor fuel economy.Refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid).
P1124TPTP voltage high/low for self-test.TP was not in the correct position for self-test.Rerun at appropriate TP position per application.Refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid).
P0122, P0123, P1120, P1121, P1125TPTP fault codes.Processor assembly has detected an error. This error may cause a transaxle concern. Refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid) for diagnosis.Harsh engagements, firm shift feel, abnormal shift schedule, torque converter clutch does not engage. Torque converter clutch cycling.Processor assembly has detected an error. This error may cause a transaxle concern. Refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid).
P0102, P0103, P1100, P1101MAFMAF fault codes.MAF system has a fault which may cause a transaxle concern. Refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid) for diagnosis.Incorrect shift schedule, high/low EPC pressure. Incorrect converter engagement scheduling, symptoms similar to a TPS failure.Refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid) for diagnosis.
P0300, P0308, P0320, P0340, P1351, P1364El SystemEl system fault codes.Ignition system has a fault which may cause a transaxle concern. Refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid) for diagnosis.Engine fault, no torque converter engagement, late WOT shifts.Refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid).
P1705TRTR not in PARK.Self-test not run in PARK.Rerun self-test in PARK.GO to PINPOINT TEST D .
P1703BPPBrake not actuated during self-test.Brake not cycled during KOER.Failed on or not connected - converter clutch will not engage at less than 1/3 throttle.Refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid).
P1703BPPBPP switch circuit failed.Brake pedal position switch circuit failure.Failed off - converter clutch will not disengage when brake is applied.Refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid).
P1460A/CA/C switch error.A/C or defrost on condition may result from A/C clutch being on during quick test.Failed ON - EPC pressure slightly low with A/C off. Failed off - EPC pressure slightly low with A/C on.Refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid).
P0962, P0748EPCEPC solenoid circuit failure, shorted to ground.Voltage through EPC solenoid is checked and compared to a voltage through solenoid after a time delay. An error will be noted if tolerance is exceeded. KOEO and continuous self-test.Short to ground: limit engine torque (partial fuel shut-off, heavy misfire). Minimum line pressure.GO to PINPOINT TEST E .
P0960 (1)EPCEPC solenoid circuit failure, open circuit.Voltage through EPC solenoid is checked and compared to a voltage through solenoid after a time delay. An error will be noted if tolerance is exceeded. KOEO and continuous self-test.Open circuit - causes maximum EPC pressure, harsh engagements and shifts.GO to PINPOINT TEST E .
P0731 (2)SSA, SSB, or internal parts1st gear failure.No 1st gear.Harsh shifts. Incorrect gear selection depending on condition mode and manual lever position: see SOLENOID ON/OFF CHART . Shift errors may also be due to other internal transaxle concerns (such as stuck valves, damaged friction material).GO to PINPOINT TEST A .
P0732 (2)SSA, SSB, or internal parts2nd gear failure.No 2nd gear.Harsh shifts. Incorrect gear selection depending on condition mode and manual lever position: see SOLENOID ON/OFF CHART . Shift errors may also be due to other internal transaxle concerns (such as stuck valves, damaged friction material).GO to PINPOINT TEST A .
P0733 (2)SSA, SSB, or internal parts3rd gear failure.No 3rd gear.Harsh shifts. Incorrect gear selection depending on condition mode and manual lever position: see SOLENOID ON/OFF CHART . Shift errors may also be due to other internal transaxle concerns (such as stuck valves, damaged friction material).GO to PINPOINT TEST A .
P0734 (2)SSA, SSB or internal parts4th gear failure.No 4th gear.Harsh shifts. Incorrect gear selection depending on condition mode and manual lever position: see SOLENOID ON/OFF CHART . Shift errors may also be due to other internal transaxle concerns (such as stuck valves, damaged friction material).GO to PINPOINT TEST A .
P1780TCSTransmission control switch not changing states during self-test.Transmission control switch not cycled during self-test. Circuit open or shorted.No overdrive cancel when switch is cycled.Rerun self-test and cycle switch. Refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid).
P0707TRTR out of range. Shorted circuit or sensor.TR sensor, circuit or powertrain control module shorted to ground.Harsh shifts or engagements.GO to PINPOINT TEST D .
P0708TRTR out of range. Open circuit or sensor.TR sensor, circuit or powertrain control module indicate open.Harsh shifts or engagements.GO to PINPOINT TEST D .
P1702TRTransmission range sensor circuit.Transmission range sensor circuit intermittent.Harsh shifts or engagements.GO to PINPOINT TEST D .
P0966 (1)3-2T/CCS3-2T/CCS solenoid circuit failure - short.3-2T/CCS circuit fails to provide voltage drop across solenoid. Circuit shorted during self-test.Failed on - no engine braking (except in (D)), delayed 3-2 downshifts.GO to PINPOINT TEST G .
P0964 (1)3-2T/CCS3-2T/CCS solenoid circuit failure - open.3-2T/CCS circuit fails to provide voltage drop across solenoid. Circuit open or processor drive circuit failure during self-test.Failed off - engine braking in second/third gears, firm or flared 3-2 downshifts. Harsh 4-3 downshifts.GO to PINPOINT TEST G .
P1742, P1743 (3)TCCTCC solenoid failed ON or OFF.TCC solenoid has failed ON or OFF by electrical, mechanical or hydraulic concern.Harsh shifts or engagements. Engine RPM higher or lower than expected.GO to PINPOINT TEST C .
P0743 (1) , P0740 (3)TCCTorque converter clutch solenoid circuit failure, open or shorted.TCC solenoid circuit fails to provide voltage drop across solenoid. Circuit open, shorted or processor drive failure.Harsh shifts or engagements. Engine RPM higher or lower than expected.GO to PINPOINT TEST C .
P1744, P0741 (3)TCCTCC function check.Excessive slip detected during full TCC engagement.Harsh shifts or engagements. Engine RPM higher or lower than expected.GO to PINPOINT TEST C .
P0750 (1) , P0753 (3)SSASSA solenoid circuit failure, open or shorted.Solenoid A circuit failed to provide voltage drop across solenoid. Circuit open or shorted or processor driver failure during self-test.Incorrect gear selection depending on condition mode and manual lever position.See the SOLENOID OPERATION CHART , refer to PINPOINT TESTS - NON OSC EQUIPPED VEHICLE . GO to PINPOINT TEST A .
P1714SSASSA fault.Mechanical failure of the solenoid detected.Incorrect gear selection depending on condition, mode and manual lever position.See the SOLENOID OPERATION CHART , refer to PINPOINT TESTS - NON OSC EQUIPPED VEHICLE . GO to PINPOINT TEST H .
P1715SSBSSB fault.Mechanical failure of the solenoid detected.Incorrect gear selection depending on condition, mode and manual lever position.See the SOLENOID OPERATION CHART , refer to PINPOINT TESTS - NON OSC EQUIPPED VEHICLE . GO to PINPOINT TEST H .
P0755 (1) , P0758 (3)SSBSSB solenoid circuit failure, open or shorted.Solenoid B circuit failed to provide voltage drop across solenoid. Circuit open or shorted or processor driver failure during self-test.Incorrect gear selection depending on condition mode and manual lever position.See the SOLENOID OPERATION CHART , refer to PINPOINT TESTS - NON OSC EQUIPPED VEHICLE . GO to PINPOINT TEST A .
P0721OSSOSS signal noisy.PCM has detected a noisy OSS sensor signal.Harsh shifts, abnormal shift schedule operation.GO to PINPOINT TEST F .
P0720OSSInsufficient input from OSS sensor.PCM has detected a loss of OSS signal during operation.Harsh shift, abnormal shift schedule operation.GO to PINPOINT TEST F .
P0722OSSOSS signal intermittent.PCM has detected an intermittent OSS signal.Harsh shift, abnormal shift schedule operation.GO to PINPOINT TEST F .
P0717TSSTurbine shaft speed sensor circuit - signal.PCM has detected NO TSS signal.Possible harsh shifts, converter locks, or engagements.GO to PINPOINT TEST F .
P0715TSSInsufficient input from turbine speed sensor.PCM detected a loss of TSS signal during operation.No torque converter engagements or harsh shifts. No 4th gear operation and engine braking in 2nd and 3rd gear.GO to PINPOINT TEST F .
P0718TSSTurbine shaft speed sensor circuit intermittent.PCM has detected a noisy TSS signal.Possible harsh shifts, converter locks or engagements.GO to PINPOINT TEST F .
P0711TFTTransmission Temperature sensor in range failure.The PCM has detected no change in TFT during normal operation.Substitute ECT temperature reading.GO to PINPOINT TEST B .
P0712TFT150°C (302°F) indicated TFT sensor circuit grounded.Voltage drop across TFT sensor exceeds temperature of 150°C (302°F).Incorrect torque converter clutch operation. Incorrect EPC pressure control.GO to PINPOINT TEST B .
P0713TFT40°C (-40°F) indicated TFT sensor circuit open.Voltage drop across TFT sensor exceeds scale set for temperature -40°C (-40°F).Incorrect torque converter clutch operation. Incorrect EPC pressure control.GO to PINPOINT TEST B .
P1711TFTTFT out of ST range.Transaxle not at operating temperature during self-test.Warm or cool transaxle to normal operating temperature.GO to PINPOINT TEST B .
P1783TFTTransmission overtemp condition indicated.Transmission fluid temperature exceeded 127°C (270°F).Increased line pressure.GO to PINPOINT TEST B .
P1636Inductive signature clipInductive signature clip communication.PCM has detected an internal error.Refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid).
P1782P/E switchPerformance/economy switch circuit out of self-test range (if equipped).P/E switch not cycled during self-test or shorted/opened.No change in states when cycled.Rerun self-test and cycle switch. Refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid).
P1501VSSVSS input Out of Self-Test Range.PCM detected presence of a VSS signal during self-test.No transmission symptom.Refer to INTRODUCTION - GASOLINE article for Escape (gasoline) and Mariner or INTRODUCTION- HYBRID ESCAPE article for Escape (Hybrid).
P0963EPCEPC solenoid circuit failure, short circuit to VBAT.Voltage through EPC solenoid is checked. An error will be noted if tolerance is exceeded.Short to VBAT: maximum EPC pressure, harsh engagements and shifts. May flash the TCIL.GO to PINPOINT TEST E .
P07783-2 T/CCS solenoid3-2 T/CCS solenoid or circuit electrical intermittent failures detected.Voltage through 3-2T/CCS solenoid and circuit are checked. An error will be noted if tolerance is exceeded.May flash the TCIL.GO to PINPOINT TEST G .
P09673-2 T/CCS solenoid3-2 TCCS solenoid circuit failure, short circuit to VBAT.Voltage through 3-2T/CCS solenoid and circuit are checked. An error will be noted if tolerance is exceeded.May flash the TCIL.GO to PINPOINT TEST G .
(1) Output circuit check, generated only by electrical symptoms. (2) May also be generated by some other non-electric transaxle hardware system. (3) The TCIL code will set on the first fault occurrence. On the second fault occurrence plus the second power up, the MIL and TCIL will illuminate.
(1)Output circuit check, generated only by electrical symptoms.
(2)May also be generated by some other non-electric transaxle hardware system.
(3)The TCIL code will set on the first fault occurrence. On the second fault occurrence plus the second power up, the MIL and TCIL will illuminate.

DIAGNOSTIC TROUBLE CODE CHART

PINPOINT TEST A: SHIFT SOLENOIDS

Note. see scheme 10preceding these pinpoint tests.

Scheme 24

Scheme 24: PINPOINT TEST A: SHIFT SOLENOIDS
Scheme 24: PINPOINT TEST A: SHIFT SOLENOIDS

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Scheme 36
  1. A1 ELECTRONIC DIAGNOSTICS Key in OFF position. Make sure the transaxle vehicle harness connector is fully seated, terminals are fully engaged in connector and in good condition before proceeding. Connect the scan tool. Key in ON position. Carry out KOEO Test until continuous DTCs have been displayed. Enter Output Test Mode (OTM). Refer to «ON-BOARD DIAGNOSTICS»(ref-232215-S30318432552006051600000) . Select the mode ALL ON. Push START to turn outputs on. Push STOP to turn outputs off. Does the vehicle enter OTM? Yes : REMAIN in OTM. GO to A2. No : PRESS START. If vehicle does not enter OTM, refer to «INTRODUCTION - GASOLINE»(ref-229953) article for Escape (gasoline) and Mariner or «INTRODUCTION- HYBRID ESCAPE»(ref-235202) article for Escape (Hybrid).
  2. A2 CHECK ELECTRICAL SIGNAL OPERATION Key in OFF position. Disconnect: Transaxle Connector. Use a mirror to inspect both ends of the transaxle connector for damaged or pushed-out pins, corrosion, loose wires and missing or damaged seals. Key in ON position. Measure the voltage between pin 5 and solenoid circuit pins 4 and 6 at the transaxle vehicle harness connector. While observing the VOM, press START and STOP to cycle the solenoid output on and off. Does the suspected solenoid output voltage change at least 0.5 volt? Yes : GO to A5 . No : GO to A3.
  3. A3 CHECK CONTINUITY OF SOLENOID SIGNAL AND VPWR HARNESS CIRCUITS Key in OFF position. Disconnect: Transaxle Connector. Disconnect: PCM. Inspect for damaged or pushed-out pins, corrosion or loose wires. Measure the resistance between the PCM connector pin T43 and the transaxle vehicle harness connector pin 6. Measure the resistance between the PCM connector pin T42 and the transaxle vehicle harness connector pin 4. Measure the resistance between the PCM connector pins C35 and C36 and the transaxle vehicle harness connector pin 5. Is each resistance less than 5 ohms? Yes : GO to A4. No : REPAIR open circuit(s). RECONNECT all components. RERUN Quick Test.
  4. A4 CHECK SOLENOID HARNESS FOR SHORT TO POWER AND GROUND Measure the resistance between the PCM connector pin T43 and the PCM connector pins C35 and C36. Measure the resistance between the PCM connector pin T42 and the PCM connector pins C35 and C36. Measure the resistance between the PCM connector pin T43 and the PCM connector pins C47, C48, C49 and chassis ground. Measure the resistance between the PCM connector pin T43 and the PCM connector pin T41 and chassis ground. Measure the resistance between the PCM connector pin T42 and the PCM connector pins C47, C48, C49 and chassis ground. Measure the resistance between the PCM connector pin T42 and the PCM connector pin T41 and chassis ground. Is each resistance greater than 10,000 ohms? Yes : GO to A5. No : REPAIR short circuit(s). RECONNECT all components. RERUN Quick Test.
  5. A5 TRANSAXLE FUNCTIONAL TEST CAUTION: Do not pry on the connector. This will damage the connector and can result in a transaxle concern. Press button and pull up on the transaxle vehicle harness connector. NOTE: LED will turn GREEN when solenoid activates and turn OFF when deactivated. LED will turn RED if an activated solenoid/harness is shorted to B+. LED will remain OFF if an activated solenoid/harness is shorted to ground or no continuity (open circuit). Disconnect: Transaxle Harness. Connect: Transmission Tester. Carry out the Solenoid Function Tests as outlined in the Transmission Tester Manual. Do the solenoids (LED) activate (LED green)? Yes : GO to A6. No : GO to A7 .
  6. A6 TRANSAXLE DRIVE CYCLE TEST Connect: PCM. Carry out the Dynamic Testing - Engine On as outlined in the Transmission Tester Manual. Does the vehicle upshift when commanded by the tester? Yes : INSTALL a new PCM. RECONNECT all components. RERUN On-Board Diagnostics Tests. If symptoms are still present, REFER to «DIAGNOSIS BY SYMPTOM»(ref-232215-S03959909232006051600000) . No : GO to A7.
  7. A7 CHECK RESISTANCE OF SOLENOID/HARNESS Place the Bench/Drive switch in BENCH mode. Rotate solenoid select switch to OHMS CHECK position. Measure the resistance between SS-1 jack and VPWR jack on tester. Measure the resistance between SS-2 jack and VPWR jack on tester. Is the resistance for both solenoids between 12 and 22 ohms? Yes : GO to A8. No : INSTALL a new solenoid body assembly. RECORD and CLEAR the DTCs. RERUN On-Board Diagnostics tests.
  8. A8 CHECK SOLENOID/HARNESS FOR SHORT TO GROUND Measure the resistance of each solenoid between BAT (-) jack (engine ground) and each appropriate jack. Is the resistance greater than 10,000 ohms (no continuity)? Yes : REFER to «DIAGNOSIS BY SYMPTOM»(ref-232215-S03959909232006051600000) . No : INSTALL a new solenoid body assembly. RECORD and CLEAR the DTCs. RERUN On-Board Diagnostics tests.

PINPOINT TEST B: TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR

Note. see scheme 10preceding these pinpoint tests.

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Scheme 37: PINPOINT TEST B: TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR
Scheme 37: PINPOINT TEST B: TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR

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  1. B1 ELECTRONIC DIAGNOSTICS Make sure the transaxle vehicle harness connector is fully seated, terminals are fully engaged in connector and in good condition before proceeding. Have the items been checked? Yes : GO to B2. No : CARRY OUT checks. CLEAR the DTCs. RERUN Quick Test.
  2. B2 ELECTRONIC DIAGNOSTICS Key in OFF position. Connect the scan tool. Key in ON position. Select Diagnostic Data Link. Select PCM. Select PID/Data Monitor and Record. Enter the following diagnostic mode on the scan tool: PIDs; TFT, TFTV. Does the vehicle enter PID/Data Monitor and Record? Yes : REMAIN in PID/Data Control. GO to B3. No : REPEAT procedure to enter PID. If vehicle did not enter PID, refer to «INTRODUCTION - GASOLINE»(ref-229953) article for Escape (gasoline) and Mariner or «INTRODUCTION- HYBRID ESCAPE»(ref-235202) article for Escape (Hybrid).
  3. B3 CHECK ELECTRICAL SIGNAL OPERATION While monitoring the TFT PIDs, carry out the following test: If transmission is cold, run transmission to warm it up. If transmission is warm, allow transmission to cool down. Do the TFT PIDs increase as the transmission is warmed or decrease as the transmission is cooled or does the TFT or TFTV drop in and out of range? Yes : If the TFT PIDs increase as the transmission is warmed or decrease as the transmission is cooled, CLEAR all DTCs. ROAD TEST to verify if concern is still present. If concern is still present, REFER to «DIAGNOSIS BY SYMPTOM»(ref-232215-S03959909232006051600000) to diagnose transmission overheating. If the TFT or TFTV is in and out of range, INSPECT for intermittent concern in the internal/external harness, sensor or connector. No : GO to B4.
  4. B4 CHECK ELECTRICAL SIGNAL OPERATION CAUTION: Do not pry on the connector. This will damage the connector and can result in a transaxle concern. Press button and pull up on the transaxle vehicle harness connector. Key in OFF position. Disconnect: Transaxle Connector. Use a mirror to inspect both ends of the connector for damaged or pushed-out pins, corrosion, loose wires and missing or damaged seals. Measure the voltage between pin 3 and pin 2 of the transaxle vehicle harness connector. Key in ON position. Is the voltage between 4.75 and 5.25 volts? Yes : GO to B7 . No : GO to B5.
  5. B5 CHECK RESISTANCE OF TFT SENSOR Disconnect: Transaxle Connector. Measure the resistance between pin 3 and pin 2 of the transaxle vehicle harness connector. Record the resistance. The resistance should be approximately within the following range. TRANSMISSION FLUID TEMPERATURE REFERENCE °C °F Resistance (Ohms) -40° to -20° .40° to -4° 967 - 284 -19° to -1° -3° to 31° 284 - 100 0° - 20° 32° - 68° 100 - 37 21° - 40° 69° - 104° 37- 16 41° - 70° 105° - 158° 16 - 5 71° - 90° 159°. 194° 5 - 2.7 91° - 110° 159° - 230° 2.7 - 1.5 111° - 130° 231° - 266° 1.5 - 0.8 131° - 150° 267° - 302° 0.8 - 0.54 Is the resistance within range? Yes : REFER to «DIAGNOSIS BY SYMPTOM»(ref-232215-S03959909232006051600000) . No : GO to B6.
  6. B6 CHECK CONTINUITY OF TFT AND SIGNAL RTN CIRCUITS Key in OFF position. Disconnect: Transaxle Connector. Disconnect: PCM. Measure the resistance between the PCM pin T29 and the transaxle connector signal pin 3 harness side. Measure the resistance between the PCM pin T41 and the transaxle connector signal pin 2 harness side. Are both resistances less than 5 ohms? Yes : GO to B7. No : REPAIR open circuit(s). RECONNECT all components. CLEAR the DTCs. RERUN Quick Test.
  7. B7 CHECK TFT CIRCUIT FOR SHORT TO VPWR AND GROUND Measure the resistance between the PCM pin T29 and the PCM pins C35 and C36. Measure the resistance between the PCM pin T29 and the PCM pins C47, C48 and C49. Measure the resistance between the PCM pin T29 and the PCM pin T41. Is each resistance greater than 10,000 ohms? Yes : GO to B8. No : REPAIR shorted circuit(s). RECONNECT all components. CLEAR the DTCs. RERUN Quick Test.
  8. B8 CHECK TFT SENSOR/HARNESS FOR SHORT TO GROUND Disconnect: Transaxle Connector. Connect: Transmission Tester. Measure the resistance between BAT- jack (engine ground) and appropriate jack (-TFT and +TFT). Is the resistance greater than 10,000 ohms? Yes : INSTALL a new solenoid assembly. RERUN On-Board Diagnostics test. No : RERUN On-Board Diagnostics test. INSTALL a new powertrain control module.

PINPOINT TEST F: TURBINE SHAFT SPEED (TSS) SENSOR AND OUTPUT SHAFT SPEED (OSS) SENSOR

Note. see scheme 11or see scheme 12 preceding these pinpoint tests.

Scheme 45

Scheme 45: PINPOINT TEST F: TURBINE SHAFT SPEED (TSS) SENSOR AND OUTPUT SHAFT SPEED (OSS) SENSOR
Scheme 45: PINPOINT TEST F: TURBINE SHAFT SPEED (TSS) SENSOR AND OUTPUT SHAFT SPEED (OSS) SENSOR

Scheme 46

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Scheme 55

Scheme 55
Scheme 55
  1. F1 ELECTRONIC DIAGNOSTICS Check to make sure the transmission harness connector is fully seated, terminals are fully engaged in connector and in good condition before proceeding. Connect the scan tool. Key in ON position. Enter the following diagnostic mode on the scan tool: Diagnose Data Link. Enter the following diagnostic mode on the scan tool: PCM. Select PID/Data Monitor and Record. Select the following PIDs: TSS, OSS. Does the vehicle enter PID/Data Monitor and Record? Yes : REMAIN in PID/DATA. GO to F2. No : RERUN procedure to enter PID. If vehicle did not enter PID, refer to «INTRODUCTION - GASOLINE»(ref-229953) article for Escape (gasoline) and Mariner or «INTRODUCTION- HYBRID ESCAPE»(ref-235202) article for Escape (Hybrid).
  2. F2 DRIVE CYCLE TEST While monitoring the appropriate sensor PID, drive the vehicle so that the transaxle upshifts and downshifts through all the gears. Does the TSS or OSS Speed PID increase and decrease with engine and vehicle speed or is the sensor signal erratic (drop to zero or near zero and return to normal operation)? Yes : If the TSS or OSS Speed PID increase and decrease with engine and vehicle speed, CLEAR all DTCs. ROAD TEST, to VERIFY if concern is still present. If concern is still present, REFER to «DIAGNOSIS BY SYMPTOM»(ref-232215-S03959909232006051600000) . If the sensor signal is erratic, INSPECT for intermittent concern in the external harness, sensor, PCM or connector. No : If the TSS or OSS Speed PID does not increase and decrease with engine and vehicle speed, the sensor signal is steady. INSPECT for open or short in vehicle harness, sensor, a PCM concern or internal hardware concern. GO to F3.
  3. F3 CHECK CONTINUITY OF TSS OR OSS HARNESS CIRCUITS CAUTION: Do not pry on the connector. This will damage the connector and can result in a transaxle concern. Press button and pull up on the transaxle vehicle harness connector. Key in OFF position. Disconnect: OSS or TSS Sensor. Disconnect: PCM. Inspect for damaged or pushed-out pins, corrosion or loose wires. Measure the resistance between the PCM pin T15 and TSS (+) signal circuit, harness side pin 1. Measure the resistance between the PCM pin C50 and TSS (-) signal circuit, harness side pin 2. Measure the resistance between the PCM pin T4 and OSS (+) signal circuit, harness side pin 2. Measure the resistance between the PCM pin C50 and OSS (-) signal circuit, harness side pin 1. Is each resistance less than 5 ohms? Yes : GO to F4. No : REPAIR open circuit(s). RECONNECT all components. CLEAR the DTCs. RERUN On-Board Diagnostics.
  4. F4 CHECK TSS CIRCUITS OR OSS CIRCUITS FOR SHORT TO POWER AND GROUND Key in OFF position. Disconnect: TSS or OSS. Measure the resistance between the PCM pin T15 and the PCM pins C35 and C36. Measure the resistance between the PCM pin T4 and the PCM pins C35 and C36. For the TSS and OSS (-), measure the resistance between the PCM pin C50 and the PCM pins C35 and C36. Measure the resistance between the PCM pin T15 and the PCM pins C47, C48, C49 and C50. Measure the resistance between the PCM pin T4 and the PCM pins C47, C48, C49 and C50. Is each resistance greater than 10,000 ohms? Yes : GO to F5. No : REPAIR short circuit(s). RECONNECT all components. ERASE DTCs and RERUN On-Board Diagnostics.
  5. F5 TSS OR OSS FUNCTIONAL TEST CAUTION: Do not pry on the connector. This will damage the connector and can result in a transaxle concern. Press and pull transaxle vehicle harness connector. Connect: PCM. Disconnect: TSS or OSS. Connect: Transmission Tester. Connect the transmission tester to the TSS or OSS sensor. Measure the voltage between +TSS or +OSS to -TSS or -OSS. Set VOM to AC. Does voltage increase with an increase in vehicle speed? Yes : INSTALL a new PCM. No : GO to F6.
  6. F6 CHECK RESISTANCE OF TSS OR OSS SENSOR NOTE: Refer to Transmission Tester for terminal locations. Measure the resistance between +TSS/+OSS jack and -TSS/-OSS jack on the Transmission Tester. Record the resistance. SENSOR RESISTANCE Sensor Resistance (Ohms) TSS 625 - 1,150 OSS 503 - 1,010 Is resistance within specification for the appropriate sensor? Yes : GO to F7. No : INSTALL a new TSS/OSS sensor. REFER to «TURBINE SHAFT SPEED (TSS) SENSOR»(ref-232215-S22328453802006051600000) or «OUTPUT SHAFT SPEED (OSS) SENSOR»(ref-232215-S30928046302006051600000) . TEST the system for normal operation.
  7. F7 CHECK SENSOR FOR SHORT TO GROUND Measure the resistance between BAT-jack (engine ground) and OSS/TSS (+), OSS/TSS (-) jack on the Transmission Tester. Is the resistance greater than 10,000 ohms? Yes : For TSS, GO to F8. For OSS, GO to F10 . No : INSTALL a new TSS or OSS sensor. REFER to «TURBINE SHAFT SPEED (TSS) SENSOR»(ref-232215-S22328453802006051600000) or «OUTPUT SHAFT SPEED (OSS) SENSOR»(ref-232215-S30928046302006051600000) . GO to F5 .
  8. F8 CHECK TSS MAGNETISM Remove the TSS sensor from transaxle. Place the TSS sensor against a metal surface to which it should stick. The TSS sensor should be magnetized and stick to the metal surface. Does TSS sensor stick? Yes : GO to F9. No : INSTALL a new TSS sensor. REFER to «TURBINE SHAFT SPEED (TSS) SENSOR»(ref-232215-S22328453802006051600000) . GO to F5 .
  9. F9 CHECK EXCITER WHEEL NOTE: Make sure a tooth is visible. The exciter wheel will always be visible through the TSS sensor hole. Remove the TSS sensor. With a remote starter switch, start and stop engine until a tooth of the exciter wheel is visible through the TSS sensor hole. Are all 4 teeth present? Yes : INSTALL a new TSS sensor. REFER to «TURBINE SHAFT SPEED (TSS) SENSOR»(ref-232215-S22328453802006051600000) . TEST the system for normal operation. No : REPAIR or INSTALL a new exciter wheel as necessary. TEST the system for normal operation.
  10. F10 CHECK OSS MAGNETISM Remove OSS sensor from transaxle. Place the OSS sensor against a metal surface to which it should stick. The OSS sensor should be magnetized and stick to the metal surface. Does the OSS sensor stick? Yes : The concern is not in the OSS sensor system. REFER to «DIAGNOSIS BY SYMPTOM»(ref-232215-S03959909232006051600000) shift concerns for further diagnosis. No : INSTALL a new OSS sensor. REFER to «OUTPUT SHAFT SPEED (OSS) SENSOR»(ref-232215-S30928046302006051600000) .

Scheme 56

Scheme 56: PINPOINT TEST G: TIMING/COAST CLUTCH SOLENOID (3-2T/CCS)
Scheme 56: PINPOINT TEST G: TIMING/COAST CLUTCH SOLENOID (3-2T/CCS)

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Scheme 63
  1. G1 ELECTRONIC DIAGNOSTICS Key in OFF position. Connect: Transaxle Connector. Connect the scan tool. Key in ON position. Carry out KOEO Test until continuous DTCs have been displayed. Enter Output Test Mode (OTM). Refer to «ON-BOARD DIAGNOSTICS»(ref-232215-S30318432552006051600000) . Select the mode ALL ON. Push START to turn outputs on. Push STOP to turn outputs off. Does vehicle enter OTM? Yes : REMAIN in OTM. GO to G2. No : PRESS START. If vehicle does not enter OTM, refer to «INTRODUCTION - GASOLINE»(ref-229953) article for Escape (gasoline) and Mariner or «INTRODUCTION- HYBRID ESCAPE»(ref-235202) article for Escape (Hybrid).
  2. G2 CHECK ELECTRICAL SIGNAL OPERATION CAUTION: Do not try to remove the connector with a screwdriver, press and pull transaxle vehicle harness connector. Key in OFF position. Disconnect: Transaxle Connector. Use a mirror to inspect both ends of connector for damaged or pushed-out pins, corrosion, loose wires and missing or damaged seals. Key in ON position. Measure the voltage between pin 5 and pin 10 at the transaxle vehicle harness connector. Observe voltmeter and press START and STOP to cycle solenoid output on and off. Does the suspect solenoid output voltage change at least 0.5 volt? Yes : GO to G6 . No : GO to G3.
  3. G3 CHECK CONTINUITY OF SOLENOID SIGNAL AND VPWR HARNESS CIRCUIT Key in OFF position. Disconnect: PCM. Inspect for damaged or pushed-out pins, corrosion, loose wires and missing or damaged seals. Measure the resistance between the PCM pins C35 and C36 and transaxle vehicle harness connector pin 5. Measure the resistance between the PCM pin T23 and the transaxle vehicle harness connector pin 10. Is each resistance less than 5 ohms? Yes : GO to G4. No : REPAIR the circuit(s). RECONNECT all components. CLEAR the DTCs. RERUN On-Board Diagnostics tests.
  4. G4 CHECK HARNESS FOR SHORT TO POWER OR GROUND Disconnect: PCM. Disconnect: Transaxle Harness. Measure the resistance between the PCM pin T23 and the PCM pins C35 and C36. Measure the resistance between the PCM pin T23 and the PCM pins C47, C48 and C49. Measure the resistance between the PCM pin T23 and the PCM pin T41. Is each resistance greater than 10,000 ohms? Yes : GO to G5. No : REPAIR the circuit. RECONNECT all components. RERUN On-Board Diagnostics tests.
  5. G5 TRANSAXLE FUNCTIONAL TEST CAUTION: Do not pry on the connector. This will damage the connector and can result in a transaxle concern. Pull on the connector harness. NOTE: LED will turn GREEN when solenoid activates and turn OFF when deactivated. LED will turn RED if an activated solenoid/harness is shorted to battery positive. LED will remain OFF if an activated solenoid/harness is shorted to ground or no continuity (open circuit). Disconnect: Transaxle Harness Connector. Connect: Transmission Tester. Carry out all Static Testing - Engine OFF procedures for the shift solenoids. Does solenoid (LED green) activate? Yes : GO to G6. No : GO to G7 .
  6. G6 TRANSAXLE DRIVE TEST Connect: PCM. Disconnect: Transaxle Harness. Connect: Transmission Tester. Set Bench/Drive switch to DRIVE mode. Rotate gear selector switch to 1st gear position. Carry out the 3-2T/CCS Function Test outlined in the Transmission Tester manual. When the 3-2T/CCS switch is released, does engine braking occur and does the 3-2T/CCS engage (LED OFF)? Yes : INSTALL a new PCM. RERUN On-Board Diagnostics tests. No : GO to G7.
  7. G7 CHECK RESISTANCE OF SOLENOID Measure the resistance between VPWR jack and 3-2T/CCS jack on the Transmission Tester. Is the resistance between 3.75-5.92 ohms? Yes : GO to G8. No : INSTALL a new solenoid body assembly. REFER to «MAIN CONTROL VALVE BODY»(ref-232215-S06519159022006051600000) . CLEAR the DTCs. RERUN On-Board Diagnostics tests.
  8. G8 CHECK SOLENOID FOR SHORT TO GROUND Measure the resistance between jack BAT- (engine ground) and VPWR jack and 3-2T/CCS jack on the Transmission Tester. Is the resistance greater than 10,000 ohms? Yes : INSTALL a new solenoid body assembly. REFER to «MAIN CONTROL VALVE BODY»(ref-232215-S06519159022006051600000) . CLEAR the DTCs. RERUN On-Board Diagnostics tests. No : REFER to «DIAGNOSIS BY SYMPTOM»(ref-232215-S03959909232006051600000) .

PINPOINT TEST H: SOLENOID MECHANICAL FAILURE

Note. Repair all other DTCs before repairing the following DTCs: P1714, P1715.

  1. H1 ELECTRONICS DIAGNOSIS Disconnect the scan tool. Select PARK. Key in ON position. Carry out KOEO Test until continuous DTCs have been displayed. If P1714, P1715 DTCs are present, continue with this test. Are other DTCs present for TFT or shift solenoids? Yes : REPAIR the DTCs for TFT or shift solenoids first. CLEAR the DTCs and CARRY OUT Transmission Drive Cycle Test. RERUN Quick Test. No : INSTALL a new solenoid and/or body. REFER to «MAIN CONTROL VALVE BODY»(ref-232215-S06519159022006051600000) . GO to H2.
  2. H2 TRANSAXLE DRIVE CYCLE TEST Carry out Transaxle Drive Test. Refer to «TRANSAXLE DRIVE CYCLE TEST»(ref-232215-S18818531092006051600000) . Does the vehicle upshift and downshift OK? Yes : GO to H3. No : REFER to «DIAGNOSIS BY SYMPTOM»(ref-232215-S03959909232006051600000) to diagnose shift concerns.
  3. H3 RETRIEVE DTCs Connect the scan tool. Select PARK. Key in ON position. Carry out KOEO Test until continuous DTCs have been displayed. Are DTCs P1714, P1715 still present? Yes : INSTALL a new PCM. ROAD TEST and RERUN Quick Test. No : Testing completed. If a concern still exists. REFER to «DIAGNOSIS BY SYMPTOM»(ref-232215-S03959909232006051600000) .

Line Pressure Test

CAUTIONCarry out Line Pressure Test before carrying out Stall Speed Test. If line pressure is low at stall, do not carry out stall test or further transaxle damage can occur. Do not maintain WOT in any gear range for more than 5 seconds.
CAUTIONThe Transmission Tester must be removed from the transaxle and the vehicle harness connected to verify these pressures.

The Line Pressure Test verifies that the line pressure is within specifications.

Scheme 64

Scheme 64
Scheme 64
  1. Connect pressure gauge to line pressure tap.
  2. Start engine and check line pressures. Refer to following the «LINE PRESSURE CHART»(ref-232215-S13130719782006051600000) to determine if line pressure is within specifications.
  3. If line pressure is not within specifications, carry out on-board diagnostics and pinpoint test, air pressure check and repair main control system or pump as required.

Line Pressure Diagnosis

If the line pressure is low at idle in all ranges check the following items

  1. Low fluid level
  2. Restricted inlet filter
  3. Loose main body
  4. Solenoid body or accumulator body to case bolts
  5. Excessive leakage in pump
  6. Case
  7. Control bodies
  8. Sticking main regulator valve or damaged inlet tube seal on inlet filter
  9. Damaged gaskets or separator plate

If the line pressure is high at idle in all ranges then check the following items

  1. Main regular valve
  2. Solenoid body and wiring harness
  3. Run Quick Test referred to in electrical diagnosis in this article

Stall Speed Test

The Stall Speed Test checks the operation of the following items

  1. Torque converter one-way clutch
  2. Forward clutch
  3. Low/reverse one-way clutch
  4. Reverse clutch
  5. Forward one-way clutch
  6. Engine driveability concerns
  1. Connect a tachometer to the engine.
  2. Press accelerator pedal to floor (WOT) in each range. Record rpm reached in each range. Stall speeds should be in appropriate range.

Stall Speed Diagnosis Chart

RangePossible Source
D, 2, 1Forward Clutch Forward One-Way Clutch Low One-Way Clutch
RReverse Clutch Low/Reverse Clutch

STALL SPEED DIAGNOSIS CHART

Test Procedures

Carry out the following procedures

  1. Drain the transaxle. Remove main control cover.
  2. Remove the main control as an assembly with the solenoid body assembly.
  3. The inoperative clutches can be located by applying air pressure into the appropriate clutch port. Refer to «AIR PRESSURE TEST»(ref-232215-S17778020022006051600000) Port Locations diagram.
  4. Install the transmission test plate using 6 bolts. Tighten to 12 Nm (9 lb-ft).
  5. Apply air pressure 275 kPa (40 psi) to the appropriate clutch port (refer to «AIR PRESSURE TEST PORT»(ref-232215-S17778020022006051600000) Locations diagram). A dull thud may be heard, or movement felt when the clutch piston is applied. If clutch seals or check balls are leaking, a hissing may be heard.

Air Pressure Test Results

If the servos do not operate, disassemble, clean and inspect them to locate the source of the concern.

If air pressure applied to the clutch passages fails to operate a clutch or operates clutches simultaneously, inspect the fluid passages in the case.

If air pressure applied to the accumulator fails to operate an accumulator, remove and inspect case passages and piston.

Leakage Inspection

SPECIAL TOOLS DESCRIPTION 100W/12 Volt DC UV Lamp 164-R0751

Leakage at the main control cover gasket often can be stopped by tightening the main control cover bolts to 16 Nm (12 lb-ft). If necessary, install a new main control cover gasket.

Check the fluid filler tube connection at the transaxle case. If leakage is found, install a new fluid filler tube grommet.

Check the cooler lines and fittings between the transaxle and the cooler in the radiator for looseness, wear or damage. If leakage cannot be stopped by tightening a tube nut, install new parts. When fluid is found leaking between the case and the fluid tube connector, check for a missing or damaged O-ring, then tighten the fitting to maximum specification. Do not try to stop the fluid leak by increasing the torque beyond specification. This can cause damage to the case threads. If the leak continues, install a new fluid tube connector and tighten to specification. The same procedure should be followed for fluid leaks between the radiator and the fluid tube connector.

Check the engine coolant in the radiator. If transmission fluid is present in the coolant, the cooler in the radiator is probably leaking.

The cooler can be further checked for leaks by disconnecting the fluid cooler tubes for the fluid tube connectors and applying no more than 345 kPa (50 psi) air pressure to the fluid tube connectors. Remove the radiator cap to relieve the pressure buildup at the exterior of the fluid cooler tank. If the cooler is leaking or will not hold pressure, install a new cooler.

If leakage is found at the manual control lever, install a new manual control lever seal.

Check for fluid leaking from the differential seal. Leakage can result from a damaged seal, missing garter spring or worn front wheel driveshaft and joint. Install a new seal assembly or front wheel driveshaft and joint as necessary.

Check for fluid leaks in the pump to case interface. A leak may be due to a rolled pump lip seal or a damaged seal. Repair the pump assembly.

Leak Check Test

The following procedures should be used to determine the cause of the leakage before repair is made.

  1. Remove the fluid level indicator and note the color of the fluid. Original factory fill fluid is dyed red to aid in determining if leakage is from the engine or transaxle. Unless a considerable amount of makeup fluid has been added or the fluid has been changed, the red color should assist in pinpointing the leak.
  2. Remove the dust cover. Clean off any fluid from the top and bottom of the converter housing, front of the case and rear face of the engine and oil pan. Clean the torque converter area by washing with a suitable nonflammable solvent and blow dry with compressed air.
  3. Wash out the converter housing and the front of the flexplate. The converter housing can be washed out using cleaning solvent and a squirt-type oil can. Blow dry all washed areas with compressed air.
  4. Start and run the engine until the transaxle reaches normal operating temperature. Observe the back of the block and top of the converter housing for evidence of fluid leakage. Raise the vehicle on a hoist. Run the engine at fast idle, then at engine idle, occasionally shifting to the DRIVE and REVERSE ranges to increase pressure within the transaxle. Observe the front of the flexplate, back of the block (in as far as possible) and inside the converter housing and front of the case. Run the engine until fluid leakage is evident and the source of leakage can be determined.

Leak Check Test With Black Light

Oil-soluble aniline or fluorescent dyes premixed at the rate of 2.5 ml (1/2 teaspoon) of dye powder to 0.23 liter (1/2 pint) of transmission fluid have proven helpful in locating the source of fluid leakage. Such dyes can be used to determine whether an engine oil or transmission fluid leak is present, or if the fluid in the transmission fluid cooler leaks into the engine coolant system. A black light must be used with the fluorescent dye solution.

Transmission Fluid Cooler Flow Test

Note. The transaxle linkage adjustment, fluid level and line pressure must be within specification before carrying out this test. Refer to AUTOMATIC TRANSAXLE-TRANSMISSION EXTERNAL CONTROLS - CD4E for transaxle linkage adjustment procedure. For transmission fluid level checking procedures, refer to PRELIMINARY INSPECTION . For transaxle line pressure testing, refer to SPECIAL TESTING PROCEDURES .

  1. Check the transmission fluid level and fill as necessary.
  2. Remove the transmission fluid level indicator from fluid filler tube and install funnel in fluid filler tube.
  3. With the vehicle in NEUTRAL, position it on a hoist. Refer to «JACKING AND LIFTING»(ref-232183) . Inspect the transmission fluid cooler lines for damage. Install new transmission fluid cooler lines as needed.
  4. Disconnect cooler return line (rear line) by separating the tubing from the cooler line rubber hose.
  5. Plug the cooler line to avoid transmission fluid loss.
  6. Connect one end of a hose to the cooler return line hose and route the other end of the hose up to a point where it can be inserted into the funnel at the fluid filler tube.
  7. Start the engine and run at idle with transaxle in NEUTRAL range until the automatic transmission fluid is warm. Temperature is important to the flow rate measurement. Carry out the Fluid Cooler Flow Test. Option 1: Once fluid flow no longer has air bubbles in it, remove the rubber hose from the funnel and insert it into liter container. After 15 seconds, install the hose into the funnel and measure the amount of automatic transmission fluid in the container. The rate of flow should be approximately 28 - 34 oz. (0.83 - 1.0 liter) in 15 seconds. Option 2: Once fluid flow no longer has air bubbles in it, remove the rubber hose from the funnel and insert it into a liter container. As soon as one liter (1.06 quart) is dispensed into the container, install the hose into the funnel. One liter of automatic transmission fluid should flow through the cooling system in approximately 15 - 17 seconds.
  8. Once adequate flow is determined, shut off the engine, remove the extension hose and reassemble the cooler line with the constant tension clamp.
  9. If flow is not adequate, stop the engine. Disconnect the hose from the cooler return line and connect it to the converter-out line. If flow is now liberal, carry out backflushing and cleaning procedure. Refer to «TRANSMISSION FLUID COOLER - BACKFLUSHING AND CLEANING»(ref-232215-S11478393322006051600000) . Refer to transaxle fluid cooler diagnosis in «TRANSMISSION FLUID COOLER»(ref-232215-S00155688862006051600000) . If flow is still not liberal, repair the pump or converter.
  10. Check the transmission fluid level and adjust as required.

Diagnosis by Symptom Chart Directions

The Diagnosis by Symptom charts give the technician diagnostic information, direction and possible components of concern, using a symptom as a starting point.

The Diagnosis by Symptom charts are divided into 2 categories: electrical routines, indicated by 200 series numbers, and hydraulic/mechanical routines, indicated by 300 series numbers. The electrical routines list the possible electrical components that could cause or contribute to the symptom described. The hydraulic/mechanical routines list the possible hydraulic or mechanical components that could cause or contribute to the symptom described.

Note. The powertrain control module (PCM) has an adaptive learn strategy to electronically control the transaxle. The adaptive learn strategy will automatically adjust the shift feel to the driver demands. The first few hundred miles of operation the transaxle may have abrupt shifts, this is a normal operation and will correct itself. If the battery has been disconnected for longer than 20 minutes the shift tables will reset and need to be relearned. Upshifting is controlled by the PCM. The PCM receives inputs from various engine and vehicle sensors along with driver demands to control shift scheduling, shift feel and torque converter clutch operation.

  1. Use the index and select the symptom/concern that best describes the condition.
  2. Turn to the routine indicated in the index.
  3. Always begin diagnosis of a symptom by using the following: Preliminary inspections Verification of condition Fluid level check Other test procedures as directed
  4. Begin with the electrical routine if indicated. Follow the reference or action required statements. Always carry out the On-Board Diagnostic Tests as required. Never skip steps. Repair as required. If the concern is still present after electrical diagnosis, proceed to the hydraulic/mechanical routine listed.
  5. The hydraulic/mechanical routines list possible hydraulic or mechanical components that could cause the concern. These components are listed in the removal sequence and by "most likely." All components listed must be inspected to verify correct servicing is carried out.

Diagnosis by Symptom Index

TitleRoutines
Electrical (1)Hydraulic/Mechanical
Engagement Concerns
No Forward Only201301
No Reverse Only202302
Harsh Reverse or Forward203303
Delayed/Soft Reverse or Forward205305
No Forward and No Reverse207307
Shift Concerns
Some or All Shifts Missing210310
Shift Timing - Early/Late211311
Timing - Erratic/Hunting212312
Feel - Soft/Slipping213313
Feel - Harsh214314
No 1st Gear, Engages in Higher Gear ("D" Position)215315
No Manual 1st Gear (First in "D", OK)216316
Torque Converter Operation Concerns
No Apply240340
Always Applied/May Stall Engine241341
Cycling Shudder Chatter242342
Other Shift Concerns
Shift Lever Effort High251351
External Leaks252352
Vehicle Driveability Concerns253353
Noise/Vibration - Forward/Reverse254354
Engine will Not Crank255355
No PARK Range256356
Transaxle Overheating257357
No Engine Braking in Manual 1st Position258358
No Engine Braking in DRIVE (TCS ON) or Manual 2nd Position259359
Vehicle Movement with Gear Selector in the "N" Position262362
(1) Carry out electrical routines first.
(1)Carry out electrical routines first.

DIAGNOSIS BY SYMPTOM INDEX

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