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Test TT - AXOD Transaxle

NOTE: Perform this test only when KEY ON/ENGINE OFF SELF-TEST (KOEO) service codes 62, 67, and 89 are present; when KEY ON/ENGINE RUNNING (KOER) SELF-TEST service code 62 is displayed; or when CONTINUOUS SELF-TEST service codes 29, 39, 57, 59, and 69 are displayed. Ensure that all components are connected before performing test. Perform AXOD DRIVE CYCLE TEST on a slight upgrade or flat terrain.

AXOD Drive Cycle Test. Record and zero service codes. Warm engine to operating temperature. With transaxle in "D" range, lightly accelerate from a stop to 40 MPH to allow transaxle to shift into 3rd gear. Hold speed and throttle opening steady for a minimum of 15 seconds (30 seconds above 4000 feet altitude).

Shift transaxle into overdrive and accelerate lightly from 40 to 50 MPH to allow transaxle to shift into 4th gear. Hold speed and throttle opening steady for a minimum of 15 seconds.

With transaxle in 4th gear, throttle open and speed steady, lightly apply and release brakes (enough to light brake lamps). Hold speed and throttle opening steady for an additional 15 seconds minimum.

Brake to a stop and remain stopped for a minimum of 20 seconds with transaxle in overdrive. Perform QUICK TEST  and record service codes.

  1. Continuous Code 29 Displayed. Perform AXOD DRIVE CYCLE TEST and return to this step. If continuous code 29 is not displayed, fault cannot be duplicated at this time. If any other codes are present, return to QUICK TEST  for instructions. If none, test is complete. If continuous code 29 is displayed, go to next step.
  2. Turn key off and wait 10 seconds. Disconnect ECA 60-pin connector. Inspect for and repair any damaged wiring. Install breakout box, leaving ECA and Vehicle Speed Sensor (VSS) disconnected. Set DVOM on 200-ohm scale. Measure resistance between test pin 3 and VSS + circuit at harness connector. Measure resistance between test pin 6 and VSS - circuit at harness connector. If both readings are 5 ohms or more, repair open(s) in VSS harness, then repeat step 1). If both readings are 5 ohms or less, go to next step.
  3. With key off, ECA and VSS disconnected, set DVOM on 200,000-ohm scale. Measure resistance between test pin 3 and test pins 37, 40, and 6. Then measure resistance between test pin 6 and test pins 37 and 40. If all readings are less than 1000 ohms, repair short(s) in VSS harness, then repeat step 1). If all readings are more than 1000 ohms, go to next step.
  4. Substitute original VSS with a good known VSS. With ECA and VSS connected, perform AXOD DRIVE CYCLE TEST and return to this step. If continuous code 29 is displayed, replace ECA then repeat step 1). If continuous code 29 is not displayed, replace original VSS then repeat QUICK TEST .
  5. Continuous Code 69 Displayed. Perform AXOD DRIVE CYCLE TEST and return to this step. If continuous code 69 is not displayed, fault cannot be duplicated at this time. If any other codes are present, return to QUICK TEST  for instructions. If none, test is complete. If continuous code 69 is displayed, go to next step.
  6. Turn key off and wait 10 seconds. Disconnect ECA 60-pin connector. Inspect for and repair any damaged wiring. Install breakout box, leaving ECA and AXOD harness disconnected. Set DVOM on 200-ohm scale. Measure resistance between test pin 19 and THS 3/2 circuit at AXOD harness connector. If reading is more than 5 ohms, repair open in THS 3/2 circuit then repeat step 5). If reading is 5 ohms or less, go to next step.
  7. With key off, breakout box installed, and ECA and AXOD harness disconnected, set DVOM on 200,000-ohm scale. Measure resistance between test pin 19 and test pin 37. If reading is less than 10,000 ohms, repair short to power in THS 3/2 circuit, then repeat step 5). If reading is more than 10,000 ohms, go to next step.
  8. With key off and breakout box installed, connect ECA and AXOD harness. Install a jumper wire between test pin 19 and 40. Perform KEY ON/ENGINE OFF SELF-TEST. If code 62 is displayed, remove jumper wire and go to AXOD TRANSAXLE ELECTRICAL SYSTEM DIAGNOSIS . If code 62 is not displayed, remove jumper wire, replace ECA, and then repeat step 5).
  9. Continuous Code 59 Displayed. Perform AXOD DRIVE CYCLE TEST and return to this step. If continuous code 59 is not displayed, fault cannot be duplicated at this time. If any other codes are present, return to QUICK TEST  for instructions. If none, test is complete. If continuous code 59 is displayed, go to next step.
  10. Turn key off and wait 10 seconds. Disconnect ECA 60-pin connector. Inspect for and repair any damaged wiring. Install breakout box, leaving ECA and AXOD harness disconnected. Set DVOM on 200-ohm scale. Measure resistance between test pin 18 and THS 4/3 circuit at AXOD harness connector. If reading is more than 5 ohms, repair open in THS 4/3 harness, then repeat step 9). If reading is 5 ohms or less, go to next step.
  11. With key off, breakout box installed, and ECA and AXOD harness disconnected, set DVOM on 200,000-ohm scale. Measure resistance between pin 18 and test pin 37. If reading is less than 10,000 ohms, repair short to power in THS 4/3 circuit, then repeat step 9). If reading is higher than 10,000 ohms, go to next step.
  12. With key off and breakout box installed, connect ECA and AXOD harness. Install a jumper wire between test pin 18 and 40. Perform KEY ON/ENGINE OFF SELF-TEST. If code 62 is displayed, remove jumper wire and go to AXOD TRANSAXLE ELECTRICAL SYSTEM DIAGNOSIS . If code 62 is not displayed, remove jumper wire, replace ECA, and then repeat step 9).
  13. Continuous Code 39 Displayed. Perform AXOD DRIVE CYCLE TEST then return to this step. If continuous code 59 is also present, go directly to step 9). If continuous code 39 is displayed, go to AXOD TRANSAXLE ELECTRICAL SYSTEM DIAGNOSIS . If continuous code 39 is not displayed, fault cannot be duplicated at this time. If any other codes are present, return to QUICK TEST  for instructions. If none, test is completed.
  14. Continuous Code 57 Displayed. Perform AXOD DRIVE CYCLE TEST and then return to this step. If continuous code 57 is not displayed, fault cannot be duplicated at this time. If any other codes are present, return to QUICK TEST  for instructions. If none, test is completed. If continuous code 57 is displayed, go to next step.
  15. Turn key off and wait 10 seconds. Disconnect ECA 60-pin connector. Inspect for and repair any damaged wiring. Install breakout box, leaving ECA and AXOD harness disconnected. Set DVOM on 200-ohm scale. Measure resistance between test pin 30 and NPS circuit at AXOD harness connector. If reading is more than 5 ohms, repair open in NPS circuit, then repeat step 14). If reading is 5 ohms or less, go to AXOD TRANSAXLE ELECTRICAL SYSTEM DIAGNOSIS .
  16. Code 89 Displayed. Turn key off and wait 10 seconds. Disconnect ECA 60-pin connector. Inspect for and repair any damaged wiring. Install breakout box, leaving ECA and AXOD harness disconnected. Set DVOM on 200-ohm scale. Measure resistance between test pin 37 and VPWR circuit at AXOD harness connector. If reading is more than 5 ohms, repair open in VPWR circuit then repeat QUICK TEST . If reading is 5 ohms or less, go to next step.
  17. With key off, breakout box installed, and ECA and AXOD harness disconnected, set DVOM on 200-ohm scale. Measure resistance between test pin 53 and LUS circuit at AXOD harness connector. If reading is more than 5 ohms, repair open in LUS circuit then repeat QUICK TEST . If reading is 5 ohms or less, go to next step.
  18. With key off, breakout box installed, and ECA and AXOD harness disconnected, set DVOM on 200,000-ohm scale. Measure resistance between test pin 53 and test pins 37 and 40. If both readings are less than 10,000 ohms, repair shorts in LUS harness. Repeat QUICK TEST . If code 89 is still displayed, replace ECA and repeat QUICK TEST . If both readings are higher than 10,000 ohms, go to next step.
  19. With key off, breakout box installed, and ECA disconnected, connect AXOD harness. Set DVOM on 200,000-ohm scale. Measure resistance between test pin 53 and test pin 57. If resistance is between 20 and 40 ohms, replace ECA and repeat QUICK TEST . If resistance is not between 20 and 40 ohms, go to AXOD TRANSAXLE ELECTRICAL SYSTEM DIAGNOSIS .
  20. Code 62 Displayed. Perform ENGINE RUNNING SELF-TEST and record codes. If code 62 is displayed, fault is in THS 4/3 circuit. Go to next step. If code 62 is not displayed, fault is in THS 3/2 circuit. Go to next step.
  21. Turn key off and disconnect AXOD harness. Perform KEY ON/ENGINE OFF SELF-TEST. If code 62 is not displayed, go to AXOD TRANSAXLE ELECTRICAL SYSTEM DIAGNOSIS . If code 62 is displayed, go to next step.
  22. Turn key off, install breakout box, leaving ECA and AXOD harness disconnected. Set DVOM on 200,000-ohm scale. Measure resistance between test pin 18 and test pins 40 and 60. Also measure resistance between test pin 19 and test pins 40 and 60. If all readings are less than 10,000 ohms, repair short(s) to ground. Repeat QUICK TEST . If all readings are higher than 10,000 ohms, replace ECA and repeat QUICK TEST .
  23. Verify that code 62 is present in ENGINE RUNNING SELF-TEST. If code 62 is displayed, go to AXOD TRANSAXLE ELECTRICAL SYSTEM DIAGNOSIS . If code is not displayed, fault cannot be duplicated at this time. If any other codes are present, return to QUICK TEST  for instructions. If none, test is completed.
  24. Code 67 Displayed. Turn key on, leaving engine off. Disconnect ECA 60-pin connector. Inspect for and repair any damaged wiring. Install breakout box and connect ECA to box. Set DVOM on 20 volt scale. Measure voltage between test pin 30 and 46. If reading is more than 4.0-volts, go to TEST M - NEUTRAL-A/C SWITCH , step 4). If reading is less than 4.0-volts, go to next step.
  25. With key off, breakout box installed, and ECA and AXOD harness disconnected, set DVOM on 200,000-ohm scale. Measure resistance between test pin 30 and test pins 40 and 60. If all readings are less than 10,000 ohms, repair short to ground in NPS circuit. Repeat QUICK TEST . If all readings are higher than 10,000 ohms, go to next step.
  26. With key off and breakout box installed, connect ECA. Leave AXOD harness disconnected. Perform KEY ON/ENGINE OFF SELF-TEST. If code 67 is displayed, replace ECA and repeat QUICK TEST . If code 67 is not displayed, go to AXOD TRANSAXLE ELECTRICAL SYSTEM DIAGNOSIS .
Fig 1: AXOD Transaxle Circuits
G6069
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