Before Pinpoint Tests

DESCRIPTION
The following items must be checked prior to beginning the diagnostic procedures.

KNOW/UNDERSTAND THE CONCERN
In order to properly diagnose a concern you must first understand the customer complaint or condition. Customer contact may be required in order for the technician to begin to verify the concern. You must understand the conditions as to when the concern occurs. For example:
- Hot or cold vehicle temperature.
- Hot or cold ambient temperature.
- Vehicle driving conditions. After understanding when and how the concern occurs, proceed to verifying the concern.

VERIFICATION OF CONDITION
This section provides information which must be used in both determining the actual cause of customer concerns and performing the appropriate service procedures.

Required Equipment

CAUTION: To properly diagnose an AX4N transaxle, the Rotunda Transmission Tester 007-00130 or equivalent must have been updated for AX4N compatibility. The Rotunda AX4N Transmission Tester Update (007-00105) includes internal software and related components and a new cable and overlay. Inspect your tester for the "AX4N Compatible" label located near the tester's cable connector. If the label is missing, do not use the tester to diagnose the AX4N transaxle. Contact Rotunda Equipment or supplier as listed in instruction manual for information on how to have the tester updated.

- Rotunda Transmission Tester 007-00130
- Rotunda AX4N Transmission Tester Update 007-00105
- Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent
- Rotunda 73 Digital Multimeter 105-R0051 or equivalent
- Rotunda Transmission Range (TR) Sensor Cable (MLP-B Cable) 007-00127 or (TRS-E Cable) 007-00111 or Rotunda AX4N Cable and Overlay 007-00117 or equivalents, used with Transmission Tester 007-00130
- Rotunda 104-Pin Breakout Box 014-00950 or equivalent
- Transmission Range (TR) Sensor (MLPS) Alignment Tool T92P-70010-AH

Determine Customer Concern
- Hot or cold vehicle operating temperature
- Hot or cold ambient temperatures
- Type of terrain
- Vehicle loaded/unloaded
- City/highway driving
- Upshift/Downshift/Coasting
- Engagement
- Noise/Vibration

NOTE:
- If noise/vibration, check for dependencies either rpm dependent, vehicle speed dependent, shift dependent, gear dependent, range dependent or temperature dependent.
- Some AX4N transaxle conditions may cause engine concerns. The torque converter clutch not disengaging will stall the engine.

Check Fluid Level and Condition
Check fluid level and condition and correct as required. Testing and Inspection