INSPECTION PROCEDURE 11: Early or Late Shifting Some Gears: Diagnosis

WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.

Required Special Tool:

MB991502: Scan Tool (MUT-II)

STEP 1. Using scan tool MB991502, check actuator test item 14: INVECS-II Cancel Command.
CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
1. Connect scan tool MB991502 to the data link connector.
2. Start the engine.
3. Set scan tool MB991502 to actuator test mode for item 14: INVECS-II Cancel Command.
  - Drive the vehicle and confirm the gear shifting correspond to the standard shift line of the shift pattern diagram. Refer to GENERAL DESCRIPTION .
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Does the gear shifting correspond to the standard shift line of the shift pattern diagram?

YES : The symptom is due to characteristics of the INVECS-II system, but is not abnormal.

NO: Go to Step 2.

Fig 1: Connecting Scan Tool To Data Link Connector
Courtesy of CHRYSLER CORP.
STEP 2. Check the shift points.
Q: Are the shift points early or late only when transmission fluid is -29°C (84°F) or less (early), or 125°C (257°F) or more (late)?

YES : The symptom is due to characteristics of the INVECS-II system, but is not abnormal.

NO: Go to Step 3.
STEP 3. Disassemble and clean the valve body.
Check the O-ring installation bolts for looseness and the valve body for damage. Repair or replace the faulty parts. Refer to VALVE BODY .

Replace the valve body assembly if the damages are thought to be irreparable. Then check the symptom.

Q: Is the symptom eliminated?

YES : The procedure is complete.

NO: Go to Step 4.

Fig 2: Identifying Valve Body Assembly
Courtesy of CHRYSLER CORP.
STEP 4. Replace the PCM.
Q: Is the symptom eliminated?

YES : The procedure is complete.

NO: Start over at Step 1.