Inspection Procedure 11
COMMENTIf some of the shift points are early or late when driving, the cause is probably a malfunction of the valve body, or it is due to the characteristics of the INVECS-II system,but is not an abnormality.
TROUBLESHOOTING HINTS
The most likely causes for this case:
- Malfunction of the valve body
DIAGNOSIS
Required Special Tool: MB991502: Scan Tool (MUT-II)
CAUTION: To prevent damage to scan tool MB991502, make sure the ignition switch is "OFF" before connecting or disconnecting the scan tool MB991502.
STEP 1. Using scan tool MB991502, INVECS-II CANCEL COMMAND item 14.
- Using scan tool MB991502, cancel INVECS-II.
- Does the gear shifting correspond to the standard shift line of the shift pattern diagram?
If no, go to Step 2.
If yes, the symptom is due to characteristics of the INVECS-II system, but is not abnormal.
STEP 2. Are the shift points early or late only when automatic transmission fluid is -29°C (84°F) or less, or 125° (257°F) or more?
If no, go to Step 3.
If yes, the symptom is due to characteristics of the INVECS-II system, but is not abnormal.
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.
If repair is not possible, replace the valve body assembly. Then check the symptom.
If the symptom is eliminated, diagnosis is complete.