How to Proceed With Troubleshooting

A750F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
- The ECM is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN communication system.
- *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP
NEXT -- Continue to next step.
2. CUSTOMER PROBLEM ANALYSIS
NEXT -- Continue to next step.
3. INSPECT BATTERY VOLTAGE
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding.
NEXT -- Continue to next step.
4. CONNECT TECHSTREAM TO DLC3*
NEXT -- Continue to next step.
5. CHECK AND CLEAR DTCS AND FREEZE FRAME DATA*
(a) Refer to the DTC Check / Clear DTC Check / Clear.
NEXT -- Continue to next step.
6. VISUAL INSPECTION
NEXT -- Continue to next step.
7. SETTING CHECK MODE DIAGNOSIS*
(a) Refer to the Check Mode Procedure Check Mode Procedure.
NEXT -- Continue to next step.
8. PROBLEM SYMPTOM CONFIRMATION
(a) Refer to the Road Test Road Test.

Result





B -- GO TO STEP 10
A -- Continue to next step.
9. SYMPTOM SIMULATION
(a) Refer to the Electronic Circuit Inspection Procedure Electronic Circuit Inspection Procedure.
NEXT -- Continue to next step.
10. DTC CHECK*
(a) Refer to the DTC Check / Clear DTC Check / Clear.

Result





B -- GO TO STEP 19
A -- Continue to next step.
11. BASIC INSPECTION
(a) Refer to the Automatic Transmission Fluid Procedures.
(b) Refer to the Park/Neutral Position Switch On-Vehicle Inspection.
(c) Refer to the Shift Lever Assembly.

- for Column Shift Type, refer to the following procedures On-Vehicle Inspection
- for Floor Shift Type, refer to the following procedures On-Vehicle Inspection

NG -- GO TO STEP 22
OK -- Continue to next step.
12. MECHANICAL SYSTEM TESTS
(a) Refer to the Mechanical System Tests Mechanical System Tests.
NG -- GO TO STEP 18
OK -- Continue to next step.
13. HYDRAULIC TEST
(a) Refer to the Hydraulic Test Hydraulic Test.
NG -- GO TO STEP 18
OK -- Continue to next step.
14. MANUAL SHIFTING TEST
(a) Refer to the Manual Shifting Test Manual Shifting Test.
NG -- GO TO STEP 17
OK -- Continue to next step.
15. PROBLEM SYMPTOMS TABLE CHAPTER 1
(a) Refer to the Problem Symptoms Table Symptom Related Diagnostic Procedures.
NG -- GO TO STEP 20
OK -- Continue to next step.
16. PROBLEM SYMPTOMS TABLE CHAPTER 2
(a) Refer to the Problem Symptoms Table Symptom Related Diagnostic Procedures.
NG -- GO TO STEP 18
OK -- Continue to next step.
17. PROBLEM SYMPTOMS TABLE CHAPTER 3
(a) Refer to the Problem Symptoms Table Symptom Related Diagnostic Procedures.
NEXT -- Continue to next step.
18. PART INSPECTION
NG -- GO TO STEP 22
OK -- Continue to next step.
19. DTC CHART
(a) Refer to the Diagnostic Trouble Code Chart Automatic Transmission System - A750F.
NEXT -- Continue to next step.
20. CIRCUIT INSPECTION
NEXT -- Continue to next step.
21. IDENTIFICATION OF PROBLEM
NEXT -- Continue to next step.
22. REPAIR OR REPLACE
NEXT -- Continue to next step.
23. CONFIRMATION TEST
NEXT -- END