Vehicle Does Not Decelerate By Engine Brake

Vehicle Does Not Decelerate By Engine Brake

SYMPTOM: No engine brake is applied when the gear is shifted from the 22 to 11.

DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSIS RESULTS
Perform self-diagnosis.

Do the self-diagnosis results indicate PNP switch, ATF pressure switch 5?
YES >> Check the malfunctioning system. Refer to "DTC P0705 PARK/NEUTRAL POSITION SWITCH" P0705, "DTC P1845 ATF PRESSURE SWITCH 5" P1845.
NO >> GO TO 2.

2. CHECK 1ST POSITION SWITCH CIRCUIT
With CONSULT-II
1. Turn ignition switch "ON".





2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.





3. Read out "1 POSITION SW" moving switch selector lever to each Position.

Without CONSULT-II





1. Turn ignition switch "ON". (Do not start engine)





2. Check voltage between A/T device harness connector terminal and ground.

OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.

3. CHECK A/T FLUID LEVEL





Check the A/T fluid level.

OK or NG
OK >> GO TO 4.
NG >> Refill ATF.

4. CHECK CONTROL CABLE





Check the control cable.
OK or NG
OK >> GO TO 5.

NG >> Adjust control cable.

5. CHECK A/T FLUID CONDITION





1. Remove oil pan.
2. Check A/T fluid condition.

OK or NG
OK >> GO TO 6.
NG >> GO TO 9.

6. DETECT MALFUNCTIONING ITEM
^ Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to "Symptom Chart" (Symptom No.53) Symptom Chart.

OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.

7. CHECK SYMPTOM
Check again.

OK or NG
OK >> INSPECTION END
NG >> GO TO 8.

8. PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to AT-82 "TCM Input/Output Signal Reference Values" Pinout Values and Diagnostic Parameters.
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness connector.

OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.

9. DETECT MALFUNCTIONING ITEM
^ Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to "Symptom Chart" (Symptom No.53) Symptom Chart.

OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.