[23A] AUTOMATIC TRANSMISSION (FF) - - TROUBLESHOOTING <A/T> - DIAGNOSTIC TROUBLE CODE PROCEDURES <4G63, 4G64> - Code No.35 Reduction Solenoid Valve System <5A/T> | PRINT PAGE / INDEX / PRIOR / NEXT

Code No.35 Reduction Solenoid Valve System <5A/T>
OPERATION Solenoid valve closes or opens according to the signals from the engine-A/T-ECU. The engine-A/T-ECU energizes or deenergizes solenoid valve, based on input signals such as throttle position sensor opening angle, inhibitor switch, etc.
DIAGNOSIS CODE SET CONDITION If the drive terminal voltage of the reduction solenoid valve is 3.0 V or less, it is judged that there is a short-circuit or open circuit in the reduction solenoid valve, and the corresponding code is output. If diagnosis code 35 is output 4 times, the transmission is fixed in 3rd as a fail-safe measure.
PROBABLE CAUSES Malfunction of reduction solenoid valve Damaged harness wires and connectors Malfunction of the engine-A/T-ECU
DIAGNOSIS PROCEDURE
STEP 1. Read diagnosis code by using the MUT-II/III. Q: Are diagnosis code 31 and 36 set? YES: Go to Step 9. NO: Go to Step 2.
STEP 2. MUT-II/III actuator test Item 05: Reduction solenoid valve OK: Operating sound can be heard. Q: Is the check result normal? YES: Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction .) NO: Go to Step 3.
STEP 3. Connector check: B-21 A/T control solenoid valve assembly connector Check for the contact with terminals. Q: Is the check result normal? YES: Go to Step 4. NO: Repair the defective connector.
STEP 4. Measure the resistance at A/T control solenoid valve assembly connector B-21. Disconnect the connector, and measure the resistance between terminal No.8 and No.10 at the solenoid valve side. OK: 2.7 - 3.4 Ω (A/T fluid temperature 20°C) Q: Is the check result normal? YES: Go to Step 5. NO: Replace the reduction solenoid valve. (Refer to GROUP 23C - Valve Body ).
STEP 5. Measure the voltage at engine-A/T-ECU connector C-109. Connect A/T control solenoid valve assembly connector B-21. Turn the ignition switch to the ON position. Measure the voltage between engine-A/T-ECU connector C-109 terminal No.119 and earth. OK: Battery positive voltage Q: Is the check result normal? YES: Go to Step 8. NO: Go to Step 6.
STEP 6. Connector check: C-109 engine-A/T-ECU connector Check for the contact with terminals. Q: Is the check result normal? YES: Go to Step 7. NO: Repair the defective connector.
STEP 7. Check the harness between A/T control solenoid valve assembly connector B-21 terminal No.8 and engine-A/T-ECU connector C-109 terminal No.119. Check the output line for short or open circuit. Q: Is the check result normal? YES: Go to Step 8. NO: Repair the wiring harness.
STEP 8. MUT-II/III actuator test Item 05: Reduction solenoid valve OK: Operating sound can be heard. Q: Is the check result normal? YES: Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction .) NO: Replace the engine-A/T-ECU.
STEP 9. Connector check: B-21 A/T control solenoid valve assembly connector Check for the contact with terminals. Q: Is the check result normal? YES: Go to Step 10. NO: Repair the defective connector.
STEP 10. Measure the resistance at A/T control solenoid valve assembly connector B-21. Disconnect the connector, and measure the resistance between terminal No.8 and No.10 at the solenoid valve side. OK: 2.7 - 3.4 Ω (A/T fluid temperature 20°C) Q: Is the check result normal? YES: Go to Step 11. NO: Replace the solenoid valve harness. (Refer to GROUP 23C - Valve Body .)
STEP 11. Connector check: B-16X A/T control relay connector Check for the contact with terminals. Q: Is the check result normal? YES: Go to Step 12. NO: Repair the defective connector.
STEP 12. Check the harness between A/T control solenoid valve assembly connector B-21 terminal No.10 and A/T control relay connector B-31X terminal No.1. Check the power supply line for short or open circuit. Q: Is the check result normal? YES: Go to Step 8. NO: Repair the wiring harness.

[23A] AUTOMATIC TRANSMISSION (FF) - - TROUBLESHOOTING <A/T> - DIAGNOSTIC TROUBLE CODE PROCEDURES <4G63, 4G64> - Code No.35 Reduction Solenoid Valve System <5A/T> | PRINT PAGE / INDEX / PRIOR / NEXT

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