P0780

P0780 SHIFT





Description
The TCM detects the malfunction of low brake solenoid valve. This is not only caused by electrical malfunction
(circuits open or shorted) but also by mechanical malfunction such as control valve sticking, improper solenoid valve operation, etc.




DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE

CAUTION:
Always drive vehicle at a safe speed.
1.PRECONDITIONING
If "DTC CONFIRMATION PROCEDURE" is previously conducted, always turn ignition switch OFF and wait at least 10 seconds before performing the next test.
- GO TO 2.
2.CHECK DTC DETECTION
With CONSULT-III
1. Start the engine.
2. Select "SLCT LVR POSI", "ACCELE POSI" and "GEAR" in "Data Monitor" in "TRANSMISSION".
3. Drive vehicle and maintain the following conditions.

SLCT LVR POSI : D
ACCELE POSI : More than 1.0/8
GEAR : 3rd Arrow 4th

4. Perform "Self Diagnostic Results" in "TRANSMISSION".
With GST
Follow the procedure "With CONSULT-III".
Is "P0780" detected?
YES - Go to SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
Is the inspection result normal?
YES - GO TO 2.
NO - Repair or replace damaged parts.
2.DETECT MALFUNCTIONING ITEM
Disassemble the A/T assembly to check component parts. Disassembly.
NOTE:
Check the component parts, referring to "Possible cause" in "DTC DETECTION LOGIC". SEE Description SEE DTC Logic SEE Diagnosis Procedure, "DTC Logic".
Is the inspection result normal?
YES - Replace control valve & TCM. Removal And Installation.
NO - Repair or replace damaged parts.