Dtc P0751 Shift Solenoid Valve-A (#1) - Suzuki sq-416-420-625 Service Manual

DTC P0751 SHIFT SOLENOID VALVE-A (#1) PERFORMANCE OR STUCK OFF
DTC P0756 SHIFT SOLENOID VALVE-B (#2) PERFORMANCE OR STUCK OFF
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITION
While running in D range, gear change control from
PCM to A/T does not agree with actual A/T gear posi-
tion even though solenoid valve is electrically in good
condition.
(A/T gear position is calculated based on engine
speed signal and vehicle speed sensor signal.)
(2 driving cycles detection logic)
DTC CONFIRMATION PROCEDURE
WARNING:
D When performing a road test, select a place where there is no traffic or possibility of a traffic accident
and be very careful during testing to avoid occurrence of an accident.
D Road test should be carried out with 2 persons, a driver and a tester, on a level road.
1) Connect scan tool to DLC with ignition switch OFF.
2) Clear DTC, pending DTC and freeze frame data in PCM memory by using scan tool and check fuel level meter
indication is 1/4 or more.
3) Start engine, warm it up to normal operating temperature and shift transfer lever to "2H" or "4H" range.
4) Increase vehicle speed with D range, and check that gear position changes from 1st to 2nd, 3rd and 4th in that
order as vehicle speed increases, referring to "Gear Shift Diagram" in this section.
5) Stop vehicle and check pending DTC and DTC by using scan tool.
TROUBLESHOOTING
STEP
1 Was "A/T DIAG. FLOW TABLE" performed?
2 Shift solenoid valve-A or -B operation check:
1) Check shift solenoid valve-A or -B for operation
referring to "Solenoid Valves Operation Check"
section.
Is it in good condition?
3 Valve body check:
1) Check valve body and its passage referring to
"Unit Repair" section.
Are they in good condition?
ACTION
AUTOMATIC TRANSMISSION (4 A / T) 7B1-49
TROUBLE AREA
DTC P0751:
D Shift solenoid valve-A stuck or leakage.
D 2-3 shift valve stuck.
D Valve body fluid passage clogged.
D Mechanical malfunction in transmission.
(Direct clutch malfunction)
DTC P0756:
D Shift solenoid valve-B stuck or leakage.
D 1-2 shift valve stuck.
D 3-4 shift valve stuck.
D Valve body fluid passage clogged.
D Mechanical malfunction in transmission.
(2nd brake malfunction)
YES
Go to Step 2.
Go to Step 3.
Overhaul and repair
automatic transmis-
sion.
NO
Go to "A/T DIAG.
FLOW TABLE".
Faulty shift solenoid
valve-A or -B.
Faulty valve body.