Chery T21 2014 Service Manual page 942

18 - QR019CHB CVT
DTC P2797
DTC P2798
DTC Code
Auxiliary Transmission
P2797 Fluid Pump
Performance
Auxiliary Transmission
P2798 Fluid Pump Control
Circuit Low
DTC Confirmation Procedure:
Confirm that battery voltage is between 11 and 14 V before performing the following procedures.
 Turn ignition switch to LOCK.
 Connect X-431 3G diagnostic tester (the latest software) to Data Link Connector (DLC), and make it
communicate with vehicle electronic module by the data network.
 Turn ignition switch to ON.
 Using X-431 3G diagnostic tester to record and clear the DTCs stored in the TCU.
 Turn ignition switch to LOCK and wait for a few seconds.
 Turn ignition switch to ON, and then select "Read Code".
 If DTC is detected, the malfunction indicated by the DTC is current. Go to the diagnosis procedure - Step 1.
18
 If DTC is not detected, the malfunction indicated by the DTC is intermittent. Please refer to Intermittent
DTC Troubleshooting.
Diagnosis Procedure
HINT:
After the fault is eliminated, verify DTC and symptom again.
1
Carry out following preliminary checks
a. Transmission wire harness connector (check for looseness, dirt and other fault).
b. Transmission wire harness (check for damage, dirt and other fault).
c. Are all checks OK?
Repair fault
NG
108
18–
Auxiliary Transmission Fluid Pump Performance
Auxiliary Transmission Fluid Pump Control Circuit Low
DTC Detection
DTC Definition
Start engine and wait
for at least 10 seconds
DTC Set
Condition Condition
The difference of
the target oil
pressure and
actual oil
pressure is
higher than the
table value
The difference of
the target oil
pressure and
actual oil
pressure is
higher than table
value, and is
maintained for
over 700 ms
Chery Automobile Co., Ltd.
Possible Cause
 Oil pressure
control valve core
seized
 Hydraulic system
pressure failure
OK