Chery T21 2014 Service Manual page 890

18 - QR019CHB CVT
DTC P0730
DTC Code
P0730 Incorrect Gear Ratio
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.
 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.
18
1
Carry out following preliminary checks
a. Engine wire harness (check for looseness, dirt and other fault)
b. Transmission sensor (check for damage, dirt and other fault)
c. Are all checks OK?
Repair fault
NG
2
Check transmission system
a. Use diagnostic tester to check the transmission system.
b. Is there any DTC except for P0730?
56
18–
Incorrect Gear Ratio
DTC Detection
DTC Definition
Start engine and keep
it at following status for
at least 1 min: throttle
opening not less than
15%, at D gear, vehicle
speed not less than 18
km/h
DTC Set
Condition Condition
The absolute
value of
difference of
target speed
ratio and actual
speed ratio is
higher than the
standard value
Chery Automobile Co., Ltd.
Possible Cause
 Speed ratio control
valve body circuit
seized
 Solenoid wire
harness or
connector open
circuit or short
circuit
 Auxiliary oil
pressure control
failure or too low
OK