18–
105
18
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.
a. Turn ignition switch to LOCK.
b. Disconnect the transmission wire harness connector.
c. Check if the transmission wire harness connector is dirty, oxidized, loose or damaged.
DTC Code
DTC Definition
DTC Detection
Condition
DTC Set
Condition
Possible Cause
P0970
Pressure Control
Solenoid 'C' Control
Circuit Low
Start engine and wait
for at least 3 seconds
The solenoid
output feedback
voltage is
normal, oil
pressure control
solenoid 'C'
feedback current
is higher than the
standard max
value
Solenoid circuit
open circuit or
short circuit
Oil pressure
control solenoid 'C'
failure
P0971
Pressure Control
Solenoid 'C' Control
Circuit High
The solenoid
output feedback
voltage is
normal, oil
pressure control
solenoid 'C'
feedback current
is less than the
standard value
1
Check wire harness connector
Repair fault
NG
OK