Description
Unbalance steering wheel turning force (torque variation).
Diagnosis Procedure
1.PERFORM SELF-DIAGNOSIS
With CONSULT
Is any DTC detected?
YES >> Check the DTC. Refer to STC "DTC Index".
NO >> GO TO 2.
2.CHECK THE ILLUMINATION OF THE EPS WARNING LAMP
Check the EPS warning lamp while the engine is started.
Does the EPS warning lamp turn OFF?
YES >> GO TO 3.
NO >> Refer to STC "Diagnosis Procedure".
3.CHECK STEERING COLUMN AND STEERING GEAR
Check the steering column assembly and steering gear assembly.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace the malfunctioning component.
4.CHECK EPS CONTROL UNIT SIGNAL (1)
With CONSULT
CAUTION: Never drive the vehicle.
Does the item in "DATA MONITOR" maintain "100%"?
YES >> GO TO 7.
NO >> GO TO 5.
5.CHECK EPS CONTROL UNIT SIGNAL (2)
With CONSULT
Select "BATTERY VOLT" in "DATA MONITOR" in "EPS".
Does the item in "DATA MONITOR" indicate "10 V" or more?
YES >> GO TO 6.
NO >> Perform trouble diagnosis of EPS control unit power supply and ground. Refer to STC "Diagnosis Procedure".
6.CHECK EPS CONTROL UNIT SIGNAL (3)
With CONSULT
NOTE: While stopping the EPS system, do not turn steering wheel.
Does the symptom continue?
YES >> GO TO 7.
NO >> The assist torque decreases because of protection function. This is not a malfunction. Inspection End.
7.CHECK EPS CONTROL UNIT SIGNAL (4)
With CONSULT
CAUTION: Never drive the vehicle.
Is the inspection result normal?
YES >> GO TO 9.
NO >> GO TO 8.
8.CHECK EPS MOTOR
Perform the trouble diagnosis of EPS motor. Refer to STC "Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 9.
NO >> Repair or replace the malfunctioning component.
9.CHECK STEERING WHEEL TURNING FORCE
Check the steering wheel turning force. Refer to ST "Inspection".
Is the inspection result normal?
YES >> Inspection End.
NO >> Check the steering wheel turning force for mechanical malfunction. Refer to ST "Inspection".
REMOVAL AND INSTALLATION
Description Unbalance steering wheel turning force and return between right and left. Diagnosis Procedure 1.CHECK THE ILLUMINATION OF THE EPS WARNING LAMP Check the EPS warning lamp while engine ...
Exploded View 1. Steering column assembly 2. Bracket 3. EPS control unit Removal and Installation REMOVAL Perform a CPU memory erase on the EPS with CONSULT before removal. CAUTION: ...
P0977 Shift solenoid B
DTC Logic
DTC DETECTION LOGIC
DTC
Trouble diagnosis name
DTC detection condition
Possible causes
P0977
Shift Solenoid B Control Circuit
High
The following diagnosis conditions
are met, and the TCM low
clutch solenoid valve current
monitor reading is 200 ...
Diagnosis and repair work flow
Work Flow
OVERALL SEQUENCE
DETAILED FLOW
1. OBTAIN INFORMATION ABOUT SYMPTOM
Interview the customer to obtain as much information as possible about the
conditions and environment under
which the malfunction occurred.
>> GO TO 2
2. REPRODUCE THE MALFUNCTION INFORMATION
Check the ...