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STEERING WHEEL TURNING FORCE IS HEAVY OR LIGHT STC-33 < SYMPTOM DIAGNOSIS > C D E F H I J K L M A B STC N O P STEERING WHEEL TURNING FORCE IS HEAVY OR LIGHT Description INFOID:0000000009945991 Steering wheel turning force is heavy or light. Diagnosis Procedure INFOID:0000000009945992 1. PERFORM SELF-DIAGNOSIS With CONSULT 1. Turn the ignition switch OFF to ON. 2. Perform “EPS” self-diagnosis. Is any DTC detected? YES >> Check the DTC. Refer to NO >> GO TO 2. 2. CHECK THE ILLUMINATION OF THE EPS WARNING LAMP Check that the EPS warning lamp turns ON when ignition switch turns ON. Then, EPS warning lamp turns YES >> GO TO 3. NO >> Perform trouble diagnosis of EPS warning lamp. Refer to 3. CHECK EPS CONTROL UNIT SIGNAL (1) With CONSULT 1. Start the engine. CAUTION: Never drive the vehicle. 2. Select “ASSIST LEVEL” in “DATA MONITOR” in “EPS”. Dose the item in “DATA MONITOR” indicate “100%”? YES >> GO TO 6. NO >> GO TO 4. 4. CHECK EPS CONTROL UNIT SIGNAL (2) With CONSULT Select “BATTERY VOLT” in “DATA MONITOR” in “EPS”. Dose the item in “DATA MONITOR” indicate “10 V” or more? YES >> GO TO 5. NO >> Perform trouble diagnosis of EPS control unit power supply and ground. Refer to . 5. CHECK EPS CONTROL UNIT SIGNAL (3) With CONSULT 1. Select “ASSIST LEVEL” in “DATA MONITOR” in “EPS”. 2. Stop the EPS system until the item in “DATA MONITOR” becomes “100%”. 3. Check that the symptom continues. Dose the symptom continue? YES >> GO TO 6. NO >> The assist torque decreases because of protection function. This is not malfunction. INSPEC- TION END 6. CHECK EPS CONTROL UNIT SIGNAL (4) With CONSULT 1. Start the engine. CAUTION: |