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MANUAL TRANSMISSION - Troubleshooting <ACD> 22A-15 Code No.31 Steering wheel sensor <ST-1, ST-2, ST-N> system Probable cause Code No.31 is output when open circuit or short circuit of the steering wheel sensor output line (ST-1, ST-2, or ST-N) occurs. D Steering wheel sensor fault D Harness or connector fault D 4WD-ECU fault OK NG NO OK MUT-II Data List No.21 Steering wheel sensor voltage <ST-1> D No.22 Steering wheel sensor voltage <ST-2> D No.23 Steering wheel sensor voltage <ST-N> OK: Refer to P.22A-35 (Data List Reference Table). OK→Intermittent malfunction (Refer to GROUP 00 - Points to Note for Intermittent Malfunctions) Check the following connector: C-43 NG→Repair YES MUT-II Diagnosis Code Are the ABS Diagnosis Code Nos.81, 82, 83 output? MUT-II Data List No.21 Steering wheel sensor voltage <ST-1> D No.22 Steering wheel sensor voltage <ST-2> D No.23 Steering wheel sensor voltage < ST-N> OK: Refer to P.22A-35 (Data List Reference Table). NG→Replace the 4WD-ECU. OK→Intermittent malfunction (Refer to GROUP 00 - Points to Note for Intermittent Malfunctions) NG (No change from 0 V or from above 4.5 V) Measure at 4WD-ECU connector C-43. Measure the ECU terminal voltage. D Ignition switch: ON (1) Voltage between terminal 33 and earth (Steering wheel sensor <ST-1>) (2) Voltage between terminal 34 and earth (Steering wheel sensor <ST-2>) (3) Voltage between terminal 44 and earth (Steering wheel sensor <ST-N>) OK: When the steering wheel is turned, changes at approx. 1.5 V – 3.5 V. (1) NG NG (Changes at 1 V - 4.5 V or more) OK Check the harness between the steering wheel sensor and ignition switch. Check for open circuit, ground and damage of the power line. NG→Repair Check the following connectors: C-230, C-102, C-209, C-210 NG→Repair OK OK Check the following connectors: <L.H. drive vehicles> C-230, C-128, C-43 <R.H. drive vehicles> C-230, C-43 NG→Repair OK Check the harness between 4WD-ECU and steering wheel sensor. Check for open circuit, short circuit, and damage of the output line. NG→Repair Replace the steering wheel sensor. Replace the Steering wheel sensor. OK OK Check the following connector: C-230 NG→Repair NG Measure at Steering wheel sensor connector C-230. Disconnect the connector and measure at the harness side. D Ignition switch: ON D Voltage between terminal 2 and earth OK: System voltage D Resistance between terminal 3 and body earth OK: 2 Ω or less OK Check the following connectors: C-230, C-102, C-209, C-210 NG→Repair Check the harness between the ignition switch and steering wheel sensor. Check for open circuit and damage on power line. NG→Repair (2) NG OK Check the harness between the steering wheel sensor and body earth. Check for open circuit and damage of the earth line. NG→Repair Check the following connector: C-230, C-08 NG→Repair Measure at steering wheel sensor connector C-230. Disconnect the connector and measure at the harness side. D Ignition switch: ON (1) Voltage between terminal 2 and earth OK: System voltage (2) Resistance between terminal 3 and body earth OK: 2 Ω or less |