Inspection method for sensors
- Connect the M-MDS to the DLC-2.
- Switch the ignition to ON (engine off). NOTE: If the engine starts and runs, perform the following steps at idle.
- Access PIDs for the switch you are inspecting.
- Vibrate the sensor slightly with your finger. If the PID value is unstable or a malfunction occurs, inspect for poor connection and/or poorly mounted sensor.
Scheme 85
Scheme 85: Connector terminal inspection method
- Inspect the connection of each female terminal.
- Insert the male terminal to the female terminal and inspect the female terminal for looseness. (Scheme 85): Inspecting Female Terminals For Poor Connection
- Verify the symptom, and perform troubleshooting according to the appropriate number.
| No. | Symptom |
|---|
| 1 | Poor power steering assist |
| 2 | Excessive noise from electric power steering oil pump |
Diagnostic Procedure
| STEP | INSPECTION | ACTION |
|---|
| 1 | CONFIRM EHPAS DTC Retrieve the EHPAS DTC using the M-MDS. (See ELECTRO HYDRAULIC POWER ASSIST STEERING (EHPAS) ON-BOARD DIAGNOSIS .) Are any DTCs present? | Yes | Record all DTC and go to the applicable DTC inspection. (See ELECTRO HYDRAULIC POWER ASSIST STEERING (EHPAS) ON-BOARD DIAGNOSIS .) |
| No | Go to the next step. |
| 2 | INSPECT STEERING WHEEL ASSIST FUNCTION Disconnect the EHPAS control module connector (2-pin). Is the power steering assist function changed? | Yes | Go to the next step. |
| No | Visually inspect the steering gear and linkage. Replace the steering gear and linkage if the malfunction is found. (See STEERING GEAR AND LINKAGE REMOVAL/INSTALLATION .) |
| 3 | INSPECT IF THERE IS ANY FLUID LEAK FROM THE EHPAS FLUID LINE Visually inspect the EHPAS fluid line. Is there any fluid leakage? | Yes | Repair or replace the malfunctioning part according to the inspection result. If there is oil leakage from the pump, replace the power steering oil pump. (See ELECTRIC POWER STEERING OIL PUMP COMPONENT REMOVAL/INSTALLATION .) (See ELECTRIC POWER STEERING OIL PUMP COMPONENT DISASSEMBLY/ASSEMBLY .) |
| No | Replace the EHPAS control module. (See ELECTRIC POWER STEERING OIL PUMP COMPONENT REMOVAL/INSTALLATION .) |
| STEP | INSPECTION | ACTION |
|---|
| 1 | INSPECT POWER STEERING FLUID LEVEL Inspect the power steering fluid level when engine is cold. Is the power steering fluid level between MAX and MIN of the reserve tank? | Yes | Go to the next step. |
| No | Perform the Fluid Leakage Inspection and add the fluid. (See POWER STEERING FLUID INSPECTION .) |
| 2 | INSPECT AIR IN EHPAS FLUID LINE Perform the air bleed. (See AIR BLEEDING .) Is the symptom solved? | Yes | Symptom troubleshooting completed. |
| No | Go to the next step. |
| 3 | INSPECT ELECTRIC POWER STEERING OIL PUMP INSTALLATION Inspect the electric power steering oil pump installation condition. Is the electric power steering oil pump installed properly? | Yes | Go to the next step. |
| No | Install the electric power steering oil pump properly. |
| 4 | INSPECT MOUNT RUBBER CONDITION Inspect the mount rubber condition. Is the mount rubber deterioration? | Yes | Replace the bracket. |
| No | Replace the power steering oil pump. (See ELECTRIC POWER STEERING OIL PUMP COMPONENT REMOVAL/INSTALLATION .) (See ELECTRIC POWER STEERING OIL PUMP COMPONENT DISASSEMBLY/ASSEMBLY .) |
