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DTC P0558: Brake Booster Pressure Sensor Circuit High Input
 
 
 
 
CIRCUIT OPERATION
  • A power voltage of 5 V is applied to the brake booster pressure sensor connector power terminal from the ECM connector terminal BPS5 and grounded to the ECM connector terminal BPE5 from the brake booster pressure sensor connector ground terminal.
  • The sensor signal is inputted to the ECM connector terminal BBPS from the brake booster pressure sensor connector output terminal.
 
 
TECHNICAL DESCRIPTION
  • The brake booster pressure sensor detects a change in brake booster negative pressure and inputs the signal to the ECM.
 
 
DTC SET CONDITIONS
Check Conditions
  • After 2 seconds since the ignition switch is turned ON or since the completion of engine start.
  • Battery positive voltage is more than 10 V and is less than 16.5 V.
Judgment Criterion
  • Senor output voltage is 4.8 V or more for 2 seconds (corresponding to 120 kPa or less of the brake booster pressure).
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • When depressing the brake pedal or when releasing the accelerator pedal, stop the A/C.
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be stored are: )
  • Failed brake booster pressure sensor
  • Open circuit or harness damage in brake booster pressure sensor circuit or loose connector contact
  • Failed ECM
 
 
 
DIAGNOSIS
Required Special Tools:
  • MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
  • MB992745: V.C.I.-Lite main harness A
  • MB992747: V.C.I.-Lite USB cable short
  • MB992748: V.C.I.-Lite USB cable long
  • MB991958: Scan Tool (M.U.T.-III Sub Assembly)
    • MB991824: Vehicles Communication Interface (V.C.I.)
    • MB991827: M.U.T.-III USB Cable
    • MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
STEP 1. Using scan tool (M.U.T.-III), check data list item 171: Brake Booster Pressure Sensor.
cautionTo prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
(1) Connect scan tool (M.U.T-III). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III) .
(2) Turn the ignition switch to the "ON" position.
(3) Check the following item in the data list. Refer to Data List Reference Table .
  1. Item 171: Brake booster pressure sensor
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the sensor operating properly?
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
Go to Step 2.
 
STEP 2. Measure the resistance at brake booster pressure sensor harness side connector.
(1) Disconnect the brake booster pressure sensor connector and measure at the harness side.
(2) Measure the resistance between terminal BPES line and ground.
  • Continuity (2 ohms or less)
Does continuity exist?
Go to Step 5.
Go to Step 3.
 
STEP 3. Check of open circuit and damage in BPES line between brake booster pressure sensor connector and ECM connector.
Is the harness wire in good condition?
Go to Step 4.
Repair the connector(s) or wiring harness. Then go to Step 7.
 
STEP 4. Using scan tool (M.U.T.-III), check data list item 171: Brake Booster Pressure Sensor.
(1) Turn the ignition switch to the "ON" position.
(2) Check the following items in the data list. Refer to Data List Reference Table .
  1. Item 171: Brake booster pressure sensor
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Is the sensor operating properly?
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
Replace the ECM (Refer to Removal and Installation ). Then go to Step 7.
 
STEP 5. Using scan tool (M.U.T.-III), check data list item 171: Brake Booster Pressure Sensor.
(1) Turn the ignition switch to the "ON" position.
(2) Check the following items in the data list. Refer to Data List Reference Table .
  1. Item 171: Brake booster pressure sensor
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Is the sensor operating properly?
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
Go to Step 6.
 
STEP 6. Replace the brake booster pressure sensor
(1) Replace the brake booster pressure sensor.
(2) Turn the ignition switch to the "ON" position.
(3) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is DTC P0558 stored?
Replace the ECM (Refer to Removal and Installation ). Then go to Step 7.
Check end.
 
STEP 7. Using scan tool (M.U.T.-III), read the diagnostic trouble code (DTC).
(1) Turn the ignition switch to the "ON" position.
(2) After the DTC has been deleted, read the DTC again.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Is DTC P0558 stored?
The inspection is complete.
Retry the troubleshooting.