DTC P0555
DTC P0555 : Brake Booster Pressure Sensor A Circuit High Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information .
| DTC Description | DTC | Freeze Frame |
|---|---|---|
| P0555 Brake Booster Pressure Sensor A Circuit High Voltage |
DTC (EVPS)
- Problem verification
-1. Turn the vehicle to the ON mode.
-2. Check the parameter (s) below with the HDS.
Signal Threshold Current Condition Values Unit Values Unit BRAKE BOOSTER PRESSURE SENSOR (A) VOLTAGE More than 4.71 V Do the current condition (s) match the threshold?
YES
Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the brake booster pressure sensor and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot .
- Determine possible failure area (GCU MON line, others) 1
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connector.
Brake booster pressure sensor 3P connector -3. Turn the vehicle to the ON mode.
-4. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode Brake booster pressure sensor 3P connector: disconnected Test point 1 Brake booster pressure sensor 3P connector (female terminals) No. 1: Test point 2 Brake booster pressure sensor 3P connector (female terminals) No. 2: Is there 4.8 V or more?
YES
Go to step 3.
NO
Go to step 5.
- Shorted wire check (GCU MON line to power)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Jump the SCS line with the HDS, and wait for more than 1 minute.
-3. Disconnect the following connector.
PCM connector A (50P) -4. Turn the vehicle to the ON mode.
-5. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode Brake booster pressure sensor 3P connector: disconnected PCM connector A (50P): disconnected Test point 1 Brake booster pressure sensor 3P connector (female terminals) No. 2: Test point 2 Body ground Is there 0.5 V or more?
YES
Repair a short to power in the GCU MON wire between PCM connector A (50P) terminal No. 21 and the brake booster pressure sensor.
NO
Go to step 4.
- Brake booster pressure sensor check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Substitute a known-good brake booster .
-3. Reconnect the following connectors.
Brake booster pressure sensor 3P connector PCM connector A (50P) -4. Turn the vehicle to the ON mode.
-5. Clear the DTC with the HDS.
-6. Turn the vehicle to the OFF (LOCK) mode, then ON mode.
-7. Check for DTCs with the HDS.
DTC Description DTC Freeze Frame P0555 Brake Booster Pressure Sensor A Circuit High Voltage Is DTC P0555 indicated?
YES
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM , then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM .
NO
- Determine possible failure area (GCU MON line, others) 2
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Connect terminals 1 and 2 with a jumper wire.
Terminal 1 Brake booster pressure sensor 3P connector (female terminals) No. 2: Terminal 2 Body ground -3. Turn the vehicle to the ON mode.
-4. Check the parameter (s) below with the HDS.
Signal Threshold Current Condition Values Unit Values Unit BRAKE BOOSTER PRESSURE SENSOR (A) VOLTAGE Less than 0.1 V Do the current condition (s) match the threshold?
YES
Go to step 6.
NO
Go to step 8.
- Brake booster pressure sensor check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Connect terminals 1 and 2 with a jumper wire.
Terminal 1 Brake booster pressure sensor 3P connector (female terminals) No. 1: Terminal 2 Brake booster pressure sensor 3P connector (female terminals) No. 2: -3. Check the parameter (s) below with the HDS.
Signal Threshold Current Condition Values Unit Values Unit BRAKE BOOSTER PRESSURE SENSOR (A) VOLTAGE Less than 0.1 V Do the current condition (s) match the threshold?
YES
NO
Go to step 7.
- Open wire check (SG6/SG2 line)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Remove the jumper wire from the brake booster pressure sensor 3P connector.
-3. Jump the SCS line with the HDS, and wait for more than 1 minute.
-4. Disconnect the following connector.
PCM connector E (80P) -5. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Brake booster pressure sensor 3P connector: disconnected PCM connector E (80P): disconnected Test point 1 Brake booster pressure sensor 3P connector (female terminals) No. 1: Test point 2 PCM connector E (80P) No. 58 Is there continuity?
YES
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM , then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM .
NO
Repair an open in the SG6/SG2 wire between PCM connector E (80P) terminal No. 58 and the brake booster pressure sensor.
- Open wire check (GCU MON line)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Remove the jumper wire from the brake booster pressure sensor 3P connector.
-3. Jump the SCS line with the HDS, and wait for more than 1 minute.
-4. Disconnect the following connector.
PCM connector A (50P) -5. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Brake booster pressure sensor 3P connector: disconnected PCM connector A (50P): disconnected Test point 1 Brake booster pressure sensor 3P connector (female terminals) No. 2: Test point 2 PCM connector A (50P) No. 21 Is there continuity?
YES
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM , then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM .
NO
Repair an open in the GCU MON wire between PCM connector A (50P) terminal No. 21 and the brake booster pressure sensor.