ABS-141
B. ABS-141 EBD-pressure sensorBA. DTC information
Condition
EBD pressure sensor contacts are normally closed when the hydraulic brake system primary circuit is not under pressure and open when the system is under pressure (braking in progress). If the control module registers that the pressure sensor circuit is open when the car accelerates over 30 km/h (18 mph), the circuit is closed when the car is retarding or that the circuit is short circuited to ground, the control module interprets this as a fault and DTC ABS-141 is posted.
Substitute value
- ABS/TRACS cuts out
- EBD system is available.
Possible source
- Signal lead short circuiting to ground or current
- Break in ground or signal lead
- Ground and signal lead short circuiting to each other
- Defective pressure sensor
- Contact resistance in connections
Fault symptom(s)
- If ABS cuts out, there is a risk of the wheels locking when braking hard
- In cars with TRACS, the anti-wheel slip system cuts out.
Fault-tracing begins with BB. Other DTCs, status notifications and status checks.
BB. Other DTCs, status notifications and status checks
[BB1]
Other DTCs
Select one of the above alternatives to continue
Alternative 1: BB2
Alternative 2: BB3
[BB2]
Status notification
Select one of the following alternatives to continue
Alternative 1: Fault-trace as per BC. Circuit fault. Permanent fault
Alternative 2: Fault-trace as per BD. Circuit fault. Intermittent fault
[BB3]
Status check
- Ignition on
- Go into rolling value, list 3
- Note the EBD pressure sensor reading
- Start the engine so that a vacuum is built up in the brake servo
- Turn off the engine
- Ignition on
- Press the brake pedal hard
Note the EBD pressure sensor reading
With the brake pedal released the reading should indicate OFF.
With the brake pedal depressed, the reading should indicate ON
If reading is OK: Fault-trace as per BD. Circuit fault. Intermittent fault
If reading is incorrect: Fault-trace as per BC. Circuit fault. Permanent fault
[BB3]
Status check
- Ignition on
- Go into rolling value, list 3
- Note the EBD pressure sensor reading
- Start the engine so that a vacuum is built up in the brake servo
- Turn off the engine
- Ignition on
- Press the brake pedal hard
Note the EBD pressure sensor reading
With the brake pedal released the reading should indicate OFF.
With the brake pedal depressed, the reading should indicate ON
If reading is OK: Fault-trace as per BD. Circuit fault. Intermittent fault
If reading is incorrect: Fault-trace as per BC. Circuit fault. Permanent fault
BC. Circuit fault. Permanent fault
[BC1]
Connect the test box and check the control points
Connect test box as per. JJJA. Connect the test box. Pinout Values and Diagnostic Parameters
Then proceed to: BC2
[BC2]
Check the resistance in the EBD pressure sensor circuit
- Ignition off
- Control module disconnected
- Connect an ohmmeter between #5 and #7 to the test box
- Start the engine so that a vacuum is built up in the break servo
- Switch off the engine
- Depress the brake pedal hard
Note the ohmmeter reading
With the brake pedal released the ohmmeter should indicate approx. 0 ohms
With the brake pedal depressed the ohmmeter should indicate infinite resistance
If reading is OK: BC12
If reading is incorrect: BC3
[BC3]
Check the resistance in the EBD pressure sensor
- Ignition off
- Disconnect the EBD pressure sensor
- Connect an ohmmeter between connection 1 and 2 on the EBD pressure sensor contact
- Start the engine so that a vacuum is built up in the brake servo
- Switch off the engine
- Depress the brake pedal hard
Note the ohmmeter reading
With the brake pedal released the ohmmeter should read 0 ohms.
With the brake pedal depressed hard the ohmmeter should indicate infinite resistance
If reading is OK: BC5
If reading is incorrect: BC4
[BC4]
Replacing components
Test with a new EBD pressure sensor as per FFFF, EBD pressure sensor replacement.
Refer to Sensors and Switches - Brakes and Traction Control - Brake Fluid Pressure Sensor/Switch - Service and Repair - Procedures
Then continue with: BC16
[BC5]
Check the resistance in the signal cable (+)
- Ignition off
- EBD pressure sensor disconnected
- Control module disconnected
Connect an ohmmeter between connection 1 and 5 on the EBD pressure sensor contact to the test box
The ohmmeter should indicate 0 ohms
If reading is OK: BC7
If reading is incorrect: BC6
[BC6]
Check for circuit breaks
Check the cable between connection 1 on the EBD pressure sensor contact and control module #5 for breaks as per [IIIB2]. Check Communication to Control Module [III]
Then continue with: BC16
[BC7]
Check the resistance In the signal cable(-)
- Ignition off
- EBD pressure sensor disconnected
- Control module disconnected
Connect an ohmmeter between connection 2 and 7 on the EBD pressure sensor contact to the test box.
The ohmmeter should indicate approx. 0
If reading Is OK: BC9
If reading is incorrect: BC8
[BC8]
Check for circuit breaks
Check the circuit between connection 2 on the EBD pressure sensor and control unit #7 for breaks as per [IIIB2]. Check Communication to Control Module [III]
Then continue with: BC16
[BC9]
Control of signal cable (+) resistance to cable (-) signal
- Ignition off
- EBD pressure sensor disconnected
- Control module disconnected
Connect an ohmmeter between #7 and #5 on the test box
The ohmmeter should indicate infinite resistance
If reading is OK: BC10
If reading is incorrect: BC11
[BC10]
Check contact resistance and oxidation
The cause of the DTC has been poor contact in the EBD pressure sensor contact area
Check the EBD pressure sensor for contact resistance and oxidation and take appropriate action [IIIB5]. Check Communication to Control Module [III]
Then continue with: BC16
[BC11]
Check for short circuiting
Check the circuit between the EBD pressure sensor contact connection:
1 and control module #5
2 and control module #7
for short circuiting to ground [IIIB5] Check Communication to Control Module [III]
Then continue with: BC16
[BC12]
Check the EBD pressure sensor circuit
- Ignition off
- Connect the control module
- Ignition on
- Brake pedal released
Connect a voltmeter between #5 and #8 on the test box
The voltmeter should read 5-6V.
If reading is OK: BC13
If value is lower: BC14
If value is higher: BC15
[BC13]
Check for contact resistance and oxidation
The cause of the DTC has been poor contact in the control module contact
Check the control module contact for contact resistance and oxidation and take appropriate action [IIIB5]. Check Communication to Control Module [III]
Then continue with: BC16
[BC14]
Check for short circuiting
Check the circuit between the EBD pressure sensor contact connection:
1 and control module #5
2 and control module #7
for short circuiting to ground [IIIB3]. Check Communication to Control Module [III]
Then continue with: BC16
[BC15]
Check for short circuiting
Check the circuit between the EBD pressure sensor contact connection:
1 and control module #5
2 and control module #7
for short circuiting to power [IIIB4]. Check Communication to Control Module [III]
Then continue with: BC16
[BC16]
Verification
Hint: After repair it is necessary to check that the fault has been rectified
- Ignition off
- Reconnect the contacts,components etc.
- Ignition on
- Go into rolling value, list 3
- Note the EBD pressure sensor reading
- Start the engine so that a vacuum is built up in the brake servo
- Switch off the engine
- Ignition on
- Depress the brake pedal hard
Note the EBD pressure sensor reading
With the brake pedal released the reading should indicate OFF.
With the brake pedal depressed the reading should indicate ON bromspedalen nedtrampad
If reading is OK: Fault corrected
If reading is incorrect: BC17
[BC17]
Fault-tracing information
The verification result shows that the fault persists. Do you want to exit fault-tracing?
Yes: Fault not corrected
No: BC1
BD. Circuit fault. Intermittent fault
[BD1]
Check leads and connections
Check the control module and EBD pressure sensor contacts for contact resistance and oxidation [IIIB6]. Check Communication to Control Module [III]
Check the cable between the EBD pressure sensor contact connection:
1 and control module #5
2 and control module #7
for intermittent breaks [IIIB2], intermittent short circuiting to ground [IIIB3] and intermittent short circuiting to power [IIIB4]. Check Communication to Control Module [III]
Then continue with: BD2
[BD2]
Fault-tracing information
For intermittent faults fault-tracing is not followed by a verification because the fault is not present at this moment.
Do you want to repeat fault-tracing?
Yes: BD1
No: Operation done