ABS-443
R. ABS-443 Pump motorRA. DTC information
Condition
The control module determines whether the pump is working by checking to see if the pump is working without being activated, it there is a voltage supply to the pump motor when activated or if the signal which is generated in the pump motor circuit from the pump motor voltage supply is broken (generated voltage).
The control module also checks continuously for breaks in the circuit. The control module checks the pump motor by activating it the first time the car reaches 20 km/h (25 mph) if the brake light switch has been activated during the same period when the ignition is switched on, or under normal ABS/TRACS control. If the control module registers that the pump does not start, runs continuously, or there is a break in the circuit, DTC ABS-443 is posted.
Substitute value
- ABS/TRACS cuts out.
- EBD system is available.
Possible source
- Fuse 9 defective.
- Break in voltage supply (30-supply) to control module #25 for the pump motor.
- Break in voltage supply to the pump motor.
- Break in the pump motor ground lead.
- Defective pump motor.
- Contact resistance in the connections.
Fault symptom(s)
- If the ABS function cuts out, there is a risk of the wheels locking when braking.
- In cars with TRACS, the anti-wheelslip system cuts out.
RB. Other DTCs, status notifications and status checks
[RB1]
Other DTCs
- Note other DTCs
Select one of the above alternatives to continue
Alternative 1: RB2
Alternative 2: RB3
[RB2]
Status notification
Select one of the following alternatives to continue
Alternative 1: Fault-trace as per RC. Electrical or mechanical fault Permanent fault.
Alternative 2: Fault-trace as per RD. Electrical or mechanical fault Intermittent fault.
[RB3]
Status check
- Ignition off
- Ignition on
- Use the Activation system to activate the pump motor
Check that the pump motor starts and works normally
Is the pump OK ?
Yes: Fault-trace as per RD. Electrical or mechanical fault. Intermittent fault.
No: Fault-trace as per RC. Electrical or mechanical fault. Permanent fault.
RC. Electrical or mechanical fault. Permanent fault
[RC1]
Connect the test box and check the contact points
Connect test box as per [JJJA]. Connect the test box Pinout Values and Diagnostic Parameters
Then proceed to: RC2
[RC2]
Check the voltage supply to the control module
- Ignition off.
- Control module disconnected.
Connect a voltmeter between #25 and #8 on the test box.
The voltmeter should indicate the approx. battery voltage.
If reading is OK: RC8
If reading is incorrect: RC3
[RC3]
Checking fuse
Check that fuse 11/9 is intact. (For 850 diesel fuse 11A/4, applies)
Is the fuse intact?
Yes: RC5
No: RC4
[RC4]
Checking for short-circuit and replacing component
Check wire between fuse 11/9 and control module #25 for short-circuit to ground according to [IIIB3]. (For 850 diesel, check the wire between fuse 11A/4 and control module #9, and fuse 11A/4 and #9 for short-circuit to ground according to [IIIB3].) Check Communication to Control Module [III]
Then replace the fuse.
Then continue with: RC15
[RC5]
Checking voltage before the fuse
Connect a voltmeter between the rear socket (towards windshield) on the fuse holder for fuse 11/9 and ground. (For 850 diesel pin in fuse 11A/4, applies).
The voltmeter should read approx. battery voltage
If reading Is OK: RC6
If reading is incorrect: RC7
[RC6]
Checking for an open-circuit in the wire
Check wire between fuse 11/9 and the control module #25 for open-circuit according to [IIIB2]. (For 850 diesel fuse 11A/4, applies). Check Communication to Control Module [III]
Then continue with: RC15
[RC7]
Checking for an open-circuit in the wire
Check wire between fuse 11/9 and the battery for open-circuit according to [IIIB2]. (For 850 diesel fuse 11A/4, applies). Check Communication to Control Module [III]
Then continue with: RC15
[RC8]
Check the pump motor circuit for resistance to ground
- Ignition off.
- Pump motor connector disconnected.
Connect an ohmmeter between pump motor connector connection M+ and ground.
The ohmmeter should indicate infinite resistance.
If reading is OK: RC10
If reading is incorrect: RC9
[RC9]
Check for short circuiting and replace component
Check the leads between the pump motor and the pump motor connector for short circuiting to ground as per [IIIB3]. Check Communication to Control Module [III]
If the leads are OK, test with a new hydraulic modulator OOOO. Hydraulic modulator, replacement.
Antilock Brakes / Traction Control Systems - Service and Repair - Procedures Service and Repair
Then continue with: RC15
[RC10]
Check the pump motor
Connect temporarily a protected cable between the pump motor connector.
- connection M- and the battery negative terminal.
- connection M+ and the battery positive terminal.
When the cable is connected to the battery the motor should start. Run the engine for a maximum of 10 seconds. Remove the temporarily connected leads.
Does the pump motor start and run normally?
Yes: RC12
No: RC11
[RC11]
Check for cable breaks and short circuiting
Check the leads between the pump motor and the pump motor connector for breaks as per [IIIB2]. Check Communication to Control Module [III]
If the leads are OK test with a new hydraulic modulator as per [OOOO]. Hydraulic modulator, replacement.
Antilock Brakes / Traction Control Systems - Service and Repair - Procedures Service and Repair
Then continue with: RC15
[RC12]
Check the control module
- Ignition off.
- Connect the pump motor connector.
- Ignition on.
- Use the Activation system to activate the pump motor.
Check that the pump motor starts and runs normally. Is the pump OK ?
Yes: RC13
No: RC14
[RC13]
Check for contact resistance and oxidation
The fault has been caused by poor contact in the control module or pump motor connectors
Take appropriate action for contact resistance and oxidation in the connectors as per [IIIB5]. Check Communication to Control Module [III]
Then continue with: RC15
[RC14]
Replacement of component
Test with a new control module as per MMMM. Control module, replacement.
Antilock Brakes / Traction Control Systems - Service and Repair - Procedures Service and Repair
Then continue with: RC15
[RC15]
Verification
Hint: After repair it is necessary to check that the fault has been rectified.
- Ignition off.
- Reconnect the connections, components etc.
- Ignition on.
- Use the Activation system to activate the pump motor.
Check that the pump motor starts and runs normally. Is the pump OK ?
Yes: Fault corrected
No: RC16
[RC16]
Fault-tracing information
The verification result shows that the fault persists.
Do you want to exit fault-tracing?
Yes: Fault not corrected
No: RC1
RD. Electrical or mechanical fault. Intermittent fault
[RD1]
Check leads and connections
Check the pump motor and pump motor connector for contact resistance and oxidation [IIIB6]. Check Communication to Control Module [III]
Check the leads between the pump motor and the pump motor connector for intermittent break as per [IIIB2] and intermittent short circuiting to ground as per [IIIB3]. Check Communication to Control Module [III]
Check the cable between the battery and control module #25 for intermittent breaks as per [IIIB2]. Check Communication to Control Module [III]
Then continue with: RD2
[RD2]
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: RD1
No: Operation done