ABS-445

N. ABS-41X, ABS-421, ABS-422, ABS-432, ABS-445

ABS-411 Inlet valve LH front wheel, fault in valve coil circuit
ABS-412 Outlet valve LH front wheel, fault in valve coil circuit
ABS-413 Inlet valve RH front wheel, fault in valve coil circuit
ABS-414 Outlet valve RH front wheel, fault in valve coil circuit
ABS-421 Inlet valve rear wheel, fault in valve coil circuit
ABS-422 Outlet valve rear wheel, fault in valve coil circuit
ABS-432 Control module, general interference problem
ABS-445 control module, general valve fault

NA. DTC information

Condition

DTC ABS-411, ABS-412, ABS-413, ABS-414, ABS-421, ABS-422

If the outlet or inlet valve circuits in the control module are short circuited to ground/power or if there is a break in the circuit, the control module will interpret this as a fault and fault code ABS-411, ABS-412, ABS-413, ABS-414, ABS-421 or ABS-422 will be recorded depending upon the valve

DTC ABS-432

If the control module is subjected to interference so that these calculations do not correspond, DTC ABS-432 is recorded The DTC is recorded when if any of DTCs. ABS-411, ABS-412, ABS-413, ABS-414, ABS-421, ABS-423, ABS-442, ABS-444 or ABS-445 are posted and the cause of these DTCs is permanent for more than two drive cycles

DTC ABS-445

If the control module registers that there is a fault in the control module internal circuits for the inlet and outlet valves, DTC ABS-445 will be recorded The DTC will be recorded even if any of DTCs ABS-411, ABS-412, ABS-413, ABS-414, ABS-421, ABS-422 or ABS-423 are registered

Substitute value

- The ABS/TRACS-system is disconnected
- The EBD-system is disconnected

Possible source

- Defective control module

Note! For certain control modules, DTCs can be recorded for the following reasons:
- Fuse 14 defective (for 850 diesel, fuse 11A/4).
- Break in the voltage supply (30 volts) to control module #9
- Contact resistance in the connections These control modules can be identified by the identification code in the lower left corner of the control module product plate beginning with "M5...." for ABS control modules and with "P1...." for TRACS control modules

Fault symptom(s)

- When the ABS/EBD system is disconnected there is a risk of the wheels (especially the rear wheels) locking when braking
- In cars with TRACS, the anti-wheelspin system cuts out

Fault-tracing begins with NB. Other DTCs, status notifications and status checks.

NB. other DTCs, status notifications and status checks

[NB1]

Other DTCs

- Note other DTCs

Select one of the above alternatives to continue

Alternative 1: NB3
Alternative 2: NB2
Alternative 3: NB3

[NB2]

DTC ABS-432 is registered together with DTC ABS-433 and/or ABS-443

Trace faults first as per P. ABS-433 Battery voltage ABS-433 and/or R. ABS-443 Pump motor. ABS-443

Then continue with: NB4

[NB3]

Status notification

ABS-411, ABS-412, ABS-413, ABS-414, ABS-421, ABS-422, ABS-432, ABS-445.
Select one of the following alternatives to continue

Alternative 1: Trace fault as per NC. Permanent fault.
Alternative 2: Trace fault as per ND. Intermittent fault.

[NB4]

Statuskontroll

- Disconnect the Volvo System Tester to abort the diagnosis

Warning! The ABS and EBD Systems are not available when Volvo Diagnostics is activated. Take great care when test driving as there is a serious risk of the wheels locking when braking

- Test drive as per SA. Test driving. Test Driving [SA]
- Read-out the DTC status Is the status intermittent ?

Yes: Fault-trace as per ND. Intermittent fault.
No: Fault-trace as per NC. Permanent fault.

NC. Permanent fault

[NC1]

Identification of the control module version

Different fault-tracing should be carried out depending on the control module version. Note the identification code in the lower left corner of the control module product plate
Does the identification code begin with "M5...." or "P1...."?

Yes: NC2
No: NC11

[NC2]

Connection of test box and check of control points

Connect test box as per JJJA. Connect the test box. Pinout Values and Diagnostic Parameters

Then proceed to: NC3

[NC3]

Control of 30 volt supply to the control module

- Ignition off
- Control module disconnected

Connect a voltmeter between #8 and #9 on the test box.
The voltmeter should indicate the battery voltage

If reading is OK: NC9
If reading is incorrect: NC4

[NC4]

Checking fuse

Check that fuse 11/14 is intact. (For 850 diesel fuse 11A/4, applies.)
Is the fuse intact?

Yes: NC6
No: NC5

[NC5]

Checking for short-circuit and replacing component

Check wire between fuse 11/14 and control module #9 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 #25 for short-circuit to ground according to [IIIB3].) Check Communication to Control Module [III]
Then replace the fuse.

Then continue with: NC12

[NC6]

Checking voltage before the fuse

Connect a voltmeter between the rear fuse holder socket for fuse 11/14 and ground. (For 850 diesel pin in fuse 11A/4 applies).
The voltmeter should read battery voltage.

If reading is OK: NC7
If reading is incorrect: NC8

[NC7]

Checking for an open-circuit in the wire

Check wire between fuse 11/14 and the control module #9 for open-circuit according to [IIIB2]. (For 850 diesel fuse 11A/4, applies). Check Communication to Control Module [III]

Then continue with: NC12

[NC8]

Checking for an open-circuit in the wire

Check wire between fuse 11/14 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: NC12

[NC9]

Check the control module

- Disconnect the test box
- Disconnect the control module
- Reconnect the control module
- Disconnect the Volvo System Tester to abort the diagnosis

Warning! The ABS and EBD systems are not available while Volvo Diagnostics is activated. Take great care when test driving as there is a serious risk of the wheels locking when braking

Test drive the vehicle.
Note the DTC status. Is the status intermittent ?

Yes: NC10
No: NC11

[NC10]

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 [IIIB5]. Check Communication to Control Module [III]

Then continue with: Fault corrected

[NC11]

Replacement of the component

Test with a new control module MMMM. Control module, replacement.
Relays and Modules - Brakes and Traction Control - Electronic Brake Control Module - Service and Repair - Procedures Service and Repair

Then continue with: NC12

[NC12]

Verification

Hint: After repair it is necessary to check that the fault has been rectified

- Ignition off
- 11 switches, components etc. remain

Disconnect the Volvo System Tester to abort the diagnosis

Warning! The ABS and EBD systems are not available while Volvo Diagnostics is activated. Take great care when test driving as there is a serious risk of the wheels locking when braking

Test drive the vehicle as per SA. Test driving. Test Driving [SA]
Note the DTC status Is the status intermittent ?

Yes: Fault corrected
No: NC13

[NC13]

Fault-tracing information

The verification result shows that the fault persists.
Do you want to exit fault-tracing?

Yes: Fault not corrected
No: NC2

ND. Intermittent fault

[ND1]

Identification of the control module version

Check the cable between the battery positive terminal and control module #9 for intermittent breaks [IIIB2]. Check Communication to Control Module [III]

Then continue with: ND3

[ND3]

Erasing the DTC

- Ignition on
- Erase the DTC

Then continue with: ND4

[ND4]

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: ND2
No: Operation done