SAAB WIS ONLINE

B1195

Symptom: ABS (ANTI LOCK) warning lamp on, no ABS function.

B1195

Main relay circuit, faulty


Fault symptom

ABS (ANTI LOCK) warning lamp on, no ABS function.

Condition

The trouble code is generated when the ignition is switched on and the subsequent test is performed if battery voltage is less than 5 V for longer than 30 seconds, or while the car is being driven if battery voltage is less than 5 V for longer than 20 milliseconds.

Diagnostic help

A reading of the control module's power supply (+30 circuit) can be obtained with the ISAT scan tool.

- Select ”READ VALUES”.

- Select ”BATTERY VOLTAGE”.

The current battery voltage will be displayed. If the +15 circuit is not connected to the control module, perhaps because fuse 19 has blown, no communication will be established.

Diagnostic procedure

1 Check the fuses


- Check that:

• fuse 22 is intact

• current is supplied to fuse 22



- Connect the test lamp to fuse 22 and a good grounding point.


Fuse inspection OK?

yes

Continue with point 2.


no

Rectify the fault and if necessary continue fault diagnosis as described in Service Manual 3:2 Electrical system, +30 power supply.


2 Check the battery




- Check the condition of the battery. See Service Manual 3:1, Electrical system, Battery .


Is the condition of the battery OK?

yes

Continue with point 2.


no

Rectify the fault.


3 Check the control module's power supply and connection to ground



- Unplug the control module's 4-pin connector.

- Ignition switch in ON position.

- Take voltage readings on the control module's connector:



• pin 1 to battery positive (B+) <0.5

• pin 2 to battery positive (B+) <0.5

• pin 3 to battery negative (B-) <0.1 V


Are all voltage readings OK?

yes

Continue with point 3.


no

Check the wiring, including connectors and grounding point G30. Rectify if necessary.


4 Final check



- Clear the diagnostic trouble code.

- Drive the car at varying engine loads and rpm for 5 minutes.

- Read the diagnostic trouble code.


Is the diagnostic trouble code stored?

yes

Continue with


no

The diagnostic procedure carried out was correct or the fault is of an intermittent nature.