1996 SUBARU LEGACY warning

B4M0715A
1. CHECK TCS WARNING LIGHT.
1) Turn ignition switch OFF.
2) Disconnect all connectors from ABS/TCS control mod-
ule.
3) Turn ignition switch ON.
4) Measure voltage between ABS/TCS control module
connector and body.
Connector & terminal / Specified voltage:
(P6) No. 3 — body / 10 — 14 V
B4M0387A
2. CHECK DIAGNOSIS TERMINAL.
1) Turn ignition switch OFF.
2) Measure resistance between diagnosis terminal and
body.
Connector/Specified resistance:
B81 — body / 0Ω
B4M0388A
3. CHECK DIAGNOSIS CONNECTOR.
1) Turn ignition switch OFF.
2) Disconnect all connectors from ABS/TCS control mod-
ule.
3) Measure resistance between diagnosis connector and
body.
Connector & terminal / Specified resistance:
(B82) No. 4 — body / 0Ω
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7. Diagnostics Chart for Warning Light Circuit Failure

B: ABS AND TCS WARNING LIGHT DO NOT
GO OFF.
—TCS OFF AND TCS OPERATING
INDICATOR LIGHTS COME ON AND GO OFF
PROPERLY WHEN STARTING THE ENGINE,
WHILE ABS WARNING AND TCS WARNING
LIGHTS KEEP ON.—
1. Check brake fluid level.
OK
Not OK
Add to brake fluid.
2. Check brake fluid level sensor.
OK
Not OK
Replace master cylinder.
3. Check harness connector between ABS/TCS
control module and alternator.
OK
Not OK
Replace harness connector.
Replace ABS/TCS control module.
B4M0389



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7. Diagnostics Chart for Warning Light Circuit Failure

1. CHECK BRAKE FLUID LEVEL.
Check that brake fluid level is above the MIN indication on
the reservoir tank.
B4M0716A
2. CHECK BRAKE FLUID LEVEL SENSOR.
1) Turn ignition switch OFF.
2) Disconnect connector from brake fluid level sensor.
Connector & terminal / Specified resistance:
(B16) No. 1—No.2/0Ω(Leaving float where it
is.)
(B16) No. 1—No.2/1MΩ(When pushing float
down.)
B4M0717A
3. CHECK HARNESS CONNECTOR BETWEEN ABS/
TCS CONTROL MODULE AND ALTERNATOR.
1) Turn ignition switch OFF.
2) Connect connector from brake fluid level sensor.
3) Disconnect all connectors from ABS/TCS control mod-
ule.
4) Measure voltage between ABS/TCS control module
connector and body.
Connector & terminal / Specified voltage:
(P7) No. 20—body/2Vorless
5) Start the engine.
6) Measure voltage between ABS/TCS control module
connector and body.
Connector & terminal / Specified voltage:
(P7) No. 20—body / 10—14 V
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7. Diagnostics Chart for Warning Light Circuit Failure

C: TCS WARNING LIGHT AND TCS
INDICATOR OFF AND TCS OPERATING
INDICATOR LIGHTS COME ON AND GO OFF
PROPERLY, WHILE ABS WARNING LIGHT
DOES NOT GO OFF.
—TCS WARNING LIGHT AND TCS OFF
INDICATOR AND TCS OPERATING
INDICATOR LIGHTS COME ON AND GO OFF
PROPERLY WHEN STARTING THE ENGINE,
WHILE ABS WARNING LIGHT DOES NOT GO
OFF.—
1. Check harness connector between ABS/TCS
control module and ABS warning light.Repair harness connector.
Replace ABS/TCS control module.
B4M0392

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7. Diagnostics Chart for Warning Light Circuit Failure

B4M0393A
1. CHECK HARNESS CONNECTOR BETWEEN ABS/
TCS CONTROL MODULE AND ABS WARNING LIGHT.
1) Turn ignition switch OFF.
2) Disconnect connector from ABS/TCS control module
and TCS valve relay.
3) Measure resistance between ABS/TCS control module
connector and body.
Connector & terminal / Specified resistance:
(P6) No. 2—body/1MΩor more
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7. Diagnostics Chart for Warning Light Circuit Failure

D: ABS WARNING LIGHT ONLY REMAINS
ILLUMINATED.
—WHEN STARTING THE ENGINE, NEITHER
TCS WARNING, TCS OFF INDICATOR NOR
TCS OPERATING INDICATOR LIGHT COMES
ON EVEN ONCE, AND ABS WARNING LIGHT
AND MALFUNCTION INDICATOR LAMP
ILLUMINATE.—
1. Check input voltage of ABS/TCS control mod-
ule.
OK
Not OK
Repair harness/connector.
Replace ABS/TCS control module.
B4M0394

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7. Diagnostics Chart for Warning Light Circuit Failure

B4M0395A
1. CHECK INPUT VOLTAGE OF ABS/TCS CONTROL
MODULE.
1) Turn ignition switch OFF.
2) Disconnect connector from ABS/TCS control module.
3) Turn ignition switch ON.
4) Measure voltage between ABS/TCS control module
connector and body.
Connector & terminal / Specified voltage:
(P5) No. 1—body / 10—13 V
NOTE:

When ABS/TCS control module is defective, the same
condition occurs.

Confirm that ABS/TCS control module is installed.
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7. Diagnostics Chart for Warning Light Circuit Failure

E: TCS OFF INDICATOR LIGHT DOES NOT
GO OFF.
—ABS WARNING, TCS WARNING AND TCS
OPERATING INDICATOR LIGHTS COME ON
AND GO OFF PROPERLY WHEN STARTING
THE ENGINE, BUT TCS OFF INDICATOR
DOES NOT GO OFF FOR MORE THAN 30
SECONDS AFTER ENGINE RUNNING.—
Does malfunction indicator lamp (Check engine
lamp) come on?
No
Ye s
Conduct OBD II diagnosis.

1. Check harness connector between ABS/TCS
control module and TCS OFF indicator light.
OK
Not OK
Repair harness/connector.
Replace ABS/TCS control module.
B4M0396


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7. Diagnostics Chart for Warning Light Circuit Failure