1996 SUBARU LEGACY warning light

B4M0719A
1. CHECK HARNESS CONNECTOR BETWEEN ABS/
TCS CONTROL MODULE AND TCS OPERATING
INDICATOR 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. 11—body / 10—13 V
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7. Diagnostics Chart for Warning Light Circuit Failure

G: TCS OFF SWITCH DOES NOT FUNCTION.
—TCS OFF INDICATOR LIGHT COMES ON
AND GOES OFF PROPERLY WHEN
STARTING THE ENGINE, WHILE THIS LIGHT
NEITHER COMES ON NOR GOES OFF WHEN
PUSHING THE TCS OFF SWITCH.—
1. Check TCS OFF switch
OK
Not OK
Replace TCS OFF switch.
2. Check harness connector between ABS/TCS
control module and TCS OFF switch.
OK
Not OK
Repair harness/connector.
Replace ABS/TCS control module.
B4M0535


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7. Diagnostics Chart for Warning Light Circuit Failure

B4M0720A
1. CHECK TCS OFF SWITCH.
1) Turn ignition switch OFF.
2) Disconnect connector from TCS OFF switch.
3) Measure resistance between TCS OFF switch termi-
nals.
Connector & terminal / Specified resistance:
(i9) No. 5—No.3/1Ωor less
(When the switch is pressed,
turns ON.)
/1MΩor less
(When the switch is released,
turns OFF.)
B4M0401A
2. CHECK HARNESS CONNECTOR BETWEEN ABS/
TCS CONTROL MODULE AND TCS OFF SWITCH.
1) Turn ignition switch OFF.
2) Disconnect connector to TCS OFF switch.
3) Disconnect connector from ABS/TCS control module.
4) Measure resistance between ABS/TCS control module
connector terminals.
Connector & terminal / Specified resistance:
(P7) No. 16—body / 1Ωor less (When the switch
is pressed, turns ON.)
/1MΩor more (When the
switch is released, turns OFF.)
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7. Diagnostics Chart for Warning Light Circuit Failure

H: ABS WARNING, TCS WARNING, TCS
OPERATING INDICATOR AND/OR TCS OFF
INDICATOR LIGHTS DO NOT COME ON.
—TROUBLE IN WARNING LIGHT DRIVE
CIRCUIT—
DIAGNOSIS:

Faulty ABS warning light

Faulty TCS warning light

Faulty TCS OFF light

Faulty TCS operating indicator light

Faulty harness connector

Faulty ABS/TCS control module
TROUBLE SYMPTOM:

Warning light does not illuminate.

Impossible to read trouble code.
Check warning light bulb.
OK
Not OK
Repair warning light bulb.
1. Check warning light power supply.
OK
Not OK
Repair ABS warning light power line.
2. Check input voltage of ABS/TCS control mod-
ule.
OK
Not OK
Repair harness/connector.
3. Check ground line of ABS/TCS control mod-
ule.
OK
Not OK
Repair ground line.
Replace ABS/TCS control module.




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7. Diagnostics Chart for Warning Light Circuit Failure

B4M0402
B4M0403A
1. CHECK WARNING LIGHT POWER SUPPLY.
1) Turn ignition switch OFF.
2) Disconnect combination meter.
3) Turn ignition switch ON.
4) Measure voltage between combination meter connector
and body.
Connector & terminal / Specified voltage:
(i14) No. 11—body / 10—13 V
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7. Diagnostics Chart for Warning Light Circuit Failure

B4M0404A
2. CHECK INPUT VOLTAGE OF ABS/TCS CONTROL
MODULE.
1) Turn ignition switch OFF and connect combination
meter connector.
2) Disconnect all connectors from ABS/TCS control mod-
ule.
3) Remove ABS/TCS valve relay.
4) Turn ignition switch ON.
5) Measure voltage between ABS/TCS control module and
body.
Connector & terminal / Specified voltage:
ABS warning:
(P6) No. 2—body / 10—13 V
TCS warning:
(P6) No. 3—body / 10—13 V
TCS operation:
(P6) No. 11—body / 10—13 V
TCS OFF:
(P6) No. 10—body / 10—13 V
B4M0405A
3. CHECK GROUND LINE OF ABS/TCS CONTROL
MODULE.
Measure resistance between ABS/TCS control module and
body.
Connector & terminal / Specified resistance:
(P4) No. 6—body / 1Ωor less
(P5) No. 5—body / 1Ωor less
(P7) No. 15—body / 1Ωor less
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7. Diagnostics Chart for Warning Light Circuit Failure

K: TROUBLE CODE 54
—FAULTY STROKE SENSOR AND/OR STOP
LIGHT SWITCH—
DIAGNOSIS:

Faulty stroke sensor

Faulty stop light switch

Faulty pump unit in hydraulic unit

Faulty ABS/TCS control module

Faulty harness/connector
TROUBLE SYMPTOM:

ABS and TCS do not operate.

No kick-back ocuurs while ABS is functioning.

Only when the stop light switch circuit is broken, the ABS
functions while TCS does not. (TCS warning light only illu-
minates.)
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8. Diagnostics Chart with Trouble Code

2. FA MODE (ON/OFF DATA ARE DISPLAYED.)
If the system is in normal condition with the engine run at
idle speed (when the brake pedal is off), the LED of EC
(AEC signal) of FA2 will come on, the LED of EM (EAM
signal) blink and all other LED’s go out.
Function code
Measuring
itemsContents to be monitored Scroll Ref. to 4-4b
Code Abbreviation
FA 0OF OFF.SW LED 1 comes on with the OFF switch on.
Possible [T9H0] B1Stop light
switchLED 2 comes on with the switch on (with the brake
pedal down).
VRValve relay
signalLED 3 comes on with the valve relay off.
VMValve relay
monitorLED 4 comes on with the valve relay off.
MRMotor relay
signalLED 5 comes on with the motor on.
MS Motor sensor LED 6 comes on with the motor on.
FSFluid level
sensorLED 7 comes on with the sensor on (the fluid level
is lowered).
FA 1FI FR.IN valveLED 1 comes on when the FR.IN valve is operat-
ing.
Possible [T9I0] RO FR.OUT valveLED 2 comes on when the FR.OUT valve is operat-
ing.
FL FL.IN valve LED 3 comes on when the FL.IN valve is operating.
LO FL.OUT valveLED 4 comes on when the FL.OUT valve is operat-
ing.
T1 TCS1 valve LED 5 comes on when the TCS1 valve is operating.
RI RR.IN valveLED 6 comes on when the RR.IN valve is operat-
ing.
RO RR.OUT valveLED 7 comes on when the RR.OUT valve is operat-
ing.
RI RL.IN valve LED 8 comes on when the RL.IN valve is operating.
LO RL.OUT valveLED 9 comes on when the RL.OUT valve is operat-
ing.
T2 TCS2 valveLED 10 comes on when the TCS2 valve is operat-
ing.
FA 2AWABS warning
lightLED 1 comes on when the warning light is on.
Possible [T9J0] TWTCS warning
lightLED 2 comes on when the warning light is on.
TOTCS OFF
indicator lightLED 3 comes on when the indicator light is on.
TITCS operation
indicator lightLED 4 comes on when the indicator light is on.
EC AEC signalWith the engine run at idle speed, LED 6 (AEC)
comes on and LED 7 (AEB) goes out (They go on
and off depending on the behavior of a vehicle.) EB AEB signal
ET AET signal LED 8 comes on with the TCS control on.
EM EAM signalLED 9 comes on or blinks when the engine control
is enabled.
AT AAT signal LED 10 comes on when ABS control is on.
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9. Select Monitor Function Mode