2009 SUBARU TRIBECA brake light

VDC(diag)-33
Warning Light Illumination Pattern
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Step Check Yes No
1CHECK INSTALLATION OF VDCCM&H/U
CONNECTOR.
1) Turn the ignition switch to OFF.
2) Check that the VDCCM&H/U connector is
inserted until it is locked by clamp.
Is the connector firmly
inserted?
Go to step 2.Insert the
VDCCM&H/U con-
nector until it is
locked by clamp.
2READ DTC.
Read the DTC. Diagnostic Trouble Code (DTC).>
Is DTC displayed? Perform the diag-
nosis according to
DTC.
Go to step 3.
3CHECK BRAKE FLUID AMOUNT.
Check the amount of brake fluid in the reser-
voir tank of master cylinder.
Is the amount of brake fluid
between the lines of “MAX”
and “MIN”?
Go to step 4.Replenish brake
fluid to the speci-
fied value.
4CHECK BRAKE FLUID LEVEL SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the level switch connector (B16)
from master cylinder.
3) Measure the resistance of master cylinder
terminals.
Te r m i n a l s
No. 1 — No. 2:
Is the resistance more than 1
MΩ?
Go to step 5.Replace the mas-
ter cylinder.
5CHECK PARKING BRAKE SWITCH.
1) Disconnect the connector (B404) from
parking brake switch.
2) Release the parking brake.
3) Measure the resistance between parking
brake switch terminal and chassis ground.
Is the resistance more than 1
MΩ?
Go to step 6.Replace the park-
ing brake switch.
6CHECK GROUND SHORT OF HARNESS.
1) Disconnect the connector (i11) from combi-
nation meter.
2) Measure the resistance between combina-
tion meter connector and chassis ground.
Connector & terminal
(i11) No. B8 — Chassis ground:
Is the resistance more than 1
MΩ?
Go to step 7.Repair the har-
ness connector
between combina-
tion meter brake
fluid level switch
and parking brake
switch.
7CHECK HARNESS CONNECTOR.
1) Disconnect the connector (B310) from the
VDCCM&H/U.
2) Disconnect the connector (i11) from combi-
nation meter.
3) Measure the resistance between
VDCCM&H/U connector and combination
meter connector.
Connector & terminal
(B310) No. 3 — (i11) No. B8:
Is the resistance less than 0.5
Ω?
Go to step 8.Repair the har-
ness connector
between
VDCCM&H/U and
combination
meter.
8CHECK POOR CONTACT IN CONNECTOR.
Check poor contact in all connectors.
Is there poor contact? Repair the con-
nector.
Go to step 9.
9CHECK VDCCM.
1) Connect the connector (B310) to
VDCCM&H/U.
2) Turn the ignition to ON.
3) Measure the resistance between combina-
tion meter connector and chassis ground.
Connector & terminal
(i11) No. B8 — Chassis ground:
Is the resistance less than 0.5
Ω?
Check the combi-
nation meter.
Replace the
VDCCM&H/U.

VDC(diag)-36
List of Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
C0052
4521Motor relay system
open line
Motor / motor relay sys-
tem open line
MOTOR RELAY SYSTEM OPEN LINE, Diagnos-
tic Procedure with Diagnostic Trouble Code
(DTC).>
4522Motor relay system
short
Motor / motor relay sys-
tem short
MOTOR RELAY SYSTEM SHORT, Diagnostic
Procedure with Diagnostic Trouble Code (DTC).>
4523Motor system not run-
ning
Motor system not run-
ning
SYSTEM NO ROTATION, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>
4524 Motor systemMotor system malfunc-
tion
SYSTEM MALFUNCTION, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>
4525Motor fail safe system
short
Motor fail safe system
short
SAFE RELAY SHORT CIRCUIT, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>
C0054 4541Brake light switch open
line
Brake light switch open
line
LIGHT SWITCH OPEN LINE, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>
C0056
4561G Sensor Output Sei-
zureG sensor output seizure
OUTPUT SEIZURE, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
4562 G sensor signalG sensor signal mal-
function
SIGNAL MALFUNCTION, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>
4563Ya w G s e n s o r p o w e r
voltage
Fau l t y yaw ra te & la t era l
G sensor power supply
voltage
G SENSOR POWER SUPPLY VOLTAGE MAL-
FUNCTION, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>
4564 G sensor outputDefective G sensor out-
put
OUTPUT MALFUNCTION, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>
C565G sensor communica-
tion
Defective G sensor
communication
G SENSOR COMMUNICATION, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>
4566 G sensor inside Defect inside G sensor
INSIDE G SENSOR, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
C0057
C571ECM communication
circuit
ECM communication
circuit
MUNICATION, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>
C573TCM communication
circuit
TCM communication
circuit
NICATION, Diagnostic Procedure with Diagnostic
Tr o u b l e C o d e ( D T C ) . >
4574 Transmission systemTr a n s m i s s i o n s y s t e m
malfunction
SION SYSTEM MALFUNCTION, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>
DTCDetailed
codeDisplay Content of diagnosis Reference target

VDC(diag)-66
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
AG:DTC C0054 BRAKE LIGHT SWITCH OPEN LINE
DTC DETECTING CONDITION:
Defective stop light switch
TROUBLE SYMPTOM:
•ABS does not operate.
•VDC does not operate.
WIRING DIAGRAM:
MAIN SBF
SBF-2
NO.8
B310
B159
E
18
VDCCM & H/U
B65
B65B159
59
32
947621538
BATTERY
STOP LIGHTSWITCH
1234
B310
1234
1516171819202122232425262728293031323334353637383940414245464344568910 11 12 13 147
VDC00374

VDC(diag)-67
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Step Check Yes No
1CHECK OUTPUT OF STOP LIGHT SWITCH
WITH SUBARU SELECT MONITOR.
1) Select {Current Data Display & Save} in
Subaru Select Monitor.
2) Release the brake pedal.
3) Read the stop light switch output in Subaru
Select Monitor.
Is OFF displayed on the dis-
play screen?
Go to step 2.Go to step 3.
2CHECK OUTPUT OF STOP LIGHT SWITCH
WITH SUBARU SELECT MONITOR.
1) Depress the brake pedal.
2) Read the stop light switch output in Subaru
Select Monitor.
Is ON displayed on the display
screen?
Go to step 5.Go to step 3.
3CHECK IF STOP LIGHTS COME ON.
Depress the brake pedal.
Does the stop light illuminate? Go to step 4.Repair the stop
light circuit.
4CHECK OPEN CIRCUIT OF HARNESS.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from the
VDCCM&H/U.
3) Depress the brake pedal.
4) Measure the voltage between VDCCM&H/
U connector and chassis ground.
Connector & terminal
(B310) No. 18 (+) — Chassis ground (–):
Is the voltage 10 — 15 V? Go to step 5.Repair the har-
ness between stop
light switch and
VDCCM&H/U con-
nector.
5CHECK POOR CONTACT OF CONNEC-
TORS.
Is there poor contact in con-
nector between stop light
switch and VDCCU&H/U?
Go to step 6.Repair the con-
nector.
6CHECK THE VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
Is the same DTC displayed? Replace the
VDCCM&H/U.
VDC Control Mod-
ule & Hydraulic
Control Unit
(VDCCM&H/U).>
Go to step 7.
7CHECK OTHER DTC DETECTION.Is any other DTC displayed? Perform the diag-
nosis according to
DTC.
Te m p o r a r y p o o r
contact occurs.

VDC(diag)-84
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
BB:DTC C0074 PRESSURE SENSOR 0 POINT
DTC DETECTING CONDITION:
Defective pressure sensor
TROUBLE SYMPTOM:
•ABS does not operate.
•VDC does not operate.
Step Check Yes No
1CHECK OUTPUT OF STOP LIGHT SWITCH
WITH SUBARU SELECT MONITOR.
1) Select {Current Data Display & Save} in
Subaru Select Monitor.
2) Release the brake pedal.
3) Read the stop light switch output in Subaru
Select Monitor.
Is OFF displayed on the dis-
play screen?
Go to step 2.Go to step 3.
2CHECK OUTPUT OF STOP LIGHT SWITCH
WITH SUBARU SELECT MONITOR.
1) Depress the brake pedal.
2) Read the stop light switch output in Subaru
Select Monitor.
Is ON displayed on the display
screen?
Go to step 4.Go to step 3.
3CHECK IF STOP LIGHTS COME ON.
1) Depress the brake pedal.
Does the stop light illuminate? Go to step 4.Repair the stop
light circuit.
4CHECK PRESSURE SENSOR.
1) Depress the brake pedal.
2) Read the pressure sensor output using the
Subaru Select Monitor.
Do the output values on the
monitor display change when
the pedal is depressed?
Go to step 5.Replace the
VDCCM&H/U.
VDC Control Mod-
ule & Hydraulic
Control Unit
(VDCCM&H/U).>
5CHECK THE VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
Is the same DTC displayed? Replace the
VDCCM&H/U.
VDC Control Mod-
ule & Hydraulic
Control Unit
(VDCCM&H/U).>
Go to step 6.
6CHECK OTHER DTC DETECTION.Is any other DTC displayed? Perform the diag-
nosis according to
DTC.
Te m p o r a r y p o o r
contact occurs.

VDC(diag)-89
General Diagnostic Table
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Po or ch a ng e -
direction-opera-
tion stability of
TCS
Deviation to
right or left
direction
•VDCCM&H/U
•Defective ABS wheel speed sensor or sensor
gap
•Defective steering angle sensor or improper
neutral position
•Defective yaw rate & G sensor or improper
installation
•Brake caliper
•Brake pad
•Wheel alignment
•Road surface (uneven)
•Road with crowns or banks
•Tire specifications, tire wear and air pressures
•Incorrect wiring or piping connections
•Disc rotor
•Brake pipe
•Axle and wheels
•Suspension play or fatigue (poor damp-
ing)
Ve h i c l e s p i n • V D C C M & H / U
•Defective ABS wheel speed sensor or sensor
gap
•Defective steering angle sensor or improper
neutral position
•Defective yaw rate & G sensor or improper
installation
•Brake pad
•Tire specifications, tire wear and air pressures
•Incorrect wiring or piping connections
•Brake caliper
•Brake pipe
Steering wheel drag while driving • VDCCM&H/U
•Defective ABS wheel speed sensor or sensor
gap
•Defective steering angle sensor or improper
neutral position
•Defective yaw rate & G sensor or improper
installation
•Incorrect wiring or piping connections
•Power steering system
•Brake caliper
•Brake pad
•Disc rotor
•Wheel alignment
•Road surface (uneven)
•Road with crowns or banks
•Suspension play or fatigue (poor damp-
ing)
•Tire specifications, tire wear and air
pressures
VDC operates while driving nor-
mally.
•VDCCM&H/U
•Defective ABS wheel speed sensor or sensor
gap
•Defective steering angle sensor or improper
neutral position
•Defective yaw rate & G sensor or improper
installation
•Wheel alignment
•Road surface (uneven)
•Road with crowns or banks
•Suspension play or fatigue (poor damping)
•Tire specifications, tire wear and air pressures
•Incorrect wiring or piping connections
•Power steering system

TCS OFF indicator light does not
come on when the TCS OFF
switch is depressed.
NOTE:When pressing TCS OFF switch
for more than 10 seconds, TCS
OFF indicator light goes off and
cannot operate any more. When
turning the ignition switch from
OFF to ON, the previous status is
restored.
•Harness
•Indicator light bulb
•TCS OFF switch

Symptom Main probable cause Other probable cause

VDC-11
VDC Control Module & Hydraulic Control Unit (VDCCM&H/U)
VEHICLE DYNAMICS CONTROL (VDC)
D: ADJUSTMENT
When the following replacement, removal and in-
stallation are performed, be sure to perform center-
ing of the steering angle sensor and zero point
setting of the yaw rate & G sensor.
•VDCCM&H/U
•Steering angle sensor
•Yaw rate & lateral G sensor
•Steering wheel parts (Including airbag)
•Suspension parts
•Wheel alignment adjustment
1) Park the vehicle straight on a level surface. (En-
gine operation in the “P” or “N” range)
2) Check that steering wheel is positioned at the
center. (When the center position is not correct, ad-
just the wheel alignment.)
3) Set the Subaru Select Monitor to the vehicle,
and select {Set up mode for Neutral of Steering An-
gle Sensor & Lateral G Sensor 0 point} in the
“Function check sequence” screen. (Follow the
procedures shown in the display.)
4) On the “Brake Control System” display screen,
select {Current Data Display & Save}, and check
that the steering angle sensor shows “0 deg”.
5) When the “0 deg” is not displayed, repeat the
above steps and check that the “0 deg” is dis-
played.
6) Drive the vehicle for 10 minutes, and check that
the ABS and VDC warning light is not illuminated.
7) Check that there is no unnecessary VDC opera-
tion or steering control loss. If there is a problem,
repeat the steps above.

VDC-14
ABS Sequence Control
VEHICLE DYNAMICS CONTROL (VDC)
NOTE:
The control operation starts from point A.
B: SPECIFICATION
1. ABS SEQUENCE CONTROL COMPLETE
CONDITION
When the following conditions develop, the ABS
sequence control stops and ABS operation is re-
turned to the normal control mode.
1) When the speed of at least one wheel reaches
10 km/h (6 MPH).
2) When the brake pedal is released during ABS
sequence control and the stop lamp switch is be-
comes OFF.
3) After completion of ABS sequence control.
4) When a malfunction is detected.
(1) All wheel speed (10) RR decompression valve (18) 1.0 seconds
(2) Ignition key (11) RR hold valve (19) 1.4 seconds
(3) ABS warning light (12) RL decompression valve (20) 0.6 seconds
(4) Stop light switch (13) RL hold valve (21) 0.4 seconds
(5) Valve relay (14) Pump motor (22) Point A
(6) FL decompression valve (15) 1.5 seconds (23) Reset
(7) FL hold valve (16) Light OFF (24) Linear valve 1
(8) FR decompression valve (17) Light ON (25) Linear valve 2
(9) FR hold valve