b135 SUBARU TRIBECA 2009 1.G Service Workshop Manual

CC(ETC)(diag)-6
Engine Control Module (ECM) I/O Signal
CRUISE CONTROL SYSTEM (DIAGNOSTICS)
4. Engine Control Module (ECM) I/O Signal
A: ELECTRICAL SPECIFICATION
B: WIRING DIAGRAM

DescriptionTe r m i n a l
No.
Measurement Condition and I/O Signal
(Idling with ignition ON: Except cruise set light)
Main power
supply
VB (CONTROL 1)
VB (CONTROL 2)
A7
B2
•Battery voltage is present when the main power is turned ON.
•“0 V” is present when the main power is turned OFF.
Command switch B24
•“0 V” is detected when the command switch is in CANCEL position.
•“Approx. 1 V” is present when the command switch is in SET/COAST position.
•“Approx. 3 V” is detected when the command switch is in RESUME/ACCEL
position.
•“Approx. 4 V” is detected when the command switch is released.
Brake switch 1
(Brake switch)B20•Battery voltage is present when the brake pedal is released.
•“0 V” is present when brake pedal is depressed.
Brake switch 2
(Stop light switch)B28•Battery voltage is present when brake pedal is depressed.
•“0 V” is present when the brake pedal is released.
Main switch B12•“0 V” is present while the main switch is pressed or turned on.
•Battery voltage is present when the main switch is turned OFF.
GroundGND (CONTROL 1)
GND (CONTROL 2)
A5
D7—
Ignition switch B19•Battery voltage is present when the ignition switch is turned ON.
•“0 V” is present when the ignition switch is turned OFF.
Neutral signal C31•Battery voltage is present when shift lever is in other than “P” or “N” position.
•“0 V” is detected when the shift lever is in “P” or “N” position.
CC-00197
B134
9
30 29 2832 3120 19 1822 211012 11142434 3327 2617 161234567132315258
B135
9
30 29 2832312022 211012 111424353327 2617 161234567132315258
B136
9
30 29 2832 3120 19 1822 211012 11142434 3327 2616123456132315258
B137
9
29 2820 19 182221101211142417 1612345671323152581819
34
71735303127 26
To D:To C:To B:To A:

CC(ETC)(diag)-13
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
CRUISE CONTROL SYSTEM (DIAGNOSTICS)
8. Diagnostic Procedure with Diagnostic Trouble Code (DTC)
A: DTC 11, 15, 21 AND 24 CRUISE CONTROL COMMAND SWITCH
TROUBLE SYMPTOM:
•Cruise control cannot be set. (Cancelled immediately.)
•Cruise control cannot be released.
WIRING DIAGRAM:
CC-00371
ST3
SET/COASTSWITCH
RESUME/ACCELSWITCH
CANCELSWITCH
B136C:ECM
B24
2
B68
STEERINGROLL CONNECTOR
31
MAINSWITCH
541
B12C6
*
*
B21
123412131415567816171819910 1120212223 24 25 2627 28 29 3031 32 33
3534 37363938 41404342 4445 47464948 51505352 54
12345678
B68
123
ST3B136
9
302928 3231201918 22211012111424343327261612345613231525871735
C:
* :TERMINAL NO. OPTIONAL ARRANGEMENT
B122
CRUISE CONTROLCOMMAND SWITCH
B135B:
B122
12345678
B135
5672134
29
101112131415252416
30
98171819202821222332312627333435
B:

CC(ETC)(diag)-15
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
CRUISE CONTROL SYSTEM (DIAGNOSTICS)
B: DTC 12 AND 25 STOP LIGHT SWITCH AND BRAKE SWITCH
TROUBLE SYMPTOM:
•Cruise control cannot be set.
•Cruise control cannot be released.
WIRING DIAGRAM:
CC-00372
B65
MAIN SBFSBF-2 F/B NO.8
B65
4
3
1
2
B28B20
1234
SBF-8 F/B NO.4
F5
B159
F9
F:
947621538
B159F:
ECM
BATTERY
STOP LIGHT SWITCHAND BRAKE SWITCH
BRAKESWITCH
STOP SWITCH SWITCH
IGNITIONRELAY
FUSE & RELAY BOX
12
B107
B135B:
B135
5672134
29
101112131415252416
30
98171819202821222332312627333435
B:

CC(ETC)(diag)-16
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
CRUISE CONTROL SYSTEM (DIAGNOSTICS)
Step Check Yes No
1CHECK STOP LIGHT SWITCH AND BRAKE
SWITCH CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the stop light switch and brake
switch harness connector.
3) Turn the ignition switch to ON.
4) Measure the voltage between harness con-
nector terminal and chassis ground.
Connector & terminal
(B65) No. 2 (+) — Chassis ground (–):
Is the voltage more than 10 V? Go to step 2.•Check fuse No.
8 (in fuse & relay
box).
•Check for open
or short in the har-
ness between stop
light/brake switch
and fuse & relay
box.
2CHECK STOP LIGHT SWITCH AND BRAKE
SWITCH CIRCUIT.
Measure the voltage between harness connec-
tor terminal and chassis ground.
Connector & terminal
(B65) No. 4 (+) — Chassis ground (–):
Is the voltage more than 10 V? Go to step 3.•Check fuse No.
4 (in fuse & relay
box).
•Check for open
or short in the har-
ness between stop
light/brake switch
and fuse & relay
box.
3CHECK STOP LIGHT SWITCH AND BRAKE
SWITCH CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the harness connector of ECM.
3) Measure the resistance between ECM har-
ness connector terminal and stop light switch
and brake switch harness connector terminal.
Connector & terminal
(B135) No. 28 — (B65) No. 3:
(B135) No. 20 — (B65) No. 1:
Is the resistance less than 10
Ω?
Go to step 4.Repair the har-
ness.
4Check Stop Light Switch and Brake Switch
Remove and check the stop light switch and
brake switch. Brake Switch.>
Are the stop light switch and
brake switch OK?
Replace the ECM.
FU(H6DO)-32,
Engine Control
Module (ECM).>
Replace the stop
light switch and
brake switch.

CC(ETC)(diag)-19
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
CRUISE CONTROL SYSTEM (DIAGNOSTICS)
D: DTC 16 IGNITION SWITCH
TROUBLE SYMPTOM:
Cruise control cannot be set.
WIRING DIAGRAM:
CC-00374
B135
ECM
B19
B:
MAIN SBFF/B NO.12SBF-6
BATTERYIGNITIONSWITCH
B:B135
5672134
29
101112131415252416
30
98171819202821222332312627333435

CC(ETC)(diag)-20
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
CRUISE CONTROL SYSTEM (DIAGNOSTICS)
E: DTC 22 AND 32 VEHICLE SPEED SENSOR
DIAGNOSIS:
Open or short circuit in vehicle speed sensor system.
TROUBLE SYMPTOM:
Cruise control cannot be set. (Cancelled immediately.)
Step Check Yes No
1 CHECK IGNITION SWITCH CIRCUIT
1) Turn the ignition switch to OFF.
2) Disconnect the ECM harness connector.
3) Turn the ignition switch to ON.
4) Measure the voltage between harness con-
nector terminal and chassis ground.
Connector & terminal
(B135) No. 19 (+) — Chassis ground (–):
Is the voltage more than 10 V? Check poor con-
tact of ECM con-
nector.
•Check fuse No.
12 (in fuse & relay
box).
•Check the har-
ness for open or
short circuit
between ignition
switch and ECM.
Step Check Yes No
1CHECK ABS WARNING LIGHT.
1) Turn the ignition switch to ON.
2) After the initial operation of combination
meter is completed, check if the VDC warning
light continues to illuminate.
Does the VDC warning light
continue to illuminate?
Check the
VDCCM. VDC(diag)-2,
Basic Diagnostic
Procedure.>
Go to step 2.
2CHECK LAN COMMUNICATION CIRCUIT
ERROR DISPLAY
Check if the communication error is displayed
on the odo/trip meter in combination meter.
Is the error code «Er xx» dis-
played on odo/trip meter?
Check the LAN
communication cir-
cuit. LAN(diag)-2, Basic
Diagnostic Proce-
dure.>
Replace the ECM.
FU(H6DO)-32,
Engine Control
Module (ECM).>

BVC(diag)-8
Engine Control Module (ECM) I/O Signal
BRAKE VACUUM CONTROL (BVC) (DIAGNOSTICS)
5. Engine Control Module (ECM) I/O Signal
A: ELECTRICAL SPECIFICATION
DescriptionConnector
No.
Te r m i n a l
No.
Signal (V)
NOTEIgnition SW ON
(engine OFF)
Engine ON
(idling)
Brake vacuum
sensor
Signal B134 27 1 — 3.8 1 — 3.8 —
Pow er s up pl y B 1 35 2 2 5 5 —
Ground B135 30 0 0 —
Self-shutoff control B136 23 0 0 —
Brake vacuum
pump
Relay drive B136 8
10 — 13
(When the pump is OFF)
12 — 14
(When the pump is ON)—
0 (When the pump is ON) 0 (When the pump is ON)
Electric load B135 25
0 (When the pump is OFF) 0 (When the pump is OFF)
—10 — 13
(When the pump is ON)
12 — 14
(When the pump is ON)
SSM communication line B136 16 1 or less ←→ 4 or more 1 or less ←→ 4 or more —
EN-01812
B134
5678219431024 2223251112131415262728
1617181920213334 2932 3031
B136
5678219431024 2223251112131415262728
16171819202133342932303135
B135
5678219431024 2223251112131415262728
16171819202129303132333435
B137
5678219431022231112131415242526
1617181920212728293031
ToToToTo

BVC(diag)-15
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
BRAKE VACUUM CONTROL (BVC) (DIAGNOSTICS)
11.Diagnostic Procedure with Diagnostic Trouble Code (DTC)
A: DTC 11 SENSOR OUTPUT OUT OF RANGE
DTC DETECTING CONDITION:
Brake vacuum sensor malfunction
TROUBLE SYMPTOM:
Brake vacuum pump does not operate.
WIRING DIAGRAM:
BR-00528
2
1
B25B
B422
1234
B432
2
1
4
36
5
8
7
B432
SBF HOLDER
3
7
14
21
53
43
VC2
VC3
B422
B422
VC3
RELAY BOX(VACUUMPUMP RELAY)
B417
VAC U U MPUMP
26
41
B47
MAINRELAY
B411
VAC U U M S E N S O RECM
A: B134B: B135C: B136
C23B30B22A27C8312
JOINT CONNECTOR
B424
**
B417B411
213
B: C:B135
5672134
29
101112131415252416
30
98171819202821222332312627333435
B136
16101112131415252430
9871718192028212223293231
123456
2726333435
VC2
A:B134
85610 11 12 13 14 157213416
3019 20 2228 29
91718252123 24323126 2733 34
B424
34561278
(BROWN)
21
5436
B47
* : TERMINAL NO. OPTIONAL ARRANGEMENT
21
SBF-7BATTERY
30A
3412
5
8967
10131211
14

BVC(diag)-16
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
BRAKE VACUUM CONTROL (BVC) (DIAGNOSTICS)
Step Check Yes No
1CHECK BRAKE VACUUM SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the brake vacuum sensor con-
nector.
3) Remove the brake vacuum sensor. BR-40, REMOVAL, Brake Vacuum Sensor.>
4) Measure the resistance between brake
vacuum sensor connector terminals.
Te r m i n a l s
No. 1 — No. 3:
No. 2 — No. 3:
Is the resistance 15 kΩ or
less?
Go to step 2.Replace the brake
vacuum sensor.
Brake Vacuum
Sensor.>
2CHECK HARNESS BETWEEN ECM AND
BRAKE VACUUM SENSOR CONNECTOR.
1) Disconnect the connectors from ECM.
2) Measure the resistance of the harness
between ECM and the brake vacuum sensor
connector.
Connector & terminal
(B135) No. 30 — (B411) No. 1:
(B135) No. 22 — (B411) No. 3:
(B134) No. 27 — (B411) No. 2:
Is the resistance less than 1
Ω?
Go to step 3.Repair the open
circuit of harness
between ECM and
brake vacuum
sensor connector.
3CHECK HARNESS BETWEEN ECM AND
BRAKE VACUUM SENSOR CONNECTOR.
Measure the resistance of harness between
ECM and chassis ground.
Connector & terminal
(B135) No. 30 — Chassis ground:
(B135) No. 22 — Chassis ground:
(B134) No. 27 — Chassis ground:
Is the resistance more than 1
MΩ?
Go to step 4.Repair the ground
short of the har-
ness between
ECM and brake
vacuum sensor
connector.
4CHECK HARNESS BETWEEN ECM AND
BRAKE VACUUM SENSOR CONNECTOR.
Measure the voltage between ECM connector
and chassis ground.
Connector & terminal
(B135) No. 30 (+) — Chassis ground (–):
(B135) No. 22 (+) — Chassis ground (–):
(B134) No. 27 (+) — Chassis ground (–):
Is the voltage less than 0.5 V? Go to step 5.Repair the battery
short circuit
between ECM and
brake vacuum
sensor connector.
5CHECK THE BRAKE VACUUM SENSOR
POWER SUPPLY.
1) Connect the connectors to ECM and brake
vacuum sensor.
2) Turn the ignition switch to ON.
3) Measure the voltage between ECM con-
nector terminals.
Connector & terminal
(B135) No. 22 (+) — (B135) No. 30 (–):
Is the voltage 4.75 — 5.25 V? Go to step 6.Replace the ECM.
FU(H6DO)-32,
Engine Control
Module (ECM).>
6CHECK CURRENT DATA.
1) Turn the ignition switch to ON.
2) Depress the brake pedal several times, until
the pedal becomes firm.
3) Read the current data of the brake negative
pressure pump system using the Subaru
Select Monitor. Select Monitor.>
Is the atmospheric pressure —
brake booster pressure
between –8 — +8 mmHg?
Te m p o r a r y p o o r
contact occurs.
Replace the ECM.
FU(H6DO)-32,
Engine Control
Module (ECM).>

BVC(diag)-17
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
BRAKE VACUUM CONTROL (BVC) (DIAGNOSTICS)
B: DTC 12 COMPARE ERROR IN OTHER SENSOR
DTC DETECTING CONDITION:
Brake vacuum sensor malfunction
TROUBLE SYMPTOM:
Brake vacuum pump does not operate.
WIRING DIAGRAM:
BR-00528
2
1
B25B
B422
1234
B432
2
1
4
36
5
8
7
B432
SBF HOLDER
3
7
14
21
53
43
VC2
VC3
B422
B422
VC3
RELAY BOX(VACUUMPUMP RELAY)
B417
VAC U U MPUMP
26
41
B47
MAINRELAY
B411
VAC U U M S E N S O RECM
A: B134B: B135C: B136
C23B30B22A27C8312
JOINT CONNECTOR
B424
**
B417B411
213
B: C:B135
5672134
29
101112131415252416
30
98171819202821222332312627333435
B136
16101112131415252430
9871718192028212223293231
123456
2726333435
VC2
A:B134
85610 11 12 13 14 157213416
3019 20 2228 29
91718252123 24323126 2733 34
B424
34561278
(BROWN)
21
5436
B47
* : TERMINAL NO. OPTIONAL ARRANGEMENT
21
SBF-7BATTERY
30A
3412
5
8967
10131211
14