SUBARU LEGACY 1997 Service Repair Manual

B2M0931A
4) Measure resistance of harness between ECM and fuel
tank pressure control solenoid valve connector.
: Connector & terminal
(B84) No. 10—(R68) No. 2:
Is the voltage less than 1Ω?
: Go to step11CI3.
: Repair harness and connector.
NOTE:
In this case, repair the following:

Open circuit in harness between ECM and fuel tank
pressure control solenoid valve connector

Poor contact in coupling connectors (B97 and R57)
B2M0929
11CI3CHECK FUEL TANK PRESSURE CON-
TROL SOLENOID VALVE.
Measure resistance between fuel tank pressure control
solenoid valve terminals.
: Terminals
No. 1—No. 2:
Is the resistance between 10 and 100Ω?
: Go to step11CI4.
: Replace fuel tank pressure control solenoid valve.
530
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

B2M0932A
11CI4CHECK POWER SUPPLY TO FUEL TANK
PRESSURE CONTROL SOLENOID
VA LV E .
1) Turn ignition switch to ON.
2) Measure voltage between fuel tank pressure control
solenoid valve and chassis ground.
: Connector & terminal
(R68) No. 1 (+)—Chassis ground ():
Is the voltage more than 10 V?
: Go to next.
: Repair harness and connector.
NOTE:
In this case, repair the following:

Open circuit in harness between main relay and fuel tank
pressure control solenoid valve connector

Poor contact in coupling connectors (B97 and R57)

Poor contact in main relay connector
: Is there poor contact in fuel tank pressure
control solenoid valve connector?
: Repair poor contact in fuel tank pressure control
solenoid valve connector.
: Contact with SOA service.
NOTE:
Inspection by DTM is required, because probable cause is
deterioration of multiple parts.
531
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

B2M1131
CJ: DTC P1420
—FUEL TANK PRESSURE CONTROL
SOLENOID VALVE CIRCUIT HIGH INPUT—
DTC DETECTING CONDITION:

Two consecutive driving cycles with fault
WIRING DIAGRAM:
B2M1154
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
<Ref. to 2-7 [T3D0] and [T3E0].>
532
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

H2M1408B
11CJ1
CHECK OUTPUT SIGNAL FROM ECM.
1) Turn ignition switch to ON.
2) Measure voltage between ECM and chassis ground.
: Connector & terminal
(B84) No. 10 (+)—Chassis ground ():
Is the voltage more than 10 V?
: Go to step11CJ2.
: Go to next.
: Is there poor contact in ECM connector?
: Repair poor contact in ECM connector.
: Replace ECM.
H2M1408B
11CJ2CHECK HARNESS BETWEEN FUEL
TANK PRESSURE CONTROL SOLENOID
VALVE AND ECM CONNECTOR.
1) Turn ignition switch to OFF.
2) Disconnect connector from fuel tank pressure control
solenoid valve.
3) Turn ignition switch to ON.
4) Measure voltage between ECM and chassis ground.
: Connector & terminal
(B84) No. 10 (+)—Chassis ground ():
Is the voltage more than 10 V?
: Repair battery short circuit in harness between
ECM and fuel tank pressure control solenoid
valve connector. After repair, replace ECM.
: Go to next step 5).
533
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

B2M0929
5) Turn ignition switch to OFF.
6) Measure resistance between fuel tank pressure control
solenoid valve terminals.
: Terminals
No. 1—No. 2:
Is the resistance less than 1Ω?
: Replace fuel tank pressure control solenoid valve
and ECM.
: Go to next.
: Is there poor contact in ECM connector?
: Repair poor contact in ECM connector.
: Replace ECM.
534
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

B2M1132
CK: DTC P1421
—EXHAUST GAS RECIRCULATION CIRCUIT
HIGH INPUT—
WIRING DIAGRAM:
B2M0793
NOTE:
Check exhaust gas recirculation control solenoid valve cir-
cuit.
<Ref. to 2-7 [T10CN0].>
535
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

B2M1133
CL: DTC P1422
—EVAPORATIVE EMISSION CONTROL
SYSTEM PURGE CONTROL VALVE CIRCUIT
HIGH INPUT—
WIRING DIAGRAM:
B2M0795
NOTE:
Check canister purge control system.
<Ref. to 2-7 [T10CO0].>
536
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

B2M1134
CM: DTC P1423
—EVAPORATIVE EMISSION CONTROL
SYSTEM VENT CONTROL HIGH INPUT—
DTC DETECTING CONDITION:

Two consecutive driving cycles with fault
WIRING DIAGRAM:
B2M1155
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
<Ref. to 2-7 [T3D0] and [T3E0].>
537
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

H2M1370B
11CM1
CHECK OUTPUT SIGNAL FROM ECM.
1) Turn ignition switch to ON.
2) Measure voltage between ECM and chassis ground.
: Connector & terminal
(B84) No. 35 (+)—Chassis ground ():
Is the voltage more than 10 V?
: Go to step11CM2.
: Go to next.
: Is there poor contact in ECM connector?
: Repair poor contact in ECM connector.
: Replace ECM.
H2M1370B
11CM2CHECK HARNESS BETWEEN VENT
CONTROL SOLENOID VALVE AND ECM
CONNECTOR.
1) Turn ignition switch to OFF.
2) Disconnect connector from vent control solenoid valve.
3) Turn ignition switch to ON.
4) Measure voltage between ECM and chassis ground.
: Connector & terminal
(B84) No. 35 (+)—Chassis ground ():
Is the voltage more than 10 V?
: Repair battery short circuit in harness between
ECM and vent control solenoid valve connector.
After repair, replace ECM.
: Go to next step 5).
538
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

H2M1238A
5) Turn ignition switch to OFF.
6) Measure resistance between vent control solenoid
valve terminals.
: Terminals
No. 1—No. 2:
Is the resistance less than 1Ω?
: Replace vent control solenoid valve and ECM.
: Go to next.
: Is there poor contact in ECM connector?
: Repair poor contact in ECM connector.
: Replace ECM.
539
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles