ON-BOARD DIAGNOSTIC
STEP
INSPECTION ACTION
4
INSPECT PASSAGE CONTROL OF PRC
SOLENOID VALVE
• Turn ignition key to OFF.
• Disconnect PRC solenoid valve connector.
• Pump vacuum pump several times. Stop
pumping and wait a few seconds.
• Is vacuum maintained?
Yes Replace PRC solenoid valve, then go to Step 10.
No
Repair or replace harness for short to ground, then go
to Step 10.
5 INSPECT POOR CONNECTION OF PRC
SOLENOID VALVE CONNECTOR
• Turn ignition key to OFF.
• Check for poor connection (damaged,
pulled-out terminals, corrosion, etc.).
• Are there any malfunctions?
Yes Repair or replace terminal, then go to Step 10.
No Go to next step.
6 INSPECT PRC SOLENOID VALVE
• Measure resistance between PRC solenoid
valve terminals (part-side).
• Is resistance within 37 —43 £2 ?
Yes
Go to next step.
No Replace PRC solenoid valve, then go to Step 10.
7 INSPECT PRC SOLENOID VALVE POWER
SUPPLY CIRCUIT FOR OPEN
• Turn ignition key to ON (Engine OFF).
• Measure voltage between PRC solenoid
valve terminal A (harness-side) and body
ground.
• Is voltage B+?
Yes Go to next step.
No Repair or replace harness, then go to Step 10.
8 INSPECT POOR CONNECTION OF PCM
CONNECTOR
• Turn ignition key to OFF.
• Disconnect PCM connector.
• Check for poor connection (damaged,
pulled-out terminals, corrosion, etc.).
• Are there any malfunctions?
Yes Repair terminal, then go to Step 10.
No
Go to next step.
9
INSPECT PRC SOLENOID VALVE CONTROL
CIRCUIT FOR OPEN
• Connect PRC solenoid valve connector.
• Turn ignition key to ON (Engine OFF).
• Measure voltage between PCM terminal 95
and body ground.
• Is voltage B+?
Yes Go to next step.
No
Repair or replace harness, then go to next step.
10 VERIFY TROUBLESHOOTING OF DTC P1250
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Turn ignition key to OFF then ON (Engine
OFF).
• Is same DTC present?
Yes Replace PCM, then go to next step.
No Go to next step.
11 VERIFY AFTER REPAIR PROCEDURE
• Perform “After Repair Procedure.”
(See F1 36 AFTER REPAIR PROCEDURE)
• Are any DTCs present?
Yes Go to applicable DTC inspection.
(See F1-37 DTC TABLE)
No Troubleshooting completed.
F1-69
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