On Board Diagnostic System — Code No. 25 (PRC Solenoid Valve) / Code No. 26 (Purge Solenoid Valve)
F2-88flowchartCode No. 25 (PRC Solenoid Valve)
1
STEP 1: Disconnect connector from ECM; is battery positive voltage at ECM terminal 3M with ignition switch ON?
Yes
Does ECM terminal connector have a poor connection? If not, repair or replace ECM (see page F2-141); if it does, repair or replace connector
No
2
STEP 2: In same condition as step 1, is there battery positive voltage at PRC solenoid valve connector terminal wire?
Yes
Repair or replace wire
No
3
STEP 3: Is PRC solenoid valve OK? (see page F2-120)
No
Replace PRC solenoid valve
Yes
Look for a short or open circuit in wiring from main relay (FUEL INJ relay) to solenoid valve
Code No. 26 (Purge Solenoid Valve)
1
STEP 1: Disconnect connector from ECM. Is there battery positive voltage at ECM terminal 2O with ignition switch ON?
Yes
Does ECM terminal connector have a poor connection? If not, replace ECM (see page F2-141); if it does, repair or replace connector
No
2
STEP 2: In same condition as step 1; is there battery positive voltage at purge solenoid valve connector terminal wire?
Yes
Repair or replace wire
No
3
STEP 3: Is purge solenoid valve OK? (see page F2-128)
No
Replace purge solenoid valve
Yes
Look for a short or open circuit in wiring from the main relay (FUEL INJ relay) to the solenoid valve