Purge Flow Sensor (Pfs) Inspection - Mazda B-Series 1997 Workshop Manual

FT
FUEL EVAPORATIVE EMISSION SYSTEM (FOR 2.3L 13.OL 1 4.OL)
8. Confirm all wires of PFS vehicle harness have a good
connection (i.e., at solder of Red wire). Repair as neces-
sary.
9. If vacuum and/or resistance are not as specified, replace
the PFS.
6BUOFT-221
- -
PORT
~ ~ 1 0 5 2 - E
5 6 ~ 0 ~ 3 - 1 1 5
-
4. Apply battery voltage to the evaporative emission canis-
ter purge solenoid.
5 . Verify that vacuum releases when battery voltage is
applied.
6. Measure the resistance between the terminals of the
evaporative emission canister purge solenoid.
Resistance: 30-90 ohms
7. If vacuum, operation or resistance are not as specified,
replace the evaporative emission canister purge sole-
noid.
PURGE FLOW SENSOR
(PFS)
Inspection
1. Disconnect the vacuum hoses from the PFS.
2. Plug the port leading to the evaporative emission canister
purge solenoid valve.
3. Apply 13.6 kPa (104 mmHg, 4.1 inHg} to the PFS.
4. Verify that vacuum holds.
5. Measure the resistance between PFS SIG (Pin 2 ) and
PWR GND (Pin 3) on the PFS.
Resistance: 25.65-28.35 ohms
6. Measure the resistance between PFS SIG (Pin 2) and
VPWR (Pin 1) on the PFS.
Resistance: 75-1 00 ohms
7. Measure the resistance between VPWR (Pin 1) and PWR
GND (Pin 3) on the PFS.
~ ~ 1 7 2 6 - A
Resistance: 95-1 30 ohms