Mazda B-Series 1997 Workshop Manual page 480

ON-BOARD DIAGNOSIS SYSTEM
ACTION
Go to next
step.
Start engine.
Place thumb on open end of hose
Is vacuum present7
Go to step 15.
- -
11
Key OFF. D~sconnect purge flow sensor connector.
Measure reslstance between PF SIG (p~n 2) and VPWR
(p~n 1) on sensor.
Measure reslstance between PWR GND (pln 3) and
VPWR (pln 1) on purge flow sensor.
Is reslstance greater than 250 ohms between pins 1 and 2
and greater than 280 ohms between pins
1
and 37
Key OFF.
I
Yes
'
Go to next step.
Purge flow sensor disconnected.
Install breakout box, leave PCM disconnected.
Is resistance between test pins 71 and 97 at breakout box
open in VPWR circuit.
and VPWR circuit at sensor connector less than 5.0
Go to step 15.
ohms?
Key OFF.
Disconnect purge flow sensor and EVAP canister purge
solenoid connectors.
Measure resistance between EVAP SIG and VPWR on
solenoid.
Is resistance between 30 and 90 ohms?
-- --
Key OFF.
Leave EVAP canister purge solenoid disconnected.
Install breakout box. Leave PCM disconnected.
Measure resistance between EVAP SIG test pin 67 and
VPWR test pins 71/97 at breakout box.
Is resistance greater than 10,000 ohms?
,
Yes Go to next step.
Replace solenoid.
Go to step 15.
1
Yes Replace PCM.
Go to next step.
Repair short between EiVAP SIG and VPWR
circuit.
Go to next step.
1
15
1
Perform After Reoair Procedure to ensure customer's concern has been resolved.
I
FROM POWER
RELAY
TEST PIN 71 R
- -
TEST
PIN
97
R
- -
(VIEW FROM
PIN
SIDE)