Pontiac Fiero 1988 Service Manual page 598

DRIVEABILITY AND EMISSIONS - FUEL INJECTION (PORT) 6E3-A-15
CHART A-3
(Page 2 of 2)
ENGINE CRANKS B U T WON'T RUN
2.8L "P" SERIES (PORT)
FROM
A-3
(1 OF 2)
©
©
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NO BLINKING LIGHT AT
INJECTOR CONNECTOR
! NO LIGHT
• DISCONNECT INJECTOR HARNESS 6-WAY
CONNECTOR.
• IGNITION " O N "
• PROBE INJECTOR HARNESS TERMINALS
A & D WITH A TEST LIGHT TO GROUND.
• LIGHT SHOULD BE " O N " AT BOTH
TERMINALS.
LIGHT O N " BOTH
• RECONNECT HARNESSES
• IGNITION " O F F " .
• DISCONNECT ECM
• IGNITION " O N " .
• PROBE TERMINALS " D 1 5 " AND "D16"
IN ECM CONNECTOR WITH A TEST
LIGHT TO GROUND.
LIGHT " O N "
1
REFER TO FACING PAGE.
STEADY LIGHT
CHECK INJECTOR DRIVER CIRCUIT WITH STEADY
LIGHT FOR SHORT TO GROUND.
IF CIRCUIT IS NOT SHORTED, CHECK RESISTANCE
ACROSS EACH INJECTOR IN THE CIRCUIT.
RESISTANCE SHOULD BE GREATER THAN 10 OHMS.
OK
x z
FAULTY ECM
NOT OK
T
REPAIR SHORT TO GROUND
OR REPLACE ANY INJECTOR
THAT MEASURES UNDER 10
OHMS.
LIGHT " O F F " ONE OR BOTH
THERE SHOULD BE A LIGHT ON
BOTH TERMINALS.
IF NOT, THE PROBLEM IS AN OPEN
IN THE B + FEED TO THE
INJECTORS.
LIGHT " O F F "
1
OPEN CKT 467 OR 468
7-6-87
* 8 S 4 6 4 7 - 6 E