Pontiac Fiero 1988 Service Manual page 473

6E2-A-18 DRIVEABILITY AND EMISSIONS - FUEL INJECTION (TBI)
ECM
PNK
SECONDA
PNK/BLK 439
BLU 467 —
IGN
- BLK/WHT 450
BLK/RED 453
PPL/WHT 430
TAN/BLK 424
— W H T
423
PRIMARY
WINDING
WHT 121
4-30-87
DIRECT IGNITION
SYSTEM MODULE
TO I.P.
V
OR TACH '
W16 _
W1
B16 —
B9 —
W19 "~
W6
E C M
IGN
INJECTOR
DRIVER
GROUND
REFERENCE
BY-PASS
EST
7S3586
6-26-86
CHART A-3
(Page 3 of 3)
ENGINE CRANKS BUT WON'T RUN
2.5L "P" SERIES (TBI)
Circuit Description:
Ignition voltage is supplied to the fuel injector on CKT 439. The injector will be pulsed (turned "ON" and
"OFF"), when the ECM opens and grounds injector drive CKT 467.
Test Description:
Numbers below refer to circled
numbers on the diagnostic chart.
1. No blinking light indicates no ECM control of the
injector or a wiring problem.
2. There is a remote possibility that the resistance
across the injector terminals is less than 1.2 ohms
and has resulted in a blown fuse for CKT 439 in
which case the injector should be replaced.