Pontiac Fiero 1988 Service Manual page 655

6E3-C1-6 DRIVEABILITY A N D EMISSIONS - FUEL INJECTION (PORT)
Remove or Disconnect
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1. Negative battery cable.
2. Refer to Section "C8" for removal of console cover.
3. ECM from bracket.
4. ECM connectors.
Install or Connect
1. Connector on ECM.
2. ECM on bracket.
3. Console cover.
4. Negative battery cable.
PROM/CALPAK
Code 51 indicates a faulty programmable read
only memory (PROM), bent pins, or incorrect
installation.
Important
It is possible to install a PROM backwards. If the
PROM is installed backwards and the ignition key
turned to "ON," the PROM circuitry will be destroyed,
requiring PROM replacement.
NOTICE:
The ignition should always be "OFF"
when installing or removing the ECM
connectors.
R H
E C M
[~2~1 P R O M C A R R I E R
fTI
E C M H A R N E S S
C O N N E C T O R S T O E C M
P R O M A C C E S S C O V E R
4S 1195-6E
Figure
C1-8
PROM
Access Cover
|4"»| Remove or Disconnect
1. Connectors from ECM.
2. ECM mounting hardware.
3. ECM from passenger compartment.
4. ECM access cover (see Figure Cl-8).
5. Remove PROM assembly.
Important
Using the rocker-type PROM removal tool, engage
one end of the PROM carrier with the hook end of the
tool (see Figure Cl-9). Press on the vertical bar end of
the tool and rock the engaged end of the PROM carrier
up as far as possible. Engage the opposite end of the
PROM carrier in the same manner and rock this end
up as far as possible. Repeat this process until the
PROM carrier and PROM are free of the PROM
socket. The PROM carrier with PROM in it should lift
off of the PROM socket easily. PROM carrier should
only be removed by using the pictured PROM removal
tool. Other methods could cause damage to the PROM
or PROM socket.
IT1 P R O M C A R R I E R
flTI
P R O M R E M O V A L T O O L
4S 0464-6E
Figure C1-9
PROM Removal Tool
]& Inspect
1. New PROM for same part number as old.
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Important
Do not remove PROM from carrier to check PROM
number.
2. For correct reference of PROM in carrier, Figure
Cl-10
3. Using the removal tool, pictured in Figure Cl-11
grasp the CALPAK carrier at the narrow ends.
Gently rock the carrier from end to end while
applying a firm upward force and remove the
CALPAK and carrier. Use of unapproved
CALPAK removal tools or methods will cause
damage to the CALPAK or CALPAK socket.