Daihatsu F300 Service Manual page 1400

EFISYSTEM
TROUBLE SHOOTING WITH VOLT/
OHMMETER
PREPARATION OF TROUBLE SHOOTING
1. DisconneC1 the battery ground cable from the negative (-)
terminal of the battery.
2. Remove the ECU cover.
3. Disconnect the engine harness from ECU.
4. Connect ttle following SST between the engine wire and the
ECU.
SST:
09842-87204-000
5. Reconnec: the battery ground cable to the negative(-) terminal of the battery.
CAUTION:
• After completion of the inspection, before the SST is removed, be sure to disconneC1 the battery ground
cable from the negative(-) terminal of the battery.
After the engine harness has been connected to the ECU, reconnect the battery ground cable to the
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negative (-)terminal of the battery. •
• Before using the SST, be sure to check to see if short or open wire exists between the terminals.
CHECK PROCEDURE FOR EFI SYSTEM
NOTE:
1. The EFI circuit can be checked
by
measuring the resis-
tance and voltage at the SST terminals.
2. The voltage check should be conducted under a condi-
tion where all connectors are connected.
3. Prior to the check, ensure that the battery voltage is 11 V
or more when the ignition switch is turned ON.
4. If any problem is encountered during this check, see the
section under "Trouble Shooting for EFI EleC1ronic Cir-
cutt with VoiVOhmmeter."
CAUTION:
• For the trouble shooting, use a voiVohmmeter whose
internal impedance is more than 10
kn!V.
Use of a volt'ohmmeter whose internal resistance is
I 0 kOIV or less may cause ECU malfunction and/or
misjudgment.
• No terminal except for the specified terminal should be
connected. Failure to observe this caution may cause
ECU mal!unC1ion.
EF-32
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