Troubleshooting W/ Volt, Ohmmeter - Toyota 3S-GE Repair Manual

EG488 ENGINE — EH SYSTEM
TROUBLESHOOTING w/ VOLT, OHMMETER
HINT:
0 The following troubleshooting procedures are designed for inspection of each separate system,
and therefore the actual procedure may vary somewhat. However, troubleshooting should be
performed while referring to the inspection methods described in this manual.
0 Before beginning inspection, it is best to first make a simple check of the fuses, fusible link and
the condition of the connectors.
0 The following troubleshooting procedures are based on the supposition that the trouble lies in
either a short or open circuit within the computer.
0 If engine trouble occurs even though proper operating voltage is detected in the computer
connector, then it can be assumed that the ECU is faulty and should be replaced.
FUSES AND FUSIBLE LINK LOCATION °'
ST202
|GN Fuse GAUGE Fuse
ST Fuse
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ZCS
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AM2 Fuse
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CIDZC1 AM2 Fuse
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A 2 use Li I' ' _,, ?
AM1H-Fus 'I' EFI Fuse
Q" i
MAIN H-Fuse
MAIN F
SW20
amdfigk Q
do
GAUGE Fuse Z"
I
MAIN FL 1.0 Y FL
P17395
P17811
213032