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REPLACEMENT OF ECU
INSPECTION
NOTE:
•
Even when the replacement of the ECU is required in
previous checks, make sure that the ECU malfunction
has not been caused by factors other than the ECU by
carrying out the following checks. Then, proceed to re-
place the ECU.
•
The measurement of voltage should be conducted
while all of the connectors are connected.
CAUTION:
•
In cases where the ECU is replaced with a new EFI
ECU, be sure to use the master key and connect the
test terminal with the earth terminal to start the engine
for the first time. The engine will not start with a key
other than the master key.
•
In cases where the ECU is replaced with an EFI ECU
other than a new one, the engine will not start even if
the master key is used.
For details, refer to the immobilizer manual.
1. Install the SST.
See page EF–18, "Preparation of trouble shooting with
SST".
2. Measurement of voltage or resistance
(1) Measure the voltage or resistance between respective
terminals.
(2) Check to see if the measured voltage or resistance
conforms to the specifications in accordance with the
following "CHARACTERISTICS OF ECU OUTPUT"
table.
EF–41
JEF00121-00701
JEF00122-00702
EFI ECU
SST
29 30
26 27 28
23 24 25
61 62
58 59 60
20 21 22
55 56 57
18 19
15 16 17
12 13 14
52 53 54
50 51
47 48 49
9 10 11
44 45 46
8
6
7
4
5
3
41 42 43
1
2
39 40
36 37 38
34 35
33
JEF00123-00703
31 32
63 64
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