Test Mode - Toyota 22R-E Service Manual

ENGINE – MFI SYSTEM
(c) (2 trip detection logic)
The diagnostic trouble codes 21, 25, 26 and 71 are
used "2 trip detection logic" is used. With this logic,
when a logic malfunction is first detected, the mal–
function is temporarily stored in the ECM memory. If
the same case is detected again during the second
drive test, this second detection causes the malfunc–
tion indicator lamp to light up.
The 2 trip repeats the same mode a 2nd time.
(However, the IG SW must be turned OFF between
the 1 st time and 2nd time).
5. After the diagnosis check, remove SST.
SST 09843–18020

(Test mode)

HINT:
Compared to the normal mode, the test mode has
high sensing ability to detect malfunctions.
It can also detect malfunctions in the starter
signal circuit, air conditioning signal and park/
neutral position switch signal.
Furthermore, the same diagnostic items which
are detected in the normal mode can also be
detected in test mode.
To obtain an output of diagnostic trouble codes,
proceed as follows:
1. Initial conditions
(a) Battery voltage 11 volts or more
(b) Transmission in neutral position
(c) Accessories switched OFF
(d) Engine at normal operating temperature
2. First using SST, connect terminals TE2 and El of the
DLC1, then turn the ignition switch on to begin the
diagnosis in the test mode. :
SST 09843 –18020
EG2–173