G34810
E23
E24
B51051
B85961
GND
B51050
B85962
GND
--
DIAGNOSTICS
ENGINE IMMOBILIZER SYSTEM (1ND -- TV)
05 -- 391
COROLLA Supplement (RM1129E)
3. CHECK ECM
(a) Measure the voltage of the connectors.
Standard:
Symbols (Terminal No.)
Wiri ng Color
Terminal Description
Condition
Specified Condition
+B (E24 -- 1) -- E1 (E24 -- 2)
B--W -- W--B
Battery
Ignition switch ON
10 to 14 V
+B (E24 -- 61) -- E1 (E24 -- 2)
B--W -- W--B
Battery
Ignition switch ON
10 to 14 V
IMO (E24 -- 4) -- E 1(E24 -- 2)
LG -- B -- W -- B
Transponder key ECU in-
put signal
Ignition switch ON
IMI (E24--6) -- E1 (E24--2)
LG--R -- W--B
Transponder key ECU in-
put signal
Ignition switch ON
E1 (E24--2) -- Body ground
W--B -- Body ground
Ground
Always
Below 1
Ω
E1 (E24--41) --
Body ground
W--B -- Body ground
Ground
Always
Below 1
Ω
E1 (E24--62) --
Body ground
W--B -- Body ground
Ground
Always
Below 1
Ω
If the result is not as specified, the ECM may have a malfunction.
(b)
Inspect using an oscilloscope.
Waveform 1 (Reference):
Terminal
IMO -- E1
Tool Setting
10 V/DIV., 100 msec./DIV.
Condition
Ignition switch ON
Waveform 2 (Reference):
Terminal
IMI -- E1
Tool Setting
10 V/DIV., 100 msec./DIV.
Condition
Ignition switch ON
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TOYOTA COROLLA REPAIR MANUAL SUPP 1129E