Toyota 1993 MR2 Wiring Diagrams page 142

SYSTEM OUTLINE
WHEN THE IGNITION SW IS TURNED TO ACC POSITION THE CURRENT FROM THE CIG RADIO AND CIG FUSE FLOWS TO TERMINAL
3 OF THE SHIFT LOCK ECU. IN THE ON POSITION, THE CURRENT FROM THE ECU–IG FUSE FLOWS TO TERMINAL 4 OF THE ECU.
1. SHIFT LOCK MECHANISM
WITH THE IGNITION SW ON, WHEN A SIGNAL THAT THE BRAKE PEDAL IS DEPRESSED (STOP LIGHT SW ON) AND A SIGNAL THAT
THE SHIFT LEVER IS PUT IN "P" RANGE (CONTINUITY BETWEEN P1 AND P OF THE SHIFT POSITION SW) IS INPUT TO THE ECU. THE
ECU OPERATES AND CURRENT FLOWS FROM TERMINAL 4 OF THE ECU
SOLENOID TERMINAL SL–
(PLATE STOPPER DISENGAGES) AND THE SHIFT LEVER CAN SHIFT INTO OTHER RANGE THAN THE "P" RANGE.
2. KEY INTERLOCK MECHANISM
WITH THE IGNITION SW IN ON OR ACC POSITION, WHEN THE SHIFT LEVER IS PUT IN "P" RANGE (NO CONTINUITY BETWEEN P2
AND P OF LOCK CONTROL SW), THE CURRENT FLOWING FROM TERMINAL 2 OF THE ECU
OFF. THIS CAUSES THE KEY INTERLOCK SOLENOID TO TURN OFF (LOCK LEVER DISENGAGES FROM LOCK POSITION) AND THE
IGNITION KEY CAN BE TURNED FROM ACC TO LOCK POSITION. IF THE IGNITION IS LEFT IN ACC OR ON POSITION WITH THE SHIFT
LEVER IN OTHER THAN "P" RANGE, THEN AFTER APPROX. ONE HOUR THE ECU OPERATES TO RELEASE THE LOCK.
SERVICE HINTS
SHIFT LOCK ECU
S 7
3–GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ACC OR ON POSITION
4–GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
1–GROUND : ALWAYS CONTINUITY
5–GROUND : APPROX. 12 VOLTS WITH BRAKE PEDAL DEPRESSED
: PARTS LOCATION
CODE SEE PAGE
J 1 26
J 3 26
: RELAY BLOCKS
CODE SEE PAGE
1 20
2 21
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODE SEE PAGE
3A
22 22
3D
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODE SEE PAGE
IE3 32
: GROUND POINTS
CODE SEE PAGE
IC 32
X 4 X
(W/ CRUISE CONTROL)
TERMINAL 1 OF THE ECU
CODE
K 2
S 7
RELAY BLOCKS (RELAY BLOCK LOCATION)
R/B NO. 1 (LEFT KICK PANEL)
R/B NO. 2 (ENGINE COMPARTMENT LEFT)
JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
COWL WIRE AND J/B NO. 3 (BEHIND COMBINATION METER) COWL WIRE AND J/B NO 3 (BEHIND COMBINATION METER)
JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)
GROUND POINTS LOCATION
INSTRUMENT PANEL BRACE LH
J 1
6 8 9 X
S 9 A BLUE (W/O CRUISE CONTROL)
1 2
TERMINAL SL+ OF THE SHIFT LOCK SOLENOID
GROUND. THIS CAUSES THE SHIFT LOCK SOLENOID TO TURN ON
SEE PAGE
26
26
J 3
1
X
S 9 B
1 2
X X
KEY INTERLOCK SOLENOID IS CUT
CODE SEE PAGE
A 26
S 9 S 9
B 26
K 2 BLUE S 7
1 2 1 2 3 4 5
147