TRANSMISSION CONTROLS
TORQUE CONVERTER CLUTCH (TCC) SOLENOID
AND RELAY
The TCC solenoid is only used on three-speed au-
tomatic transmissions. The Powertrain Control Mod-
ule (PCM) operates the TCC solenoid by energizing
the TCC relay.
Circuit G50 from fuse 5 in the Power Distribution
Center (PDC) supplies voltage to the coil side of the
TCC relay. When the PCM provides a ground path on
circuit K54, the relay contacts close.
When the relay contacts close, they connect circuit
A14 from fuse 1 in the PDC with circuit T22. Circuit
T22 supplies battery voltage to the case grounded
TCC solenoid. Circuit K54 connects to PCM cavity
54.
HELPFUL INFORMATION
²In the RUN or START position, the ignition switch
connects circuit A1 from fuse 4 in the PDC to circuit
A21.
²Circuit A21 powers fuse 5 in the fuse block.
²Circuit G50 also connects to the engine data link
connector, Automatic Shut Down (ASD) relay, and
fuel pump relay.
UPSHIFT LAMP
On vehicles equipped with a manual transmission,
the PCM grounds the up-shift lamp on circuit K54.
Circuit K54 connects to cavity 54 of the PCM.
DIAGRAM INDEX
Component Page
Fuse 1 (PDC)...........................8W-31-2
Fuse 4 (PDC)...........................8W-31-2
Fuse 5 (Fuse Block).......................8W-31-2
Ignition Switch..........................8W-31-2
Instrument Cluster........................8W-31-2
Powertrain Control Module (PCM)..............8W-31-2
TCC Relay.............................8W-31-2
TCC Solenoid...........................8W-31-2
J8W-31 TRANSMISSION CONTROLSÐYJ VEHICLES 8W - 31 - 1
ANTI-LOCK BRAKES
GENERAL INFORMATION
Three fuses supply power for the Anti-Lock Brake
System (ABS); fuses 9 and 10 in the PDC and fuse
13 in the fuse block. Fuses 9 and 10 in the Power
Distribution Center (PDC) are connected directly to
battery voltage and are HOT all times. Fuse 13 is
HOT when the ignition switch is the RUN position.
In the RUN position, the ignition switch connects
circuit A1 from fuse 4 in the PDC with circuit A22.
Circuit A22 connects to a bus bar in the fuse block.
The bus bar feeds circuit F15 through fuse 13. Fuse
13 is a 2 amp fuse.
Circuit F15 splices to the coil side of the ABS
power relay and cavity 53 of the ABS control module.
Circuit Z1 provides ground for the ABS control
module. Circuit Z1 connects to cavities 1 and 19 of
the ABS control module.
Refer to group 5, Brakes for operational descrip-
tions of ABS system components.
WHEEL SPEED SENSORS
The all wheel anti-lock system uses four wheel
speed sensors; one for each wheel. Each sensor con-
verts wheel speed into an electrical signal that it
transmits to the ABS control module. A pair of
twisted wires connect to each sensor to provide sig-
nals to the ABS control module.
Circuits B6 and B7 provide signals to ABS control
module from the right front wheel speed sensor. Cir-
cuit B6, which provides the LOW signal, connects to
cavity 29 of the ABS control module. Circuit B7 con-
nects to cavity 47 of the module and provides the
HIGH signal.
Circuits B8 and B9 provide signals to ABS control
module from the left front wheel speed sensor. Cir-
cuit B8, which provides the LOW signal, connects to
cavity 30 of the ABS control module. Circuit B9 con-
nects to cavity 48 of the module and provides the
HIGH signal.
Circuits B1 and B2 provide signals to ABS control
module from the right rear wheel speed sensor. Cir-
cuit B1 which provides the LOW signal, connects to
cavity 27 of the ABS control module. Circuit B2 con-
nects to cavity 45 of the module and provides the
HIGH signal.
Circuits B4 and B3 provide signals to ABS control
module from the left rear wheel speed sensor. Circuit
B3, which provides the LOW signal, connects to cav-
ity 28 of the ABS control module. Circuit B4 connects
to cavity 46 of the module and provides the HIGH
signal.
ACCELERATION SWITCH
During four-wheel drive operation, the acceleration
switch provides deceleration data to the ABS control
module. Refer to Group 5, Brakes for additional in-
formation.
Circuits B21, B22, and B23 connect the accelera-
tion sensor to the ABS control module. Circuits B21
and B22 provide switch states while circuit B23 pro-
vides ground. At the ABS control module circuit B21
connects to cavity 25, circuit B22 connects to cavity
43 and circuit B23 connects to cavity 26.
ABS POWER RELAY
The ABS power relay is located in the Power Dis-
tribution Center (PDC). When the ABS module
grounds the ABS power relay on circuit B20, the re-
lay switches to connect circuit B15 and circuit A20
from PDC fuse 10. Circuit F15 from fuse 13 in the
fuse block splices to feed the coil side of the ABS
power relay. Circuit B20 connects to cavity 34 of the
ABS control module.
Circuit B15 is double crimped at the ABS power re-
lay. One branch of circuit B15 supplies power to the
coil side of the ABS pump motor relay. The other
branch of circuit B15 splices to cavities 3 and 33 of
the ABS control module and to the hydraulic control
unit.
ABS PUMP MOTOR RELAY
The ABS pump motor relay in the Power Distribu-
tion Center (PDC) supplies voltage to the ABS pump
motor. When the ABS power relay energizes, circuit
B15 supplies battery voltage to the coil side of the
ABS pump motor relay. The ABS control module pro-
vides ground for the relay on circuit B116. Circuit
B116 connects to cavity 15 of the ABS control mod-
ule.
When the ABS pump motor energizes, it connects
circuit A10 from PDC fuse 9 to circuit B25. Circuit
B25 supplies battery voltage to the pump motor. Cir-
cuit Z12 provides ground for the pump motor.
PUMP MOTOR SPEED SENSOR
The input from the pump motor speed sensor tells
the ABS control module that the pump is operating.
Circuit B17 and B16 from the control module connect
to the speed sensor.
BRAKE PEDAL TRAVEL SENSOR
The brake pedal travel sensor provides the ABS
control module with data regarding brake pedal posi-
tion. The sensor is a variable resistor that the ABS
J8W-32 ANTI-LOCK BRAKESÐYJ VEHICLES 8W - 32 - 1
