Acura RL (1996-2004 year). Manual — part 532
TCS CONTROL UNIT 20P CONNECTOR
Wire side of female terminals
VB: Battery Voltage
Terminal
number
1
2
4
5
6
9
10
11
12
13
14
15
16
17
20
Wire
color
BLK/YEL
GRN/RED
BLU
PNK/BLU
BLK/WHT
BLK
BRN/WHT
GRN/WHT
BLU
GRN/ORN
BLK/ORN
BRN/BLK
WHT/BLU
BLU/GRY
GRN
BRN
Terminal sign
(Terminal name)
IG1
(Ignition 1)
PARK
(Parking)
SCS
(Service check
signal)
STR-GND
(Steering ground)
AT-SHIFT
(AT shift)
FSR
(Fail-safe relay)
PMG
(Power motor
Ground)
VPM
(Voltage power
motor)
STOP
(Stop)
NEP (Engine
speed pulse)
BARO
(Barometric)
TC-FC
(Traction control
fuel cut)
LG2
(Logic ground 2)
STR-VCC (Steer-
ing power supply)
WARN2
(Warning 2)
SH-MOT
(Shield motor)
MOT +
(Motor +)
MOT-
(Motor -)
Description
Detects ignition switch
IG1 signal
Detects parking brake
switch signal
Detects service check
connector signal
(Diagnostic trouble
code indication)
Ground for the steering
angle sensor
Detects A/T shift posi-
tion signal
Drives fail-safe relay
Power ground for the
TCS control valve
actuator motor
Power source for the
TCS control valve
actuator motor
Detects brake pedal
position switch signal
Detects engine speed
signal
Detects barometric
sensor signal
TCS Fl, Fuel cut
(torque down) signal
Ground for the logic
circuit
Power source for the
steering angle sensor
Drives TCS indicator light
(The indicator light comes
on by the self-bias)
Shield for the TCS con-
trol valve actuator motor
Drives TCS control
valve actuator motor
Drives TCS control
valve actuator motor
Measurement
terminals
1-GND
3-GND
4-GND
5-GND
6-GND
9-GND
10-GND
11-GND
12-GND
13-GND
14-GND
15-GND
16-GND
17-GND
Voltage
Conditions
(Ignition Switch ON (II))
Depress the parking
brake pedal.
Release the parking
brake pedal.
SCS service connector
connected.
SCS service connector
disconnected.
Shift the transmission
to position, then
start the engine.
Start the engine.
Start the engine.
Brake pedal depressed.
Brake pedal released.
Engine idling
TCS is functioning,
(maximum fuel cut)
TCS is not functioning.
Indicator light ON
Indicator light OFF
TCS is functioning.
TCS is not functioning.
TCS is functioning.
TCS is not functioning.
Output
voltage
VB
Below 0.6 V
VB
0 V
5 V
Below 0.3V
About 4 V
(5V 0V)
VB
1.5V
Below 0.3 V
0V
VB
VB
0 V
About 6V
(12V 0V)
About 3 V
About 1.5V
About 4.5 V
(5 V, PWM)
Below 0.3V
About 5 V
About 2 V
VB
VB
0 V
VB
0 V
Main Menu
Table of Contents
Troubleshooting Precautions
1. In any of these cases, the TCS indicator light may come on or stay on even the TCS system is normal.
The coolant temperature is 32°F (0°C) or below.
The parking brake is applied for more than 30 seconds while the vehicle is being driven.
The tires are not inflated to the specified pressure.
The wheel sensor signal is interrupted during driving at speeds of 6 mph (10 km/h) or above due to, for example, a
vehicle spinning.
The MAP sensor, the coolant temperature sensor, the ICM or the atmospheric pressure sensor system of the PGM-FI
system is faulty.
2. TCS does not function when the TCS indicator light is ON.
3. When both the TCS indicator light and the MIL are ON, troubleshoot the PGM-FI system first.
4. When both the TCS indicator light and the ABS indicator light are ON, troubleshoot the ABS first.
5. The DTC 4-9 (ABS down) is memorized when the ABS control unit cannot output the wheel speed signal due to, for
example, a missing or blown ABS B2 (15 A) fuse. If you fail to erase the DTC of the TCS after troubleshooting the ABS,
the DTC remains in the TCS control unit memory. Therefore, be sure to test-drive the vehicle, and check the TCS indica-
tor light before starting to troubleshoot the TCS.
Main Menu
Table of Contents
Diagnostic Trouble Code (DTC)
Diagnostic Trouble Code (DTC) Indication
1. Connect the SCS service connector to the service check connector under the glove box.
2. Turn the ignition switch ON (II), but do not start the engine.
3. Record the blinking frequency of the TCS indicator light. The blinking frequency indicates the diagnostic trouble code
(DTC).
4. Turn the ignition switch off, and remove the SCS service connector.
NOTE: The Malfunction Indicator Lamp (MIL) will stay on after the engine is started if the SCS service connector is con-
nected.
5. Perform the DTC erasure.
SERVICE CHECK
CONNECTOR (2P)
SCS SERVICE CONNECTOR
DTC Indication Pattern
TCS INDICATOR LIGHT
Turn the ignition switch ON (II). The TCS indicator light comes on to check the bulb. Do not count it as DTC.
The TCS control unit can memorize up to 3 DTCs.
A new DTC is not memorized when the TCS control unit has already memorized the same DTC.
The TCS control unit indicates the DTC repeatedly at intervals of 3.3 seconds.
If you miscount the blinking frequency or if you recheck the blinking frequency, turn the ignition switch OFF, then turn
it ON (II) to cycle the TCS indicator light again.
Main Menu
Table of Contents
Diagnostic Trouble Code (DTC)
DTC Erasure
1. Press the parking brake pedal.
2. Push and hold the TCS switch, then turn the ignition switch ON (II).
3. Hold the TCS switch pushed for 4 to 6 seconds, then release the TCS switch.
4. After 3 seconds, the TCS indicator light should go off and blink 2 times, then stay on. This means that the DTC is
erased.
NOTE:
Always follow these steps exactly. If you connect the SCS service connector and/or release the parking brake pedal dur-
ing these steps, the DTC will not be erased.
If the TCS indicator light blinks repeatedly, replace the TCS control unit.
Standard Indication Pattern
Abnormal Indication Pattern
Light blinks repeatedly
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