1995 ACURA TL Service Repair Manual

Position

The flow of fluid through the torque converter circuit is the same as in position.

The line pressure (1) becomes the line pressure (3) and flows to the 1-2 shift valve.The line pressure (3) becomes line pres-

sure (3') at the 1-2 shift valve and flows to the servo valve. The servo valve is moved to the right side (Reverse range posi-

tion) and uncovers the port to allow line pressure (3") to the manual valve. The line pressure (3') from the 1-2 shift valve

flows through the servo valve to the manual valve and becomes to the 4th clutch pressure (40). The 4th clutch pressure

(40) is applied to the 4th clutch, and the 4th clutch is engaged.

Reverse Inhibitor Control

When the position is selected while the vehicle is moving forward at speeds over 6 mph (10 km/h), the TCM outputs the

1st signal to shift control solenoid valves A and B; shift control solenoid valve A is turned ON, shift control solenoid valve

B is turned OFF. The 1-2 shift valve is moved to the right side and covers the port to stop line pressure (3') to the servo

valve. The line pressure (3') is not applied to the servo valve, and the 4th clutch pressure (40) is not applied to the 4th

clutch, as a result, power is not transmitted to the reverse direction.

NOTE: When used, "left" or "right" indicates direction on the hydraulic circuit.ProCarManuals.com

Description

B Position

The flow of fluid through the torque converter circuit is the same as in position.

The line pressure (1) becomes the line pressure (3) and flows to the 1-2 shift valve. The line pressure (3) becomes line

pressure (3') at the 1-2 shift valve and flows to the servo valve. The servo valve is moved to the right side (Reverse range

position) and uncovers the port to allow line pressure (3") to the manual valve as in position. The line pressure (3")

from the servo valve is intercepted by the manual valve.

However, hydraulic pressure is not supplied to the clutches, and power is not transmitted.

NOTE: When used, "left" or "right" indicates direction on the hydraulic circuit.
Hydraulic Flow (cont'd)ProCarManuals.com

Description

The parking brake mechanism locks the transmission by engaging the parking brake pawl into the parking gear which is

splined to the countershaft.

Shifting to position causes the parking brake pawl roller (installed at the end of the parking brake shift arm) to press the

parking brake pawl onto the parking gear. Even if the end of the parking brake pawl rides on top of the parking gear teeth,

slight movement of the countershaft will cause the parking brake pawl and the parking gear to mesh with each other com-

pletely, because the parking brake shift arm receives tension from the parking brake shift arm spring. The parking brake

pawl receives the tension (which acts to separate the parking brake pawl from the parking gear) from the parking pawl

spring.

PARKING GEAR
COUNTERSHAFT

1ST GEAR

PARKING BRAKE

PAWL

PARKING BRAKE

PAWL ROLLER

CONTROL SHAFT

PARKING PAWL

SPRING
PARKING BRAKE

SHIFT ARM
Parking Brake MechanismProCarManuals.com

Component Locations

BRAKE SWITCH

TRANSMISSION CONTROL

MODULE (TCM)

ENGINE CONTROL

MODULE (ECM)

THROTTLE POSITION (TP)

SENSOR

ENGINE COOLANT

TEMPERATURE (ECT)

SENSOR
LOCK-UP CONTROL SOLENOID

VALVE ASSEMBLY

MAINSHAFT SPEED SENSOR

COUNTERSHAFT SPEED

SENSOR

VEHICLE SPEED

SENSOR (VSS)
AUTOMATIC TRANSAXLE (A/T)

GEAR POSITION SWITCH

SHIFT CONTROL SOLENOID

VALVE ASSEMBLY*

LINEAR SOLENOID*

*: Located in transmission.ProCarManuals.com

TCM Terminal Voltage/Measuring Conditions

TCM Terminal Locations

A (26P) Connector

B (22P) ConnectorProCarManuals.com

Terminal NumberProCarManuals.com

Troubleshooting Procedures

Checking the Diagnostic Trouble Code (DTC)

with an OBD II Scan tool or Honda PGM Tester

When the TCM senses an abnormality in the input or output systems, the indicator light in the gauge assembly will

blink. When the 16P Data Link Connector (DLC) (located behind the ashtray) is connected to the OBD II Scan Tool or Honda

PGM Tester as shown, the scan tool or tester will indicate the Diagnostic Trouble Code (DTC) when the ignition switch is

turned ON(II).

When the indicator light has been reported on, connect the OBD II Scan Tool conforming to SAE J1978 or Honda PGM

Tester to the DLC (16P) behind the ashtray. Turn the ignition switch on (II), and observe the DTC on the screen of the OBD II

Scan Tool or Honda PGM Tester. After determining the DTC, refer to the electrical system Symptom-to-Component Chart

on page 14-56 and 14-57.

NOTE: See the OBD II Scan Tool or Honda PGM Tester user's manual for specific instruction.

OBD II SCAN TOOL or

HONDA PGM TESTER

Some PGM-FI problems will also make the indicator light come on. After repairing the PGM-FI system, disconnect the

BACK UP RADIO fuse (10 A) in the under-hood fuse/relay box for more than 10 seconds to reset the TCM memory, then

retest.

NOTE: Disconnecting the BACK UP RADIO fuse also cancels the radio anti-theft code, preset stations and the clock setting.

Get the customer's code number, and make note of the radio presets before removing the fuse so you can reset them.
DATA LINK CONNECTOR (16P)ProCarManuals.com

Checking th e Diagnosti c Troubl e Cod e (DTC )
wit h th e Servic e Chec k Connecto r an d Specia l Too l
Whe n th e TC M sense s a n abnormalit y in th e inpu t o r outpu t systems , th e indicato r ligh t i n th e gaug e assembl y wil l blink .
Whe n th e Servic e Chec k Connecto r (locate d unde r th e das h o n th e passenge r side ) i s connecte d wit h th e specia l too l a s
shown , th e indicato r ligh t wil l blin k th e Diagnosti c Troubl e Cod e (DTC ) whe n th e ignitio n switc h is turne d o n (II) .
Whe n th e indicato r ligh t ha s bee n reporte d on , connec t th e Servic e Chec k Connecto r wit h th e specia l tool .
Then tur n o n (II ) th e ignitio n switc h an d observ e th e indicato r light .
GAUG E ASSEMBL YSERVICE CHEC KCONNECTO R (2P )
INDICATO RLIGHT
SCS SERVIC E CONNECTO R07PAZ- 001010 0
Codes 1 throug h 9 ar e indicate d b y individua l shor t blinks , code s 1 0 throug h 1 8 ar e indicate d b y a serie s o f lon g an d shor t
blinks . On e lon g blin k equal s 1 0 shor t blinks . Ad d th e lon g an d shor t blink s togethe r t o determin e th e code . Afte r deter -
minin g th e code , refe r t o th e electrica l syste m Symptom-t o Componen t Char t o n page s 14-5 6 an d 14-57 .
short
Some PGM-F I problem s wil l als o mak e th e indicato r ligh t com e on . Afte r repairin g th e PGM-F I system , disconnec t th e
BAC K U P RADI O fus e (1 0 A ) i n th e under-hoo d fuse/rela y bo x fo r mor e tha n 1 0 second s t o rese t th e TC M memory , the n
recheck .
NOTE: Disconnectin g th e BAC K U P RADI O fus e als o cancel s th e radi o anti-theft code, prese t station s an d th e cloc k setting .
Ge t th e customer' s cod e number , an d mak e not e o f th e radi o preset s befor e removin g th e fus e s o yo u ca n rese t them .
See DTC 1
See DTC 2
See DTC1 4
ProCarManuals.com