Modification Of Automatic Transmission (TS 3-26 01126)

Publication date: 1996-01-12
Reference number: TS 3-26 01126

MODIFICATION OF AUTOMATIC TRANSMISSION

TECHNICAL SERVICE BULLETIN

Reference Number(s): TS 3-26 01126, Date of Issue: January 12, 1996

MODIFICATION OF AUTOMATIC TRANSMISSION

Model(s): 1995 Suzuki Sidekick

Section: Drivetrain

Bulletin No.: TS3-26 01126

Date: January 12, 1996

VEHICLES AFFECTED

Sidekick 2-door with GM 3-speed automatic transmission:

May, 1995 production (Canadian models).

August, 1995 production (Japan models).

CONDITION

Change in Automatic Transmission; elimination of A/T oil pressure switch. See Fig 1 .

CAUSE

Factory modification.

CORRECTION

When diagnosing the TCC system, please use the information as listed in this bulletin.

REVISION

Correction in parts interchangeability.

SERVICE INFORMATION

This bulletin is to inform you of the elimination of the Torque Converter Clutch (TCC) Oil Pressure Switch which has been carried out since May 1995 production for Canadian models and August 1995 production for Japan models. Due to this modification, the diagnostic procedures for the TCC system in the service manual have been changed. Please refer to Technical Service Bulletin number TS 3-25 to diagnose this system.

STARTING VIN NUMBERS

2S3TCO1C*S6417831

2S3TCO2C*S6418467

2S3TAO2C*S6417996

TORQUE CONVERTER CLUTCH (TCC) RELAY CONTROL SYSTEM (3 A/T)

This system controls the TCC relay, one of the components that controls the torque converter clutch. A circuit diagram of this system is shown at Fig 2 .

The TCC solenoid valve, under the control of the A/T oil pressure switch and TCC relay, opens and closes the A/T oil passage to lock and unlock the torque converter clutch.

The ECM controls the relay using information from the following sensors:

Throttle Position Sensor (TPS)
Camshaft Position Sensor (CMP)
Engine Coolant Temperature Sensor (ECT)
Vehicle Speed Sensor (VSS).

The ECM engages the relay only under the following conditions:

Engine is running
Engine coolant temperature is above 60°C (140°F)
Throttle valve opening is between 6.4° and 62.°
Vehicle speed is higher than
- 40 mph (64 km/h, 8-valve engine)
- 47 mph (75 km/h, 16-valve engine, late type ECM only)

Battery voltage is applied to the TCC solenoid valve under the following conditions:

The relay is ON.
The brake pedal is released (brake pedal switch is ON).
The A/T oil pressure is higher than the specified pressure (the oil pressure switch is ON).

Even when the relay is ON, if the brake pedal is depressed or the A/T oil pressure is too low, the TCC solenoid valve circuit opens and voltage is not applied.

TORQUE CONVERTER CLUTCH DIAGNOSIS (LATE TYPE ECM)

ELECTRICAL CHECK

Preliminary checking procedure in Section 7B of Service Manual should be performed prior to Fig 3 .

DIAGNOSIS

For diagnostic procedure, please refer to Technical Service Bulletin number TS 3-25. Also note that the continuity check between, Fig 3 , (1), pin of TCC relay coupler and ground IS NOT needed due to the elimination of the A/T oil pressure switch.

Fig 1: Automatic Transmission - Early/Late Models

Fig 2: Torque Converter Clutch Relay Control System - Identification

Fig 3: Torque Converter Clutch Diagnosis - Late Type ECM

PARTS INFORMATION

Part Name	Early P/N	Late P/N	#	Supply of Spare Parts	Interchange- ability OK or No
Automatic transmission 4WD 8-valve engine	21000-61A00	21000-61A01	1	Early & Late	Early & Late Not
Automatic transmission 4WD 16-valve engine	21000-61A30	21000-61A31	1	Early & Late	Early & Late Not
Automatic transmission 2WD 8-valve engine	21000-61A50	21000-61A51	1	Early & Late	Early & Late Not
Automatic transmission 2WD 16-valve engine	21000-61A60	21000-61A61	1	Early & Late	Early & Late Not