Tech-1 Usage For A/T Code 37 (SB93-05-020)

WARNING: This page is about the Trooper S, Automatic, which is a different variant/trim than selected.

Publication date: 1993-11-01
Reference number: SB93-05-020

TECH-1 USAGE FOR A/T CODE 37

TECHNICAL SERVICE BULLETIN

Reference Number(s): SB93-05-020

TECH-1 USAGE (4L3)-E A/T CODE 37)

Model(s): 1994 Isuzu Trooper; 1994 Isuzu Rodeo

Group: Transmission

Bulletin No.: SB93-05-020

Date: November, 1993

AFFECTED VEHICLES

1994 Trooper (UX) and Rodeo (UC) models equipped with automatic transmission.

SERVICE INFORMATION

On affected vehicles, when connecting the Tech-1 scan tool to the ALDL connector, a "no fault" diagnostic trouble code 37 may be set in the transmission control module (TCM). This may occur due to interruption of the serial data transfer when connecting the Tech-1 between the TCM and EGM. In this condition/situation, code 37 does not indicate a failure and does not require further diagnosis or repair. Clear the code from TCM memory as described in the appropriate service information. Then continue with Tech-1 diagnostics for other trouble codes set in the TCM.

A failure of the A/T torque management ALDL circuit will also set code 37. In this situation, an actual failure of the torque management circuit is indicated, and A/T will be in backup mode (manual shifting only). In this condition, refer to the appropriate service information for A/T diagnostic procedures for code 37.