1995 Isuzu Rodeo Question plase help.

MOE24

MEMBER
1995 ISUZU RODEO
6 CYL
2WD
AUTOMATIC
170,000 MILES

My isuzu transmission lights comes on and off. And everytime it comes I have a hard time pickin up the speed. And I wont change gear. I was told its an electrical problem and its code 37. So do you know whats code 37 is and will it work if I change the tcm.

1 Reply

KHLOW2008

MECHANIC
41,815 POSTS

Hi Moe24,

Thank you for the donation.

Here is a description of the problem. It could be a fault with the TCM or its wiring circuit.

DTC 37: TORQUE MANAGEMENT SERIAL LINE FAULTY

Description
Torque management uses TCM to deliver a spark advance signal to Engine Control Module (ECM) during transmission shifting. This controls engine torque and reduces engagement shock caused by changing of vehicle speed. Each time transmission shifts with torque management active, TCM delivers a signal to the ECM.

Diagnostic Aids
This diagnostic test is not an electrical test performed by the TCM, but a comparison of signal input. DTC 37 will set when a torque management failure is present, or ECM does not acknowledge signal from TCM when transmission shifts with torque management active. Once DTC 37 is set, CHECK TRANS light will flash and transmission will go into back-up mode. Back-up mode may be cleared by turning ignition off, then back on again.