Description

DTC 16 A/T Control Signal Malfunction

CIRCUIT DESCRIPTION
The signal from the A/T CPU retards the ignition timing of the engine during A/T gear shifting, thus momentarily reducing torque output of the engine for smooth clutch operation inside the transmission and reduced shift shock.
If the engine control module (ECM) detects the diagnostic trouble code "16" in memory, it prohibits the torque control of the A/T which performs smooth gear shifting.

DIAGNOSTIC TROUBLE CODE DETECTING CONDITION
- Fault in communications between the engine CPU and A/T CPU in the engine control module (ECM).

TROUBLE AREA
- ECM