Mitsubishi 3000GT Service Manual page 771

Symptoms
When diagnostic trouble code No.
When diagnostic trouble code No. 21 is output. *2
When diagnostic trouble code N
ECS indicator light does not switch
is operated.
Anti-roll control only stops. *2
Anti-dive control only stops.
Anti-squat control only stops. *4
TROUBLESHOOTING HINTS
The G sensor is a sensor
If it fails, therefore, ride control stops.
which internally detects the voltages of the two sensor output lines connected to the ECS control
unit to detect an open circuit in the signal line. When the signal line is short-circuited or when the
power line is open-circuited, however, it cannot be detected. In a situation where anti-roll control
only stops, if diagnostic trouble code No. 21 is not on display, a short-circuited sensor output line
or open-circuited sensor power line is suspected.
The vehicle speed sensor is a sensor associated with attitude controls (anti-dive, anti-squat) and steering
stability controls (anti-roll, high speed sensitive controls). If all these controls stop, therefore, trouble
in the sensor is suspected. The vehicle speed sensor is also in use for operation of the speedometer
and for the other electronics controlled systems for the engine, automatic transaxle, etc.
The sensor associated with anti-squat control is the throttle position sensor. The sensor is also used for
control of the engine and automatic transaxle. If the sensor fails, therefore, the check engine/malfunction
indicator lamp in the combination meter will light, and engine diagnostic trouble code No. 14 will be output.
In a situation where anti-squat control only stops, therefore, if the check engine/malfunction indicator lamp
does not light, defective wiring is suspected between the ECS control unit and throttle position sensor.
ECS
ECS control unit
Steering angular velocity sensor *2
ECS control unit
Stop light switch
ECS control unit
Throttle position sensor *4
ECS control unit
with ride control (detecting pitching, bouncing and rough road).
associated
TSB Revision