Mitsubishi Lancer Evolution IV, Workshop Manual

Page: 207 / 391

REAR AXLE –
Troubleshooting <AYC>
27-24
7. CHECK AT AYC-ECU TERMINALS
7-1 TERMINAL VOLTAGE LISTING
(1) The voltage is to be measured across each terminal and ground terminal.
(2) Fig. below shows the arrangement of the terminals.
Terminal
No. Check item Check requirement Normally
1 Lateral acceleration sensor Ignition switch: ON 2.4 – 2.6 V
(horizontal position)
2 Longitudinal acceleration
sensor ground
Lateral acceleration sensor
ground At all times 0 V
3 Longitudinal acceleration
sensor Ignition switch: ON 2.4 – 2.6 V
(horizontal position)
4 Steer sensor (ST-2) Engine: Idle speed
Turn steering wheel slowly. 0 V
↔
approx. 3 V
flashing
5 Steer sensor (ST-1) Engine: Idle speed
Turn steering wheel slowly. 0 V
↔
approx. 3 V
flashing
6*
1
FR wheel speed Vehicle stationary 1 V or less
Forward vehicle slowly. 0 – 5 V
7*
1
FL wheel speed Vehicle stationary 1 V or less
Forward vehicle slowly. 0 – 5 V
8*
1
RR wheel speed Vehicle stationary 1 V or less
Forward vehicle slowly. 0 – 5 V
9*
1
FL wheel speed Vehicle stationary 1 V or less
Forward vehicle slowly. 0 – 5 V
10 Diagnosis selection input Battery voltage
11 Stop lamp switch Ignition switch:
ON Stop lamp switch: ON Battery voltage
ON
Stop lamp switch: OFF 1 V or less
12*
1
ABS monitor When ABS monitor is activated Battery voltage
When ABS monitor is deactivated 1 V or less
17 Steer sensor (ST-N) Engine:
Idle speed Steering wheel: Neutral position 0.5 V or less
Idle speed
Steering wheel: Turned 90
_
from
neutral position
2.5 – 3.5 V