Special Tool - Vehicle Speed Simulator Instructions
86mitsubishi04SUBJECT:
VEHICLE SPEED SIMULATOR - INSTRUCTIONS FOR USE
NO. STB-86-08-007
DATE September, 1986
MODEL Galant
FIGURE 1:
PURPOSE
This bulletin contains instructions for using the Vehicle Speed Simulator (Fig. 1) which is a 1986 Essential Special Tool. This diagnostic tool can simulate car motion without the need for road-testing. It is used for testing the following systems in the 1986 Galant.
It is used to check three major systems in the 1986 Galant for normal operation. Unusual or abnormal conditions can be readily identified for further diagnostic and corrective action. The three systems tested are:
A. ECS (Electronically-Controlled Suspension)
B. TPS (Throttle Position Sensor)
C. Steering Wheel Angular Velocity Sensor
DIAGNOSTIC PROCEDURE:
A. ELECTRONICALLY-CONTROLLED SUSPENSION.
The Vehicle Speed Simulator quickly checks six operating characteristics of the Galant ECS System.
I. ECS Alarm And Indicator Light II. Suspension Firmness Adjustment III. High Speed Memory IV. High Speed Height Adjustment
V. High Speed Automatic Height Adjustment High - Normal VI. High Speed Automatic Height Adjustment Normal Low
FIGURE 1:
FIGURE 2:
I. ECS Alarm and Indicator Light Inspection
1. Connect the Vehicle Speed Simulator (Fig. 1) to the diagnostic connector behind the glove box and the cigarette lighter receptacle (Fig. 2). Be sure the vehicle speed knob on the simulator is set at 0 mph.
FIGURE 3:
2. Turn the ignition ON. On observe that the alarm light (Fig. 3) glows about 1.5 seconds and then goes off. This indicates normal operation.
3. Set the control panel to the following settings:
^ HIGH/AUTO switch to AUTO
^ SPORT/AUTO switch to AUTO
^ Ride Height NORMAL
^ Suspension set to SOFT
FIGURE 4:
4. Check to see that the red LED on the Simulator lights up (Fig. 4). This verifies that the Simulator has power.
FIGURE 5:
II. Suspension Firmness Adjustment
1. Set the car speed knob on the Simulator to 95 mph. Observe the suspension control panel display (Fig. 5).
A. The "HARD/SOFT" indicator should change to "HARD". The suspension height stays at "NORMAL".
B. In a few seconds, the suspension height indicator should change to "LOW".
FIGURE 6:
2. Under the hood, remove the rubber covers on both front struts: then turn the Simulator speed knob below 94 mph and observe the movement of the strut actuators, (Fig. 6). At the same time, the control panel display changes from "HARD" to "SOFT". If there is actuator movement and display change, the system is normal.
FIGURE 7:
III. High Speed Memory Test
1. Set the knob on the Simulator to 70 mph. Observe the control panel display. The suspension firmness indicator should show "SOFT". Now press the "SPORT AUTO" button and hold. There should be a short beep followed by a long beep, and the display should change to "HARD/LOW. If the system is operating properly, the changeover point to "HARD/ LOW' has been set at 70 mph. See Fig 7.
FIGURE 8:
2. Return the speed knob to 0, and then set it at some setting above 70 mph. Observe that the firmness display changes immediately to "HARD" and after ten seconds the height changes to "LOW". Fig.8. Listen for the sound of air bleeding from the system; watch the strut actuators as the height changes. These indicate normal operation.
FIGURE 9:
3. Reset the "SPORT/AUTO" switch to "AUTO". Turn the Simulator knob to reduce car speed to 60 mph; watch as the suspension display changes to "SOFT". (Fig. 9). This indicates normal operation.
FIGURE 10:
IV. High Speed Height Adjustment
1. Set the Simulator to 0 mph.
2. Start the engine and let it idle.
3. Press the "HIGH/AUTO" switch. Observe the control panel as firmness goes to "HARD" automatically. Fig. 10.
FIGURE 11:
4. Attempt to change suspension setting to "SOFT" by pressing "SPORT/AUTO". Observe that "SOFT" cannot be chosen when suspension is "HIGH" at 0 mph. Fig. 11.
5. Set the "SPORT/AUTO" switch to "AUTO".
FIGURE 12:
V. High Speed Automatic Height Adjustment - HIGH NORMAL
1. Turn the Simulator speed knob to 45-50 mph. After about 10 seconds, the display should change to "NORMAL" and "SOFT" (Fig. 12).
2. Press the "SPORT/AUTO" switch, "HARD" and "SOFT" suspension settings should be selectable. Fig. 12. Return the "SPORT/AUTO" switch to "AUTO".
FIGURE 13:
VI. High Speed Automatic Height Adjustment - NORMAL - LOW
1. Set the Simulator speed knob fo 55 mph. Observe the control panel display to see suspension height change to "Low" at this speed after about 10 seconds. Fig. 13.
FIGURE 14:
B. TPS (THROTTLE POSITION SENSOR) INSPECTION
1. Set the Simulator speed knob to 0 mph.
2. Stop the engine. Turn the ignition ON.
3. Depress the accelerator rapidly to the floor while observing the control panel (Fig. 14). If the lights do not change, the system is operating properly.
FIGURE 15:
4. Turn the Simulator speed knob to 20 mph. Again push the accelerator rapidly to the floor. The control panel indicator light should change from "SOFT" to "HARD" and back again if the TPS is making its proper input to the suspension system (Fig. 15).
NOTE: This is NOT a check for TPS adjustment. See 1986 Galant Service Manual and STB-86-14-005.
FIGURE 16:
C. STEERING WHEEL ANGULAR VELOCITY SENSOR INSPECTION
This procedure tests the operation of the steering wheel angular velocity sensor.
1. Set the Simulator speed control knob to 10-15 mph. Twist the steering wheel back and forth rapidly while observing the control panel. If there is no change, the system is operating properly (Fig. 16).
FIGURE 17:
2. Turn the knob to 30 mph and again work the steering wheel rapidly back and forth while observing the control display. The suspension indicator should indicate "HARD" as long as the wheel is turned back and forth, but afterward it should return to "SOFT". This verifies proper operation of the sensor (Fig. 17).
SUMMARY
The foregoing tests permit a thorough check of the normal operating mode of the electronic display panel, the strut actuators, the throttle position sensor operation, and the steering wheel angular velocity sensor. Unusual or abnormal results require further diagnostic checks and corrective action. Please refer to the Service Manual for additional information.