Auto Measurements

AUX -- Rotunda Multi-point Auxiliary Adapter 007-00023 or equivalent

1. Key On Engine Off (KOEO)/Key On Engine Running (KOER).

2. Select PIN SELECTOR A AUX (red).

3. Insert a jumper from device into the AUX input jack.

4. Read the value in DCV (DCV light ON).

Change Condition to Cause Response by Input
Purpose: To verify the sensor receives and responds to changes.

1. Key On Engine Off (KOEO)/Key On Engine Running (KOER).

2. Select the sensor on PIN SELECTOR A.

3. Create a condition or change a condition.

4. Observe the change in sensor value. Verify the change with the appropriate graph or chart.

Examples: Move the throttle, watch the Throttle Position (TP) increase in sensor values. Warm up the engine, watch the Engine Coolant Temperature (ECT) values decrease. Depress the brake pedal, watch the Brake On/Off (BOO) light.

Change Condition and Verify Output Response.
Purpose: To verify EEC module and actuator circuit responds to sensor input.

1. Key On Engine Off (KOEO)/Key On Engine Running (KOER).

2. Select actuator on PIN SELECTOR A.

3. Create a change for the input device with the switchbox or vehicle operation.

4. Observe the change in the actuator signal and observe the light.

Examples: Increase throttle position (accelerate), observe SPOUT increase. Move EGO switch to lean, observe SPOUT increase. Turn ON the A/C at WOT; observe the WAC light ON and grounded.

Check Value
Purpose: To verify the correct value for a device or signal.

1. Key On Engine Off (KOEO)/Key On Engine Running (KOER).

2. Select signal from PIN SELECTOR A or B.

3. Since various units are used, refer to METER FUNCTION light.

Click Testing (Relays/Solenoids)
Purpose: Activate solenoid or relay from monitor and observe device.

1. Key On Engine Off (KOEO) only.

2. Can also be done in the Manual DCV Function mode.

3. Select the relay or solenoid signal on PIN SELECTOR A and correct ground on REFERENCE PIN SELECTOR.

4. Insert switchbox into SELECTOR PIN jacks.

5. Push the small red button to turn ON relay or solenoid.

6. Listen for a click and observe the signal light for illumination.

PCM Input Check (STO)
Purpose: Confirm that the Powertrain Control Module (PCM) sets CHECK ENGINE lamp for certain PCM sensors.

1. Key On Engine Off (KOEO).

2. Select sensor from PIN SELECTOR A.

3. Set REFERENCE PIN selector to signal return (SIGRTN).

4. Insert switchbox into SELECTOR PIN jacks.

5. Move the AIM switch to KEY ON ENG OFF position.

6. Push the small red button on switch box and observe STO light turn ON and speaker sound as long as the button is pressed.

7. Return the AIM switch to the OFF position.

Output State Check (Solenoids/Relays)
Purpose: Exercise actuator devices after KOEO Diagnostic Test Mode.

1. Key On Engine Off (KOEO).

2. Move the AIM switch to the KEY ON ENG ON position and wait for the output codes (beeps) to end.

3. Completely depress and release the throttle -- observe the signal light should turn ON.

4. Completely depress and release the throttle -- the light should turn OFF.

5. Return the AIM switch to the OFF position.