Monitor Scantool Data
Scantool Test Condition
1.

IG Key : ON

2.

Actual value for evaluation

Engine idling

3.

Check items with the scantool

① APS 1 current data

② Air flow meter current data

1)

CURRENT DATA

The 5 V power source in the ECM is supplied to the Mass Air Flow Sensor (MAFS), Acceleration Position Sensor 1(APS 1). The ECM monitors this sensor supply voltage. In case of the sensor supply voltage 1 failure, the engine symptoms is as follows. Fast idle speed strategy at 1200 rpm without the accel position sensor action.

4.

IS THE ENGINE SPEED OR MAF SENSOR DATA INDICATED PROPERLY AT THE IDLE CONDITION ?

YES

a.

Fault is intermittent caused by poor contact in the sensor’s and/or ECM’s connector or was repaired and ECM memory was not cleared.

b.

Check for intermittent fault by observing the data parameter for a sudden change while wiggling the wiring and tapping lightly on the suspect component.

caution

Be careful not to damage wires or components during the test.

c.

Repair as necessary and go to " Verification of Vehicle Repair " procedure

NO

a.

Go to " W/Harness Inspection " procedure

Яндекс.Метрика