Inspection Procedure

INSPECTION PROCEDURE



1. CHECK VOLTAGE BETWEEN TERMINALS KS AND E1 OF ECM CONNECTOR.
- Connect the Check Harness A.



- Measure voltage between terminals KS and E1 of ECM connector while engine is cranked.
Voltage: 2.0 - 4.0 volts
(Neither 0.0 volts nor 5.0 volts)
-> If OK but DTC 31 is displayed, check and replace ECM.
-> If not OK proceed to step 2.

2. CHECK FOR OPEN AND SHORT IN HARNESS AND CONNECTOR BETWEEN ENGINE CONTROL MODULE AND VOLUME AIR FLOW METER.
-> If OK proceed to step 3.
-> If not OK repair or replace harness or connector.

3. DISCONNECT VOLUME AIR FLOW METER CONNECTOR AND CHECK VOLTAGE BETWEEN TERMINALS KS AND EL OF ENGINE CONTROL MODULE CONNECTOR.
- Disconnect the volume air flow meter connector.
- Turn ignition switch ON.



- Measure voltage between terminals KS and E1 of ECM connector.
Voltage: 4.5 - 5.5 volts
-> If OK proceed to step 4.
-> If not OK check and replace ECM.

4. DISCONNECT VOLUME AIR FLOW METER CONNECTOR AND CHECK VOLTAGE BETWEEN TERMINALS VCC AND E1 OF ECM CONNECTOR.
- Disconnect the Volume Air Flow Meter connector.
- Turn ignition switch ON.



- Measure voltage between terminals VCC and E1 of ECM connector.
Voltage: 4.5 - 5.5 volts
-> If OK replace Volume Air Flow Meter.
-> If not OK check and replace ECM.