For the Above Malfunction a)

OVERALL FUNCTION CHECK
Instead of performing DTC DETECTING CONDITION, the following method can be used for checking the Exhaust Gas Recirculation (EGR) function. (The "NG" of the OVERALL FUNCTION CHECK means the same as the Diagnostic Trouble Code (DTC) detection.)

Before starting with the following procedure, check the engine coolant temperature of the freeze frame data with CONSULT or Generic Scan Tool (GST).

If the engine coolant temperature is higher than or equal to 55°C (131°F), perform only "For the above malfunction a".

If the engine coolant temperature is lower than 55°C (131°F), perform both "For the above malfunction a" and "For the above malfunction b".

For the above malfunction a)
1. Start engine and warm it up sufficiently.




2. Check the EGR valve lifting when racing from 2,000 rpm up to 3,500 rpm under no load. EGR valve should lift up and down without sticking.




3. Disconnect EFI (EGR temperature sensor) sub-harness connector.




4. Check voltage between EGR temperature sensor sub-harness connector terminal "2" and ground at idle speed.
Less than 4.5 volts should exist.




5. Turn ignition switch "OFF". Check harness continuity between EGR temperature sensor sub-harness connector terminal "6" and Engine Control Module (ECM) terminal "50".
Continuity should exist.
6. Perform Testing And Inspection Procedure for the EGR Temperature Sensor. Testing and Inspection