Generic Scan Tool

OVERALL FUNCTION CHECK
This procedure can be used for checking the overall Exhaust Gas Recirculation (EGR) function. During this check, a Diagnostic Trouble Code (DTC) might not be confirmed.

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 71°C (160°F), perform only "For the malfunction a)".

^ If the engine coolant temperature is lower than 71°C (160°F), perform both "For the malfunction a)" and "For the malfunction b)".




For The Malfunction b)
1) Confirm the voltage between ECM terminal "51" and ground is higher than 1.48 volts.
Perform the following steps before the voltage becomes lower than 1.48 volts.

2) Start engine.




3) Check for the EGR valve lifting when revving from 2,000 rpm up to 4,000 rpm under no load.
EGR valve should be closed and should not lift up.