EGR Control Solenoid: Testing and Inspection

A faulty EGR control solenoid will set code 34 in the on-board diagnostic system.

WIRE COLOR CODE IDENTIFICATION

L: Blue
B: Black
Y: Yellow
G: Green
R: Red
W: White
Br: Brown
Lg: Light green
Gr: Gray

Diagnostic Chart:

EGR CONTROL SOLENOID DIAGNOSTIC CHART

Input Signal:

CHECK ECM VOLTAGE

With ignition "ON," measure voltage between ECM connector terminal (E30) 18 and ground. It should read 10 - 13 Volts.

CHECK EGR CONTROL SOLENOID

Disconnect EGR control solenoid connector and measure resistance between solenoid terminals. It should read 36 Ohms at 20°C (68°F).

CHECK POWER SUPPLY TO EGR CONTROL SOLENOID

Voltage Test:

1. Turn ignition switch "ON".
2. Measure voltage between solenoid connector and ground as follows:
Connector & terminal: Voltage:
(E16)2-Ground 10 VDC minimum