ENGINE 187 PINOUT DETAILS PIN NO DESCRIPTION 1 EGR +ve input 2 EGR -ve input 3 EGR feed back supply 4 EGR feed back return 5 EGR feed back input INSPECTION COLD TEST Measure the resistance between the two connector terminals of throttle actuator; it should be ~3 ohms HOT TEST 1. Apply 13.5V DC to the throttle actuator and measure the current taken by the actuator, Continuous current should not be greater than 1.0 Amperes and instantaneous current should not be greater than 5.5 Amperes. 2. Measure the inductance of the motor coil by applying 13.5 V AC signal with frequency of 1 KHz. 3. Inductance value should not be greater than 2.3 milli Henry. REMOVAL 1. Drain the coolant. Refer coolant replacement procedure in Engine “On Vehicle Repair ‘section 2. Open the bonnet and remove the engine cover. 3. Disconnect the electrical connection of the EGR valve. 4. Loosen and remove the bolts to disconnect the EGR pipe from the EGR cooler assembly. NOTE The EGR pipe is bent in the intake adaptor pipe and cannot be removed. Do not attempt to remove it without the intake adaptor pipe. 5. Disconnect the hose (1) connecting the vacuum solenoid valve (3) to the By-pass actuator valve (2). 6. Remove the spring band clamp (2) and disconnect the hose (1) connecting EGR coolant inlet to the coolant outlet pipe.
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