Mazda MX-6 1998, Workshop Manual

Page: 490 / 1282

EMISSION SYSTEM
EGR VALVE REMOVAL/INSTALLATION [KL]
Warning
• Do not remove the EGR valve with the
engine hot. Engine coolant in the EGR
valve may badly burn or injure. Always
remove and install the EGR valve when the
engine is cold.
1. Remove in the order indicated in the table.
2. Install in the reverse order of removal.
W6U116W0K
1 EGR valve connector
2 Engine coolant hose
i t
Removal Note
3 EGR valve
Engine Coolant Hose Removal Note
• To avoid engine coolant leakage, plug the engine
coolant hose after disconnecting.
EGR VALVE INSPECTION
On-vehicle Inspection
1. Crank the engine and listen for initialization noise
(clicks) of the EGR valve by using a screwdriver
or a soundscope.
Note
• EGR valve initialization is closing action of the
valve observed before and after the engine is
started, and when the engine is stopped.
2. If the initialization noise is not heard, inspect for
continuity of the wiring harness between the EGR
valve and the PCM, and inspect the EGR valve.
Off-vehicle Inspection
1. Inspect resistance of the EGR valve coils.
Terminals
Resistance (ft)
C— E
C— A
D— B
D— F
Approx. 22
PCM
EGR VALVE
EGR VALVE
W 6 U 1 1 6 W 1 1
W6U116WAG
W 6 U 1 1 6 W A H
2. If not as specified, replace the EGR valve.
19—25
.9—2.6,
7.9—10.7 N m
{80—110 kgfcm,
69.5—95.4 Inlbf)
Nm {kgfm, ftlbf}
W 6 U 1 1 6 W N F
MAIN
RELAY
0 1 -1 6 -7