Troubleshooting - Mazda 626 MX-6 Workshop Manual

4B
EGR SYSTEM

TROUBLESHOOTING

Check the condition of the wiring harness and connectors before checking sensors or switches.
Note
Make the system inspection first. If no problem is found, continue with the next system
inspection of the Troubleshooting Guide. (Refer to pages 4B—8 and 9.)
Possible cause
Page
Checking order
4B-92
Water
EGR EGR po­ Sole­
thermo control sition
noid
sensor sensor
valve valve
Vent Vac.
4B-116 4 B -9 4 4B -93 4 B -9 3 4B—112 4B -95 4B-116 4B-105 4B-106
4
7 3
626, MX-6 Revised 10/87
Throttle Vacuum Water
sensor
chamb­ thermo
er switch
2 8 6 5
System
Engine control
unit terminal inspec­
tion
1H 2M, 2N
and 107 4B—93
1
9 10
86U04B-107