Code No. 16 (Egr Position Sensor) - Mazda 626 MX-6 Workshop Manual

Code No. 16 (EGR position sensor)

Are there poor connections in sensor circuit?
Is EGR control valve OK? (Refer to page 4B—94)
Is resistance of EGR position sensor OK?
(Refer to page 4B—94)
Is there continuity between EGR position sensor and
engine control unit?
EGR position sensor
(C) (YL wire)
(B) (LgY wire)
(A) (LgR wire)
Is there 4.5—5.5V at A terminal of EGR position sen­
sor connector? (Refer to page 4B—94)
Is same Code No. present after performing after­
repair procedure? (Refer to page 4B—11)
rminal voltage OK? (Refer
Is engine control unit 2F te
to page 4B—106)
YES
NO
NO
YES
YES
Engine control unit
2F
2C
2A
YES
YES
YES
YES
TROUBLESHOOTING WITH SST 4 B
Repair or replace connector
Replace EGR control valve
NO
Replace EGR control valve
NO
PC: Open circuit in wiring harness from EGR position
sensor to engine control unit
NO
PC: Short circuit in wiring harness from EGR position
sensor A terminal to engine control unit 2A
terminal
• Engine control unit malfunction
NO
EGR position sensor and circuit OK
NO
PC: Short circuit in wiring harness from EGR position
sensor C terminal to engine control unit 2F
terminal
Replace engine control unit
PC: Possible Cause
86U04B-018
4B-27