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TR–72
DIAGNOSTIC CHART
Check continuity between terminal KNK
of ECU connector and body ground.
Check knock sensor.
Check for short circuit between ECU and
knock sensor.
Check for open circuit between ECU and
knock sensor.
Does malfunction disappear when a
known good knock sensor is installed?
Replace ECU. *
WIRING DIAGRAM AND ECU CONNECTORS
ENGINE TROUBLESHOOTING
–
Circuit Inspection
Replace knock sensor.
Repair or replace harness and
connector.
Replace knock sensor.
* When diag. code 52 is
not displayed, proceed
to next circuit inspection
shown on matrix chart
(See page TR–21).
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