ON-BOARD DIAGNOSTIC
F–95
F
Diagnostic procedure
STEP INSPECTION ACTION
1 PERFORM DTC CONFIRMATION PROCEDURE
• Perform DTC CONFIRMATION PROCEDURE.
(See F–66 DTC CONFIRMATION
PROCEDURE.)
• Is same DTC present?
Yes Go to next step.
No Intermittent concern exists. Go to INTERMITTENT
CONCERN TROUBLESHOOTING procedure.
(See F–227 INTERMITTENT CONCERN
TROUBLESHOOTING.)
2 INSPECT TERMINAL BENT
• Turn ignition key to OFF.
• Disconnect ECT sensor connector.
• Inspect for bent of ECT sensor terminals A and
B (part-side).
• Is there any malfunction?
Yes Repair or replace terminal, then go to Step 6.
No Go to next step.
3 CLASSIFY ECT SENSOR MALFUNCTION OR
HARNESS MALFUNCTION
• Connect WDS or equivalent to DLC-2.
• Access ECT PID.
• Verify ECT value when disconnecting ECT
sensor connector.
• Does ECT value change?
Yes Replace ECT sensor, then go to Step 6.
No Go to next step.
4 INSPECT ECT SIGNAL CIRCUIT FOR SHORT
TO GROUND
• Turn ignition key to OFF.
• Inspect continuity between ECT sensor
terminal A (harness-side) and body ground.
• Is there any continuity?
Yes Repair or replace harness for short to ground, then go to
Step 6.
No Go to next step.
5 INSPECT IAT CIRCUIT FOR SHORT
HARNESSES
• Inspect continuity between ECT sensor
terminal A and B (harness-side).
• Is there any continuity?
Yes Repair or replace harness for short, then go to next step.
No Go to next step.
DTC P0117 ECT circuit low input
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