Mazda 2002 6 Workshop Manual page 222

DTC P0113 IAT circuit high input
Diagnostic procedure
STEP
1 PERFORM DTC CONFIRMATION PROCEDURE
• Perform DTC CONFIRMATION PROCEDURE.
(See F–66 DTC CONFIRMATION
PROCEDURE.)
• Is same DTC present?
2 INSPECT POOR CONNECTION OF IAT
SENSOR CONNECTOR
• Turn ignition key to OFF.
• Disconnect MAF/IAT sensor connector.
• Inspect for poor connection (damaged, pulled-
out pins, corrosion, etc.).
• Are there any malfunctions?
3 CLASSIFY IAT SENSOR MALFUNCTION OR
HARNESS MALFUNCTION
• Connect WDS or equivalent to DLC-2.
• Access IAT PID.
• Connect a jumper wire between MAF/IAT
sensor terminals D and E.
• Verify IAT value
• Is voltage below 4.9 V?
4 INSPECT IAT SENSOR SIGNAL CIRCUIT FOR
SHORT TO POWER
• Turn ignition key to ON (Engine OFF).
• Measure voltage between MAF/IAT sensor
terminal D (harness-side) and body ground.
• Is voltage B+?
ON-BOARD DIAGNOSTIC
INSPECTION
Yes Go to next step.
No Intermittent concern exists. Go to INTERMITTENT
CONCERN TROUBLESHOOTING procedure.
(See F–227 INTERMITTENT CONCERN
TROUBLESHOOTING.)
Yes Repair or replace terminal, then go to Step 8.
No Go to next step.
Yes Replace MAF/IAT sensor, then go to Step 8.
No Go to next step.
Yes Repair or replace harness for short to power, then go to
Step 8.
No Go to next step.
ACTION
F–93
F