Dtc P0097 - Mazda Mazda6 Workshop Manual Supplement

DTC P0097

DTC P0097 IAT sensor No.1 circuit low input
• PCM monitors input voltage from IAT sensor No.1 while engine is running. If input voltage from IAT sensor
DETECTION
CONDITION No.1 is below 0.1 V, PCM determines IAT sensor No.1 circuit low input.
• IAT sensor No.1 malfunction
• Connector or terminal malfunction
POSSIBLE
• Short to GND in wiring between MAF/IAT sensor terminal D and PCM terminal 60
CAUSE
• IAT sensor No.1 signal and GND circuits short each other
• PCM malfunction
IAT SENSOR NO.1
MAF/IAT SENSOR
HARNESS SIDE CONNECTOR
E
Diagnostic procedure
STEP
1 PERFORM DTC CONFIRMATION PROCEDURE
• Perform "DTC Confirmation Procedure".
(See F2–85 DTC CONFIRMATION
PROCEDURE)
• Is same DTC present during KOEO or KOER
self-test?
2 INSPECT POOR CONNECTION OF IAT
SENSOR NO.1 CONNECTOR
• Turn engine switch to OFF.
• Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
• Is there any malfunction?
3 CLASSIFY IAT SENSOR NO.1 MALFUNCTION
OR HARNESS MALFUNCTION
• Turn engine switch to ON (Engine OFF).
• Disconnect MAF/IAT sensor connector.
• Access IAT PID using WDS or equivalent.
• Is IAT PID below 0.1 V?
4 INSPECT IAT SENSOR NO.1 SIGNAL CIRCUIT
FOR SHORT TO GND
• Turn engine switch to OFF.
• Inspect continuity between MAF/IAT sensor
terminal D and body GND.
• Is there continuity?
ON-BOARD DIAGNOSTIC
D
E
D
C
B A
INSPECTION
4
5 6
60
5
6
91
HARNESS SIDE CONNECTOR
Yes Go to next step.
No Intermittent concern exists. Go to "Intermittent Concern
Troubleshooting".
(See F2–227 INTERMITTENT CONCERN
TROUBLESHOOTING)
Yes Repair or replace suspected terminal, go to Step 7.
No Go to next step.
Yes Go to next step.
No Replace MAF/IAT sensor, go to Step 7.
(See F2–36 INTAKE-AIR SYSTEM REMOVAL/
INSTALLATION)
Yes Repair or replace harness for short to GND, go to Step 7.
No Go to next step.
A6E407001082206
PCM
PCM
91
60
ACTION
F2–95
F2