F–84
ON-BOARD DIAGNOSTIC
Diagnostic procedure
End Of Sie
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 POOR CONNECTION OF MAF
SENSOR CONNECTOR
• Turn ignition key to OFF.
• Disconnect the MAF/IAT sensor connector.
• Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
• Is there any malfunction?
Yes Repair or replace terminals, then go to Step 7.
No Go to next step.
3 INSPECT POWER SUPPLY CIRCUIT FOR OPEN
CIRCUIT
• Turn ignition key to ON (Engine OFF).
• Inspect voltage at MAF/IAT sensor terminal B
(harness-side).
• Is there voltage B+?
Yes Go to next step.
No Inspect for open circuit in wiring harness between MAF/IAT
sensor terminal B (harness-side) and main relay.
Repair or replace harness, then go to Step 7.
4 INSPECT POOR CONNECTION OF PCM
CONNECTOR
• Turn ignition key to OFF.
• Disconnect PCM connector.
• Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
• Is there any malfunction?
Yes Repair terminal, then go to Step 7.
No Go to next step.
5 INSPECT MAF SENSOR SIGNAL CIRCUIT FOR
OPEN CIRCUIT
• Remove PCM with PCM connector connected.
• Inspect for continuity between MAF/IAT sensor
terminal C (harness-side) and PCM terminal
1P (harness-side).
• Is there any continuity?
Yes Go to next step.
No Repair or replace suspected harness, then go to Step 7.
6 INSPECT MAF SENSOR SIGNAL CIRCUIT FOR
SHORTS
• Inspect continuity between following circuits:
— MAF/IAT sensor terminal C (harness-side)
and body ground
— MAF/IAT sensor connector terminal C
(harness-side) and B (harness-side)
• Are there any continuity?
Yes Repair or replace suspected harness, then go to next step.
No Replace MAF/IAT sensor, then go to next step.
7 VERIFY TROUBLESHOOTING OF DTC P0102
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear DTC from memory using WDS or
equivalent.
• Perform KOEO/KOER self-test.
(See F–66 KOEO/KOER SELF-TEST.)
• Is same DTC present?
Yes Replace PCM, then go to next step.
(See F–43 PCM REMOVAL/INSTALLATION.)
No Go to next step.
8 VERIFY AFTER REPAIR PROCEDURE
• Perform “After Repair Procedure”.
(See F–66 AFTER REPAIR PROCEDURE.)
• Is there any DTC present?
Yes Go to applicable DTC troubleshooting.
(See F–67 DTC TABLE.)
No Troubleshooting completed.
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