Mazda 626 Station Wagon, Workshop Manual

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ON-BOARD DIAGNOSTIC
STEP
INSPECTION ACTION
5 INSPECT IAT SENSOR SIGNAL CIRCUIT FOR
SHORT TO POWER
• Turn ignition key to ON (Engine OFF).
• Measure voltage between IAT sensor
terminal A (harness-side) and body ground.
• Is voltage B+?
Yes Repair or replace harness, then go to Step 9.
No
Go to next step.
6 INSPECT POOR CONNECTION OF PCM
CONNECTOR
• Disconnect PCM connector.
• Check for poor connection (damaged,
pulled-out terminals, corrosion, etc.).
• Are there any malfunctions?
Yes Repair or replace terminal, then go to Step 9.
No Go to next step.
7 INSPECT IAT SENSOR SIGNAL CIRCUIT FOR
OPEN
• Check continuity between IAT sensor
terminal A (harness-side) and PCM terminal
39.
• Is there any continuity?
Yes
Go to next step.
No Repair or replace harness, then go to Step 9.
8 INSPECT ECT SENSOR GROUND CIRCUIT
FOR OPEN
• Check continuity between IAT sensor
terminal B (harness-side) and PCM terminal
91.
• Is there any continuity?
Yes Go to next step.
No Repair or replace harness, then go to next step.
9 VERIFY TROUBLESHOOTING OF DTC P0113
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear DTC from PCM memory using NGS
tester.
• Turn ignition key to ON (Engine OFF).
• Is same DTC present?
Yes Replace PCM, then go to next step.
No Go to next step.
10 VERIFY AFTER REPAIR PROCEDURE
• Perform “After Repair Procedure.”
(See F1-3 6 AFTER REPAIR PROCEDURE)
• Are there any DTCs present?
Yes Go to applicable DTC inspection.
(See F1-37 DTC TABLE)
No
Troubleshooting completed.
F1-48