Maxima SE V6-3.0L (VQ30DE) (1998)
ON BOARD DIAGNOSIS LOGIC
DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE
Perform "Procedure for malfunction A" first. If the 1st trip DTC cannot be confirmed, perform "Procedure for malfunction B". If the 1st trip DTC is not
confirmed on "Procedure for malfunction B", perform "Procedure for malfunction C".
Procedure for malfunction A
NOTE: If "DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch "OFF"
and wait at least 5 seconds before conducting the next test.
Without Scan Tools
(1) Turn ignition switch "ON" and wait at least 10 seconds.
(2) Turn ignition switch "OFF", wait at least 5 seconds and then turn "ON".
(3) Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
Procedure for malfunction B
NOTE: If "DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch "OFF"
and wait at least 5 seconds before conducting the next test.
Without Scan Tools
(1) Start engine and warm it up to normal operating temperature.
(2) Turn ignition switch "OFF" and wait at least 5 seconds.
(3) Start engine.
(4) Let engine idle and wait at least 15 seconds.
(5) Turn ignition switch "OFF", wait at least 5 seconds and then turn "ON".
(6) Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
Procedure for malfunction C
CAUTION: Always drive vehicle at a safe speed.
NOTE: If "DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch "OFF"
and wait at least 5 seconds before conducting the next test.
OVERALL FUNCTION CHECK
Use this procedure to check the overall function of the front heated oxygen sensor circuit. During this check, a 1st trip DTC might not be confirmed.