Nissan Altima 2007-2012 Service Manual: P1148 Closed loop control
DTC Logic
DTC DETECTION LOGIC
NOTE: DTC P1148 is displayed with another DTC for A/F sensor 1.
Perform the trouble diagnosis for the corresponding DTC.
P0850 PNP Switch
Description When the shift lever position is P or N (CVT), Neutral position (M/T), park/neutral position (PNP) switch is ON. ECM detects the position because the continuity of the line (the ON s ...P1217 engine over temperature
DTC Logic DTC DETECTION LOGIC NOTE: • If DTC P1217 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX. • If DTC P1217 is displayed with DTC P0607, first perfor ...Other materials:
Rear window defogger relay
Description
Power is supplied to the rear window defogger with BCM control.
Component Function Check
1. CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT
Check that an operation noise of rear window defogger relay [located in fuse
block (J/B)] can be heard when
turning the rear window de ...
Lan system circuit
Description
SYMPTOM: Mode door motor, intake door motor and/or air mix door motor does
not operate normally.
Diagnosis Procedure
DIAGNOSIS PROCEDURE FOR LAN CIRCUIT
1.CHECK POWER SUPPLY FOR DOOR MOTORS
1. Press ignition switch ON.
2. Check voltage between front air control connector M37 ...
Air conditioning cut control
System Diagram
System Description
INPUT/OUTPUT SIGNAL CHART
*1: This signal is sent to the ECM through CAN communication line.
*2: ECM determines the start signal status by the signals of engine speed and
battery voltage.
SYSTEM DESCRIPTION
This system improves engine operation when th ...