Nissan Altima 2007-2012 Service Manual: ECU diagnosis


Reference Value


Terminal Layout

Physical Values

1: Sedan only

2: With LH front window anti-pinch

3: With LH and RH front window anti-pinch

4: With Intelligent Key

5: Without Intelligent Key

Wiring Diagram-Coupe

Wiring Diagram-Sedan

Fail Safe

DTC Inspection Priority Chart

If some DTCs are displayed at the same time, perform inspections one by one based on the following priority chart.

DTC Index


Details of time display

• CRNT: Displays when there is a malfunction now or after returning to the normal condition until turning ignition switch OFF → ON again.

• 1 - 39: Displayed if any previous malfunction is present when current condition is normal. It increases like 1 → 2 → 3...38 → 39 after returning to the normal condition whenever ignition switch OFF → ON. The counter remains at 39 even if the number of cycles exceeds it. It is counted from 1 again when turning ignition switch OFF → ON after returning to the normal condition if the malfunction is detected again.

    Combination switch output circuit
    Diagnosis Procedure 1. CHECK OUTPUT 1 - 5 SYSTEM CIRCUIT FOR OPEN 1. Turn the ignition switch OFF. 2. Disconnect the BCM and combination switch. 3. Check continuity between BCM harness connect ...

    Symptom diagnosis
    COMBINATION SWITCH SYSTEM SYMPTOMS Symptom Table 1. Perform the data monitor of CONSULT-III to check for any malfunctioning item. 2. Check the malfunction combinations. 3. Identify the malfu ...

    Other materials:

    Differential side oil seal
    Exploded View 1. CVT assembly 2. Differential side oil seal Removal and Installation REMOVAL 1. Remove drive shaft assembly. Refer to FAX-11, "Removal and Installation (Left Side)" and FAX-12, "Removal and Installation (Right Side)". 2. Remove the differential sid ...

    Does not operate by key cylinder switch
    Diagnosis Procedure 1. PERFORM INITIALIZATION PROCEDURE Perform initialization procedure. Refer to PWC-295, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement". Is the inspection result normal? YES >> GO TO 2 NO >> Repair or replace the mal ...

    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 signal) exists. DTC Logic DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1.INSPECTION START ...