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:

    Steering switch
    Description When one of the steering wheel audio control switches is pushed, the resistance in steering switch circuit changes depending on which button is pushed. Diagnosis Procedure 1.CHECK STEERING SWITCH RESISTANCE 1. Disconnect steering switch connector M88. 2. Check resistance betw ...

    Door switch
    Description Detects door open/close condition and transmits the signal to BCM. Component Function Check 1. CHECK DOOR SWITCH INPUT SIGNAL Check (“DOOR SW-DR” and “DOOR SW-AS”) in “DATA MONITOR” mode with CONSULT-III. Refer to BCS- 34, "RETAINED PWR : CONSULT-III Function (BC ...

    Can communication system
    System Description • CAN communication is a multiplex communication system. This enables the system to transmit and receive large quantities of data at high speed by connecting control units with two communication lines (CAN-H and CAN-L). • Control units on the CAN network transmit si ...