ECM
Reference Value
VALUES ON THE DIAGNOSIS TOOL
NOTE:
Example: The ignition timing shown by the timing light may differ from the ignition timing displayed on the data monitor. This occurs because the timing light shows a value calculated by ECM according to signals received from the cam shaft position sensor and other sensors related to ignition timing.
For outlines of following items, refer to EC-138, "CONSULT Function".
*1: Accelerator pedal position sensor 2 signal and throttle position sensor 2
signal are converted by ECM internally. Thus, they differ
from ECM terminals voltage signal.
*2: Before measuring the terminal voltage, confirm that the battery is fully
charged.
TERMINAL LAYOUT
PHYSICAL VALUES
NOTE:
: Average voltage for pulse
signal (Actual pulse signal can be confirmed by oscilloscope.)
*1: This may vary depending on internal resistance of the tester.
*2: Before measuring the terminal voltage, confirm that the battery is fully
charged.
Fail safe
NON DTC RELATED ITEM
DTC RELATED ITEM
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
*1: 1st trip DTC No. is the same as DTC No.
*2: This number is prescribed by SAE J2012/ISO 15031-6.
*3: In Diagnostic Test Mode II (Self-diagnostic results), this number is
controlled by NISSAN.
*4: Refer to EC-31, "Description", "HOW TO ERASE PERMANENT DTC".
*5: The troubleshooting for this DTC needs CONSULT.
*6: When the fail-safe operations for both self-diagnoses occur, the MIL
illuminates.
*7: SRT code will not be set if the self-diagnostic result is NG.
*8: When the ECM is in the mode that displays SRT status, MIL may flash. For the
details, refer to "How to Display SRT Status".
*9: When erasing this DTC, always use CONSULT or GST.
Test Value and Test Limit
The following is the information specified in Service $06 of SAE J1979/ISO 15031-5.
The test value is a parameter used to determine whether a system/circuit diagnostic test is OK or NG while being monitored by the ECM during self-diagnosis. The test limit is a reference value which is specified as the maximum or minimum value and is compared with the test value being monitored.
These data (test value and test limit) are specified by On Board Monitor ID (OBDMID), Test ID (TID), Unit and Scaling ID and can be displayed on the GST screen.
The items of the test value and test limit will be displayed with GST screen which items are provided by the ECM. (e.g., if bank 2 is not applied on this vehicle, only the items of bank 1 are displayed)
Fuel pump
Description
*: ECM determines the start signal status by the signals of engine speed and
battery voltage.
The ECM activates the fuel pump for several seconds after the ignition switch is
turned ON to improve engine
start ability. If the ECM receives a engine speed signal from the camsh ...
Subwoofer AMP
Removal and Installation
Subwoofer amp. and bracket
Subwoofer amp. bracket screws
REMOVAL
Disconnect the battery negative terminal. Refer to PG-67, "Removal
and Installation (Battery)".
Remove the parcel shelf finisher. Refer to INT-28, "Removal and
Installation". NOTE: The ...
Power supply and ground circuit
BCM
BCM : Diagnosis Procedure
Regarding Wiring Diagram information, refer to BCS-67,
"Wiring Diagram".
1. CHECK FUSE AND FUSIBLE LINK
Check if the following BCM fuses or fusible link are
blown.
2. CHECK POWER SUPPLY CIRCUIT
Turn ignition switch OFF.
Disconnect B ...