Nissan Sentra Service Manual: Ecu diagnosis information

Bcm

Reference value

NOTE:

The Signal Tech II Tool (J-50190) can be used to perform the following functions. Refer to the Signal Tech II User Guide for additional information.

• Activate and display TPMS transmitter IDs
• Display tire pressure reported by the TPMS transmitter
• Read TPMS DTCs
• Register TPMS transmitter IDs
• Test remote keyless entry keyfob relative signal strength

VALUES ON THE DIAGNOSIS TOOL

Terminal layout

Physical values

Fail-safe

Fail-safe control by dtc

Bcm performs fail-safe control when any dtc are detected.

Fail-safe control of combination switch reading function caused by low power supply voltage

If voltage of battery power supply lower, BCM maintains combination switch reading to the status when input voltage is less than approximately 9 V.

Note:

When voltage of battery power supply is approximately 9 v or more, combination switch reading function returns to normal operation.

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

Note:

Details of time display

• Crnt: displays when there is a malfunction now or after returning to the normal condition until turning ignition switch off ƒ¸ 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.

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