Nissan Sentra Service Manual: Ecu diagnosis information

Ipdm e/r (intelligent power distribution module engine room)

Reference Value

Values on the diagnosis tool

Terminal layout

Physical values

Fail-Safe

Can communication control

When can communication with ecm and bcm is impossible, ipdm e/r performs fail-safe control. After can communication recovers normally, it also returns to normal control.

If no can communication is available with ecm

If no can communication is available with bcm

Ignition relay malfunction detection function

• Ipdm e/r monitors the voltage at the contact circuit of the ignition relay inside and ignition switch status from bcm via can communication.
• Ipdm e/r judges the ignition relay error if the voltage differs between the contact circuit and the ignition switch status from bcm via can communication.
• If the ignition relay cannot turn off due to contact seizure, it activates the tail lamp relay for 10 minutes to alert the user to the ignition relay malfunction when the ignition switch is turned off.

Front wiper protection function

Ipdm e/r detects front wiper stop position by a front wiper stop position signal.

When a front wiper stop position signal is in the conditions listed below, ipdm e/r stops power supply to wiper after repeating a front wiper 10 seconds activation and 20 seconds stop.

Note:

This operation status can be confirmed on the ipdm e/r “data monitor” that displays “block” for the item “wip prot” while the wiper is stopped.

DTC Index

Note:

• The details of time display are as follows.

• Crnt: a malfunction is detected now.
• Past: a malfunction was detected in the past.

• Ign counter is displayed on ffd (freeze frame data).

• The number is 0 when is detected now.
• The number increases like 1 → 2 В·В·В· 38 → 39 after returning to the normal condition whenever IGN OFF → ON.
• The number is fixed to 39 until the self-diagnosis results are erased if it is over 39.