Nissan Altima 2007-2012 Service Manual: P1722 Estm vehicle speed signal

Description

The vehicle speed signal is transmitted from ABS actuator and electric unit (control unit) to TCM by CAN communication line.

DTC Logic

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION: Always drive vehicle at a safe speed. NOTE: If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch OFF.

Then wait at least 10 seconds before performing the next test.

1.CHECK DTC DETECTION

1. Turn ignition switch ON.

2. Select “DATA MONITOR”.

3. Start engine and maintain the following conditions for at least 5 consecutive seconds.

Is “P1722 ESTM VEH SPD SIG” detected? YES >> Go to TM-176, "Diagnosis Procedure".

NO >> Check intermittent incident. Refer to GI-42, "Intermittent Incident".

Diagnosis Procedure

1.CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

Perform “SELF-DIAG RESULTS” mode for “ABS”.

Is the inspection result normal? YES >> GO TO 2.

NO >> Check DTC detected item. Refer to BRC-121, "DTC No. Index" (TCS/ABS), BRC-223, "DTC No.

Index" (VDC/TCS/ABS).

2.CHECK DTC WITH TCM

Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.

Is “P1722 ESTM VEH SPD SIG” detected? YES >> Replace TCM. Refer to TM-254, "Exploded View".

NO >> GO TO 3.

3.DETECT MALFUNCTIONING ITEMS

Check TCM connector pin terminals for damage or loose connection with harness connector.

Is the inspection result normal? YES >> Replace TCM. Refer to TM-254, "Exploded View".

NO >> Repair or replace damaged parts.

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