Nissan Altima 2007-2012 Service Manual: C1734 control unit

Description

An internal malfunction has been detected in the TPMS function of the BCM.

DTC Logic

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.CHECK SELF-DIAGNOSTIC RESULTS

1. On SELECT DIAG MODE, select the SELF-DIAG RESULT screen.

2. Check display contents on SELF DIAG RESULT screen.

Is C1734 displayed in the self-diagnosis display? YES >> Refer to WT-20, "Diagnosis Procedure".

NO >> Inspection End.

Diagnosis Procedure

MALFUNCTION CODE NO. 53 (DTC C1734)

1.SELF-DIAGNOSTIC RESULTS

1. On “SELECT DIAG” mode, select the “SELF-DIAG RESULT” screen for BCM.

2. Check display contents on “SELF-DIAG RESULT”.

Does self-diagnostic results indicate any DTC other than C1734? YES >> Perform trouble diagnosis for DTC. Refer to BCS-91, "DTC Index".

NO >> GO TO 2.

2.CHECK BCM HARNESS CONNECTORS

Check BCM harness connectors for damage or loose connections.

Are the BCM harness connectors damaged or loose? YES >> Repair or replace damaged parts.

NO >> GO TO 3.

3.BCM POWER SUPPLY AND GROUND

Check BCM power supply and ground. Refer to BCS-42, "Diagnosis Procedure".

Are the power supply and grounds normal? YES >> GO TO 4.

NO >> Repair power supply or grounds as necessary.

4.CHECK HARNESS BETWEEN BCM AND TIRE PRESSURE RECEIVER

1. Turn ignition switch “OFF” 2. Disconnect BCM harness connector M18 (A) and tire pressure receiver harness connector M70 (B).

3. Check continuity between BCM harness connector and tire pressure receiver harness connector.

Does continuity exist? YES >> GO TO 5.

NO >> Repair circuits as necessary.

5.BCM INPUT/OUTPUT SIGNALS

Check BCM input/output signals. Refer to BCS-47, "Reference Value".

Are the inputs and outputs normal? YES >> Inspection End.

NO >> Replace BCM. Refer to BCS-96, "Removal and Installation".

Special Repair Requirement

Perform preliminary check. Refer to WT-5, "Preliminary Check".

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