Nissan Maxima Service and Repair Manual: DTC/Circuit diagnosis

  • U1000 Can comm circuit
  • Description DTC Logic DTC DETECTION LOGIC NOTE: U1000 can be set if a module harness was disconnected and reconnected, perhaps during a repair. Confirm that there are actual CAN diagnostic symptoms and a present DTC by performing the Self Diagnostic Result procedure. Diagnosis Procedure 1. PERFORM SELF DIAGNOSTIC Turn ignition switch ON and wait for 2 seconds or more. Check "SELF- DIAG RESULTS ".

  • U1010 Control unit (CAN)
  • DTC Logic DTC DETECTION LOGIC Diagnosis Procedure 1. REPLACE BCM When DTC U1010 is detected, replace BCM.

  • U0415 Vehicle speed sig
  • Description U0415 is displayed if any unusual condition is present in the reception status of the vehicle speed signal from the ABS actuator and electric unit (control unit). DTC Logic DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1. DTC CONFIRMATION Erase the DTC. Turn ignition switch OFF. Perform the "SELF-DIAG RESULTS" of BCM with CONSULT, after the ignition switch has been turned ON for 2 seconds or more. Diagnosis Procedure 1. ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF DIAGNOSTIC RESULT Perform Self Diagnostic Result of ABS actuator and electric unit (control unit) with CONSULT 2.

  • B2562 Low voltage
  • DTC Logic DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1. DTC CONFIRMATION Erase DTC. Turn ignition switch OFF. Perform the "SELF-DIAG RESULTS" of BCM with CONSULT, after the ignition switch has been turned ON for 1.5 seconds or more. Diagnosis Procedure 1. CHECK BATTERY VOLTAGE Check battery voltage 2. CHECK POWER SUPPLY CIRCUIT AND GROUND CIRCUIT Check BCM power supply circuit and ground circuit. Special Repair Requirement 1. REQUIRED WORK WHEN REPLACING BCM Initialize control unit.

  • Power supply and ground circuit
  • Diagnosis Procedure 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 BCM. Check voltage between BCM harness connector and ground. 3. CHECK GROUND CIRCUIT Check continuity between BCM harness connector and ground. Special Repair Requirement 1.

  • Combination switch input circuit
  • Diagnosis Procedure 1. CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR OPEN Turn the ignition switch OFF. Disconnect the BCM and combination switch. Check continuity between BCM harness connector and combination switch harness connector. 2. CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR SHORT Check for continuity between BCM harness connector and ground. 3. CHECK BCM OUTPUT SIGNAL Connect the BCM and the combination switch connector. Turn ON any switch in the system that is malfunctioning. Check voltage between BCM harness connector and ground Special Repair Requirement 1.

  • Combination switch output circuit
  • Diagnosis Procedure 1. CHECK OUTPUT 1 - 5 SYSTEM CIRCUIT FOR OPEN Turn the ignition switch OFF. Disconnect the BCM and combination switch. Check continuity between BCM harness connector and combination switch harness connector 2. CHECK OUTPUT 1 - 5 SYSTEM CIRCUIT FOR SHORT Check for continuity between BCM harness connector and ground. 3. CHECK BCM INPUT VOLTAGE Connect the BCM and the combination switch connector. Check voltage between BCM harness connector and ground. Special Repair Requirement 1.

Diagnosis system (BCM)

U1000 Can comm circuit