Your Vehicle: 2009 Nissan-Datsun Altima V6-3.5L (VQ35DE)
 
Vehicle » A L L Diagnostic Trouble Codes ( DTC ) » Testing and Inspection » P Code Charts » P0703 » CVT RE0F09B  
 
 
  CVT RE0F09B  
 

P0703 STOP LAMP SWITCH

Description
BCM detects ON/OFF state of the stop lamp switch and transmits the data to the TCM via CAN communication by converting the data to a signal.

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
With CONSULT-III

  1. Turn ignition switch ON.
  2. Start engine.
  3. Start vehicle for at least 3 consecutive seconds.
  4. Perform "SELF-DIAG RESULTS" mode for "TRANSMISSION". Is "P0703 BRAKE SW/CIRC" detected?

YES >> Go to Diagnosis Procedure.
NO >> Check intermittent incident. Refer to See: Testing and Inspection\Initial Inspection and Diagnostic Overview\Service Information For Electrical Incident\Intermittent Incident.

Diagnosis Procedure
1.CHECK STOP LAMP SWITCH CIRCUIT

  1. Check and adjust the installation position of stop lamp switch. Refer to .

  

  1. Turn ignition switch OFF.
  2. Disconnect BCM harness connector M18.
  3. Turn ignition switch ON.
  4. Check voltage between BCM harness connector M18 terminal 26 and ground.

  

Is the Inspection result normal?
YES >> GO TO 5.
NO >> GO TO 2.
2.CHECK HARNESS BETWEEN STOP LAMP SWITCH AND BCM (PART 1)

  

  1. Turn ignition switch OFF.
  2. Disconnect stop lamp switch harness connector.
  3. Check continuity between stop lamp switch harness connector E38 (A) terminal 2 and BCM harness connector M18 (B) terminal 26.

  

Is the Inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace damaged parts.
3.CHECK HARNESS BETWEEN STOP LAMP SWITCH AND BCM (PART 2)

  

Check continuity between BCM harness connector M18 terminal 26 and ground.

  

Is the Inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace damaged parts.
4.CHECK STOP LAMP SWITCH
Check stop lamp switch. Refer to Component Inspection (Stop Lamp Switch).
Is the Inspection result normal?
YES >> Check the following.

  • Harness for short or open between battery and stop lamp switch
  • 10A fuse (No. 7, located in fuse block) NO >> Repair or replace stop lamp switch.

5.CHECK BCM
With CONSULT-III

  1. Turn ignition switch OFF.
  2. Connect BCM connector.
  3. Turn ignition switch ON.
  4. Select "BRAKE SW 1" in "DATA MONITOR" of "BCM" and verify the proper operation of ON/OFF. Refer to See: Body and Frame\Body Control Systems\Testing and Inspection\Pinout Values and Diagnostic Parameters\Reference Value. Is the Inspection result normal?

YES >> GO TO 6.
NO >> Replace BCM. Refer to See: Body and Frame\Body Control Systems\Body Control Module\Service and Repair.
6.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 See: Powertrain Management\Transmission Control Systems\Control Module, CVT\Service and Repair\CVT RE0F09B\Exploded View.
NO >> Repair or replace damaged parts.

Component Inspection (Stop Lamp Switch)
1.CHECK STOP LAMP SWITCH

  

Check continuity between stop lamp switch terminals 1 and 2.

  

Is the Inspection result normal?
YES >> Inspection END
NO >> Replace stop lamp switch. See: Brakes and Traction Control\Hydraulic System\Brake Master Cylinder\Service and Repair\Removal and Replacement\Exploded View.