Procedure B

PROCEDURE B: BCM SUB-HARNESS INSTALLATION & BCM REPLACEMENT

NOTE:
Procedure B (Sub-Harness Install/BCM Replace) is split up into two sections:

^ Section 1: For Titan/Armada vehicles.

^ Section 2: For Pathfinder/Frontier/Xterra vehicles.

CAUTION:
Use suitable covers to protect upholstery, carpet, trim, etc. when performing this procedure.

Section 1: Titan/Armada Procedure

1. If you determined the BCM needs to be replaced (from Procedure A Terminal Check),

^ First perform BCM "Read Configuration" using CONSULT-II.

^ To do this, refer to "READ CONFIGURATION PROCEDURE" in section "BCS" in the applicable service manual.

2. Record all radio station presets and then disconnect the negative battery cable.

CAUTION:
The complete repair needs to be conducted within one hour of disconnection of the battery. If the battery is left disconnected for longer than one hour, the idle setting may be lost and the vehicle may have difficulty starting.

3. Remove the Driver's Side Instrument Panel Lower Cover (see Figure 3).

^ Remove two Screws at the lower corners of the Lower Cover.

^ Carefully pull the cover rearward to release the securing clips.

^ Disconnect all wire harness connectors from the panel.

4. Remove four Bolts and remove the Driver's Side Lower Knee Protector (see Figure 4).

5. Remove the LH Instrument Lower Cover next to the Accelerator Pedal (see Figure 5).

^ Carefully pull outward to release the Securing Clips.

6. If the BCM needs to be replaced as confirmed by Procedure A Terminal Check, go ahead and replace the BCM now. Then continue with step # 8 (below).

^ Remove all three Harness Connectors from the BCM (see Figure 6).

^ Remove the two BCM Mounting Bolts and remove BCM (see Figure 6).

^ Install new BCM.

^ Reconnect the top connector ONLY (as viewed in Figure 6).

7. If the BCM does not need to be replaced,

^ Install the new Sub-Harness.

^ Start by disconnecting ONLY the two vertical Connectors at the BCM (see Figure 6).

8. Connect the fuse end of the BCM Sub-Harness to the BCM as shown in Figure 7.

^ Make sure the connectors are securely connected ("snapped" in place) to the BCM.

9. At the other end of the BCM Sub-Harness:

^ Connect the White Connector to the vehicle-side harness white connector (see Figure 8a).

^ Then connect the Black Connector to the vehicle-side harness black connector (see Figure 8b).

^ Make sure the connectors are securely connected ("snapped" in place).

10. Secure the new BCM Sub-Harness to the Existing Vehicle Harness (see Figure 9).

^ Use the Tie Wrap that comes already attached to the new Sub-Harness.

11. Re-connect the negative battery cable.

12. Confirm the installed BCM Sub-Harness does not interfere with the operation of the adjustable pedal assembly.

NOTE:
It is okay if the BCM Sub-Harness has slight contact with the adjustable pedal assembly when the pedal assembly is adjusted to the end of its upward travel (closest to the driver).

13. For vehicles without a trailer lights wiring connector, confirm BCM operation as follows:

a. Turn the ignition switch ON.

b. Place your hand on the new BCM Sub-Harness.

c. Activate the left turn indicator (blinker) and confirm a "click" is felt / heard each time the left turn indicator light flashes.

d. Activate the right turn indicator (blinker) and confirm a "click" is felt / heard each time the right turn indicator light flashes.

e. Apply the brake pedal and confirm a "click" is felt / heard when the brake lights come on.

^ If you feel / hear a "clicking" noise when performing steps c, d, and e, go to the next step.

^ If you do not feel / hear a "clicking" noise when performing steps c, d, and e, replace the BCM, then go to the next step.

14. Re-install all components in reverse order of removal.

15. Re-program all radio station presets.

16. If the BCM was replaced, you'll need to do the following:

IMPORTANT:
You MUST perform the following steps according to the applicable service manual to ensure the new BCM is properly programmed to the original vehicle settings.

^ BCM "Write Configuration" using CONSULT-II. Refer to "WRITE CONFIGURATION PROCEDURE" in section "BCS" of the applicable service manual.

^ Initialization of NATS System and Registration of all NATS Ignition Key I.D.s. Refer to Nissan Technical Bulletin NTB03-031b.

^ I.D. Registration Procedure of the Low Tire Pressure Warning System. Refer to "I.D. REGISTRATION PROCEDURE" in section "WT" of the applicable service manual.

^ Register I.D. Code for Remote Keyless Entry Keyfobs. Refer to section "BL" of the applicable service manual.

^ BCM Headlamp Configuration. Refer to "HEAD LAMP" information in section "LT" of the applicable service manual.

Section 2: Pathfinder/Frontier/Xterra Procedure

1. If you determined the BCM needs to be replaced (from Procedure A Terminal Check),

^ First perform BCM "Read Configuration" using CONSULT-II.

^ To do this, refer to "READ CONFIGURATION PROCEDURE" in section "BCS" in the applicable service manual.

2. Record all radio station presets and then disconnect the negative battery cable.

^ Carefully lift upward to release the securing clips.

4. Carefully reposition the Driver's Door Rubber Welt away from the Instrument Panel Side Trim (see Figure 11).

5. Carefully remove the Front Pillar Lower Finisher by pulling it rearward to release the Securing Clips (see Figure 12).

6. Remove two Screws and remove the Drivers Side Instrument Panel Lower Cover (see Figure 13).

^ Carefully pull the Cover rearward to release the Securing Clips.

^ Disconnect all Harness Connectors from the Lower Cover.

7. Remove two Bolts and remove the Knee Protector Brace (see Figure 14).

8. If the BCM needs to be replaced as confirmed by Procedure A Terminal Check, go ahead and replace the BCM now. Then continue with step # 10.

^ Remove all three Harness Connectors from the BCM (see Figure 15).

^ Remove the two BCM Mounting Bolts and remove BCM (see Figure 15).

^ Install the new BCM.

^ Reconnect the RH connector ONLY (as viewed in Figure 15.)

9. If the BCM does not need to be replaced:

^ Install the new Sub-Harness.

^ Start by disconnecting ONLY the two horizontal Connectors at the BCM (see Figure 15).

12. Secure the new BCM Sub-Harness by snapping the Attachment Clip into the Instrument Panel Bracket Hole (see Figure 18).

13. Re-connect the negative battery cable.

14. For vehicles without a trailer lights wiring connector, confirm BCM operation as follows:

a. Turn the ignition switch ON.

b. Place your hand on the new BCM Sub-Harness.

c. Activate the left turn indicator (blinker) and confirm a "click" is felt / heard each time the left turn indicator light flashes.

d. Activate the right turn indicator (blinker) and confirm a click" is felt / heard each time the right turn indicator light flashes.

e. Apply the brake pedal and confirm a click" is felt / heard when the brake lights come on.

^ If you feel / hear a clicking" noise when performing steps c, d, and e, go to the next step.

^ If you do not feel / hear a clicking" noise when performing steps c, d, and e, replace the BCM, then go to the next step.

15. Re-install all components in reverse order of removal.

16. Re-program all radio station presets.

17. If the BCM was replaced, you'll need to do the following:

IMPORTANT:
You MUST perform the following steps according to the applicable service manual to ensure the new BCM is properly programmed to the original vehicle settings.

^ BCM "Write Configuration" using CONSULT-II. Refer to WRITE CONFIGURATION PROCEDURE" in section BCS" of the applicable service manual.

^ Initialization of NATS System and Registration of all NATS Ignition Key I.D.s. Refer to Nissan Technical Bulletin NTB03-031b.

^ I.D. Registration Procedure of the Low Tire Pressure Warning System. Refer to I.D. REGISTRATION PROCEDURE" in section "WT" of the applicable service manual.

^ Register I.D. Code for Remote Keyless Entry Keyfobs. Refer to section "BL" of the applicable service manual.

^ BCM Headlamp Configuration. Refer to "HEADLAMP" information in section "LT" of the applicable service manual.