IK0800445 - Body Controller Updates for 500k Baud

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Availability: ISIS, Bus ISIS, FleetISIS, Body Builder, IsSIR

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Title : Body Controller Updates for 500k Baud
Applies To : All vehicles with 500k baud data link

Change Log
Please refer to the change log text box below for recent changes to this article:
11/05/2018 ‐ Added BCM programming harness instructions under Special Tools / Software and at Step 3 of Programmed BCM Installed on Vehicle with
a Different Baud Rate
10/16/2018 ‐ Added steps under 'Programmed BCM Installed on Vehicle with a Different Baud Rate' to correct a BCM programmed to the incorrect baud
rate
08/28/2017 ‐ Updated Figure 11 ‐ Programmed 500k BCM Installed on a 250k Vehicle, so the 'In Configuration' and 'Detected' tabs were clarified visually
06/16/2017 ‐ Added information for Non‐Multipexed 500k vehicles. Feature 0508096 (Figures 9‐10)

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Description
Overview of the recent updates to the Body Controller (BCM) on 500k baud data link equipped vehicles.
• Basic Overview
• Data Link Terminal Information
◦ 500k baud programmed BCM installed in 250k baud vehicle
• Grid Control Information
• Real Time Clock (RTC) Battery

Special Tools / Software
Tool Description

Tool
Number

Comments

Instructions

EZ‐Tech® or Electronic Service Tool (EST)
with
Diamond Logic Builder (DLB) Software

Harness, Body Control Programming

Programming Station with PCB

12‐999‐12

Used to bench program / re‐flash 250K and 500K Body Control.
Must be used in combination with ECM Programming Station 12‐801‐
01‐01 and
EZ‐Tech computer with Diamond Logic Builder (DLB) software loaded.

12‐801‐01‐
01

Control Module Programming Station. Part of 12‐801‐01.
This kit includes:
x1 pc of p/n: 12‐801‐01‐08 (12 Amp Power Supply),
x1 pc of p/n: 12‐801‐01‐09 (Cigarette Power Adapter)
x1 pc of p/n: 12‐801‐01‐10 (Battery Terminal Power Adapter).

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4328530R1

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IK0800445 - Body Controller Updates for 500k Baud

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Basic Overview
Figure 1 ‐ Gen 4 BCM

Figure 2 ‐ Gen II BCM

• The Gen 4 BCM is the correct service part for all vehicles equipped with a Body Controller. The Gen 4 BCM is backwards compatible with
trucks that were built with Gen II BCMs
◦ There is no Gen 3 BCM
• The same diagnostics are used on a Gen 4 BCM
• IK2600008 ‐ How to Diagnose Electrical Problems with Diamond Logic® Builder using a Session
• IK0800092 ‐ The First Check to Make When Troubleshooting Any Body Controller or ESC Issue
• IK2600007 ‐ How to Program a Blank/New BCM or ESC
( Return to Top )

Data Link Information
500k Baud Vehicles will have a GREEN diagnostic connector. The green connector has 500k and 250k data link wiring present.
Figure 3 ‐ 250k
Diagnostic Connector

Figure 4 ‐ 500k
Diagnostic Connector

• There are identifying feature codes for 500k ‐ Phase 1, 500k ‐ Phase 2, and Non Multiplexed vehicles

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IK0800445 - Body Controller Updates for 500k Baud

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• The wiring architecture is different on Phase 1, Phase 2, and Non Multiplexed vehicles
◦ 500k Phase 1 ‐ Feature 0508095 ‐ ELECTRICAL SYSTEM ENHANCED VCM FUNCTIONS for VCM Enhanced Functions
(Examples: ProStar, WorkStar, DuraStar with Green Diagnostic Connector)
◦ 500k Phase 2 ‐ Feature 0508097 ‐ ELEC SYS MUX COMMON ARCHITECTURE for Electrical Common Architecture System
(Examples: LT, RH ‐ All have Green Diagnostic Connector)
◦ 500k Non Multiplex ‐ Feature 0508096 ‐ ELECTRICAL SYSTEM VCM FUNCTIONS NON‐MUX for Vehicle Control Module Functions, for
Non‐Multiplexed Vehicles
(Example: HX, PayStar, 9900 with Green Diagnostic Connector)

500k Phase 1 Vehicles ‐ Feature 0508095:
Figure 5 ‐ 500k Baud Data Link Connector at the BCM on a 500k Phase 1 Vehicle (Feature 0508095)

Figure 6 ‐ 250k Baud Data Link Connector at the BCM on a 500k Phase 1 Vehicle (Feature 0508095)

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IK0800445 - Body Controller Updates for 500k Baud

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500k Phase 2 Vehicles ‐ Feature 0508097:
Figure 7 ‐ 250k Baud Data Link Connector at the BCM on a 500k Phase 2 Vehicle (Feature 0508097)

Figure 8 ‐ 250k Baud Data Link Connector at the BCM on a 500k Phase 2 Vehicle (Feature 0508097)

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IK0800445 - Body Controller Updates for 500k Baud

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500k Non Multipex Vehicles ‐ Feature 0508096:
Figure 9 ‐ 500k Baud Data Link Connector at the BCM on a 500k Non Multiplexed Vehicle (Feature 0508096)

Figure 10 ‐ 250k Baud Data Link Connector at the BCM on a 500k Non Multiplexed Vehicle (Feature 0508096)

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IK0800445 - Body Controller Updates for 500k Baud

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Programmed BCM Installed on Vehicle with a Different Baud Rate:
Figure 11 ‐ Programmed 500k BCM Installed on a 250k Vehicle

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IK0800445 - Body Controller Updates for 500k Baud

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• All Body Controllers are shipped blank and can be programmed to 500k or 250k.
• This issue would only occur if you are using a module that was already programmed.

1. You can use the BCM programming harness 12‐999‐12 along with the programming station 12‐801‐01‐01 to correct the issue in figure 11.
◦ Connect to the BCM, you will most likely find it is already programmed with a VIN.
◦ Once connected, program the BCM to the desired VIN.
◦ Reinstall the BCM into the desired vehicle.
◦ Connect with DLB and verify operation in vehicle.
2. Alternatively to step 4, you can also install the BCM into a different baud rate vehicle, and reprogram to correct the issue in figure 11.
◦ If you cannot connect to the BCM in a 250k baud rate vehicle, install the BCM into a 500k baud rate vehicle
◦ If you cannot connect to the BCM in a 500k baud rate vehicle, install the BCM into a 250k baud rate vehicle
◦ Attempt to connect to the BCM with the key off, you will most likely find it is already programmed with a VIN.
◦ Once connected, program the BCM to the desired VIN.
◦ Remove the BCM, and install it back into the desired vehicle.
◦ Connect with DLB and verify operation in vehicle.
3. Tool Instruction 4328530R1 for BCM Programming Harness
( Return to Top )

Grid Control
The BCM controls the power circuits for Ignition, Accessory and Cranking.
Accessory Grid Control output:

1605‐A Maximum Current: 20 Amps

Ignition Grid Control output:

1605‐B Maximum Current: 10 Amps

Starter Grid Control output:

1605‐T Maximum Current: 10 Amps

Below are the only conditions the Body Controller should observe for Key_Switch_State:
• Accessory Only
• Ignition and Accessory (Key on Engine Off or Key On Engine Running)
• Ignition and Starter input (Crank) ‐ (Accessory signal is removed during cranking)
If any other combinations of key switch state are observed a fault will be set. If the Accessory circuits are undercurrent or overcurrent a fault
will be set. The Body Controller will not supply power to the output when overcurrent or undercurrent faults are active. You must
troubleshoot the output wiring.
NOTE:
Do not diagnose these faults when INACTIVE without a driver complaint
Faults apply to Gen 4 Body Controllers with 500k Baud Only
SPN

FMI

520981

14

Body Controller (33)

Module and Source Address (SA)

Only Ignition input is being detected (status of Key_Switch_State = 1)

Description

520982

5

Body Controller (33)

Accessory Grid Undercurrent

520982

6

Body Controller (33)

Accessory Grid Overcurrent

520983

14

Body Controller (33)

Only Starter input is being detected (status of Key_Switch_State = 4)

520984

14

Body Controller (33)

Starter input and Accessory input are detected (status of Key_Switch_State
= 6)

520985

14

Body Controller (33)

Starter input, Accessory input, and Ignition input are detected (status of
Key_Switch_State = 7)

( Return to Top )

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IK0800445 - Body Controller Updates for 500k Baud

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Real Time Clock (RTC) Battery
500k baud vehicles utilize the BCM for Real Time Clock (RTC) functionality.
•
•
•
•

The RTC battery is integrated in the circuit board and cannot be removed
If the RTC battery fails, it will set fault code 516824‐1 and a service battery will need to be installed
The service battery plugs into the circuit board
The RTC battery part number is 2514328C91
Figure 12 ‐ Service Battery

•

RTC Service Battery
Figure 13 ‐ Battery Cover Removed

• If the battery needs to be serviced,
remove the battery cover to locate the
connector the service battery plugs into.

Figure 14 ‐ Service Battery Installed

• The service battery plugs into the circuit
board as shown.

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IK0800445 - Body Controller Updates for 500k Baud

BODY CONTROLLER REFERENCE

GENERATION

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4

THERE ARE TWO VERSIONS OF THE GENERATION 4 BODY CONTROLLER. HERE'S HOW TO IDENTIFY
THEM:

NAVISTAR TRUCK GROUP GENIV BODY
CONTROLLER
NAVISTAR P/N: 4044470C1 JOB NUM:
SRENA S/N: 00000000 MANUF DATE: 000000
SRENA P/N: 00000‐0000 ASSEMBLED IN MEXICO
SERVICE PART *

NAVISTAR TRUCK GROUP GENIV BODY
CONTROLLER
NAVISTAR P/N: 4044470C4 JOB NUM:
SRENA S/N: 00000000 MANUF DATE: 000000
SRENA P/N: 00000‐0000 ASSEMBLED IN MEXICO
SERVICE PART *

4044470C1

4044470C4

• Early release, installed on early 2015
vehicles.
• Communicates at 250k baud
• Capable of communicating with 2015 model
year vehicles and older.

• Current version of Generation 4 Body
Controller.
• Can communicate with 250k baud and 500k
baud data links.
• Can be installed on current model year and
older vehicles.

COMMUNICATION
BAUD RATE

COMMUNICATION
BAUD RATE

250k
500k
PLUG

A vehicle with a BLACK receptacle can
communicate at 250k baud.
A vehicle with a GREEN receptacle can
communicate at both 250k / 500k baud
(when properly programmed).

R
E
C

When connecting an Electronic Service
Tool (EST) to the vehicle:

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IK0800445 - Body Controller Updates for 500k Baud

E
P
T
A
C
L
E

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• A BLACK plug on an interface cable
will only connect with a BLACK
receptacle.
• The GREEN plug on an interface cable
will connect to both BLACK and
GREEN receptacles.

250k

250k
500k

( Return to Top )
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