NHTSA ID Number: 11016934
Manufacturer Communication Number: SD-27-5023V
TSB/Document Date: 2025-04-10
Summary
Bendix
GSBC (Global Scalable Brake Control) System and EBS-90 Electronic Control Unit (ECU) service data sheets.
0xD0018F
53249
143
Lost Communication With
EPM0: Erratic
Inconsistent communications between EPM
and GSBC ECU.
SD-27-5031
0xD0021F
53250
31
Lost Communication With
EPM1: Circuit Intermittent
EPM internal electrical failure.
SD-27-5031
0xD0028F
53250
143
Lost Communication With
EPM1: Erratic
Inconsistent communications between EPM
and GSBC ECU.
SD-27-5031
0xD0031F
53251
31
Lost Communication With
EPM2: Circuit Intermittent
EPM internal electrical failure.
SD-27-5031
0xD0038F
53251
143
Lost Communication With
EPM2: Erratic
Inconsistent communications between EPM
and GSBC ECU.
SD-27-5031
0xD0041F
53252
31
Lost Communication With
EPM3: Circuit Intermittent
EPM internal electrical failure.
SD-27-5031
0xD0048F
53252
143
Lost Communication With
EPM3: Erratic
Inconsistent communications between EPM
and GSBC ECU.
SD-27-5031
Table 20 - GSBC EPM-90 Diagnostic Trouble Codes (DTCs)
SD-27-5023V Rev 000 Bendix® GSBC® System and EBS-90™ (Global Scalable Brake Control System and Electronic Control Unit)
63
Troubleshooting
GSBC E-TPCM-90 DTCS
IMPORTANT
For all repair steps, first complete the following:
1. Generate an ACom Diagnostic Software report.
2. Clear DTCs.
3. Continue with repair information for each active DTC that will not clear.
NOTE: After completing all repairs, drive the vehicle to ensure the repairs were sufficient.
4. Once repairs have been made, clear the DTC again.
SD-27-5036, AVAILABLE ON B2BENDIX.COM
GSBC ETPCM-90 DTCS
DTC #
SPN
(J1939)
FMI
(J1939)
0x500022
20480
34
Signal amplitude greater than
maximum
eTPCM sensor signal voltage is higher than
4.5V
SD-27-5036
0x500028
20480
40
Signal bias level out of range/
zero adjustment failure
Measured voltage never comes into the offset
range (0.5-0.85V)
SD-27-5036
0x50002A
20480
42
Signal stuck in range
Sensor supply is too high or too low;
electrical failure in the central ECU
SD-27-5036
Circuit short to battery
Damage in the wiring (low resistance to UB)
and/or connectors between eTPCM and
GSBC ECU, damaged eTPCM, or GSBC
ECU
SD-27-5036
SD-27-5036
0x500112
20481
18
DTC NAME
DTC DESCRIPTION
SD SHEET
0x500114
20481
20
Circuit short to ground or open
Damage in the wiring (low insulation
resistance to vehicle ground or interruption)
and/or connectors between eTPCM and
GSBC ECU, damaged eTPCM, or GSBC
ECU
0x500149
20481
73
Internal electronic failure
Valve low side shorted to other eTPCM
valve's low side
SD-27-5036
Circuit short to battery
Damage in the wiring (low resistance to UB)
and/or connectors between eTPCM and
GSBC ECU, damaged eTPCM, or GSBC
ECU
SD-27-5036
SD-27-5036
0x500212
20482
18
0x500214
20482
20
Circuit short to ground or open
Damage in the wiring (low insulation
resistance to vehicle ground or interruption)
and/or connectors between eTPCM and
GSBC ECU, damaged eTPCM, or GSBC
ECU
0x500249
20482
73
Internal electronic failure
Short circuit between eTPCM OV and other
eTPCM valve
SD-27-5036
Circuit short to battery
Damage in the wiring (low resistance to UB)
and/or connectors between eTPCM and
GSBC ECU, damaged eTPCM, or GSBC
ECU
SD-27-5036
0x500312
20483
18
Table 21 – GSBC e-TPCM-90 Diagnostic Trouble Codes (DTCs)
64
SD-27-5023V Rev 000 Bendix® GSBC® System and EBS-90™ (Global Scalable Brake Control System and Electronic Control Unit)
Troubleshooting
GSBC ETPCM-90 DTCS
DTC #
SPN
(J1939)
FMI
(J1939)
DTC NAME
DTC DESCRIPTION
SD SHEET
0x500314
20483
20
Circuit short to ground or open
Damage in the wiring (low insulation
resistance to vehicle ground or interruption)
and/or connectors between eTPCM and
GSBC ECU, damaged eTPCM, or GSBC
ECU
0x500349
20483
73
Internal electronic failure
Short circuit between eTPCM backup
solenoid (BV) and other eTPCM valve
SD-27-5036
SD-27-5036
SD-27-5036
0x500616
20486
22
Circuit voltage below threshold
Damaged wiring (interruption or low
resistance towards ground) or connectors
or damage of the eTPCM or damage of the
GSBC ECU
0x500617
20486
23
Circuit voltage above threshold
Damaged wiring (low resistance towards
other wires) or connectors or damage of the
eTPCM or damage of the GSBC ECU
SD-27-5036
0x500711
20487
17
Circuit short to ground
eTPCM common high side shorted to ground
or short circuit
SD-27-5036
0x500712
20487
18
Circuit short to battery
eTPCM common high side shorted to battery
SD-27-5036
0x500713
20487
19
Circuit open
eTPCM common high side open circuit or
broken wire
SD-27-5036
0x508866
20616
102
Signal has too many
transitions/events
eTPCM solenoid activation count exceeds
lifetime limit
SD-27-5036
0x508872
20616
114
Actuator stuck open
Residual pressure trapped in the eTPCM
valve's control volume (pressure threshold
exceeded)
SD-27-5036
Actuator stuck closed
Difference between the eTPCM demand and
measured pressure exceeds limit (1.5 bar in
static situation or an implausible inlet valve
actuation is detected)
SD-27-5036
SD-27-5036
0x508873
20616
115
0x508899
20616
153
Exceeded learning limit
The actuation count of the eTPCM solenoids
are compared with a pre-configured limit; if
actuation count reaches the 95% of the limit,
this fault is set
0x50B677
20662
119
Commanded position not
reachable
eTPCM delivery pressure not detected during
temporary backup mode test
SD-27-5036
0x50B678
20662
120
Alignment or adjustment
incorrect
eTPCM delivery pressure not detected during
temporary brake test
SD-27-5036
Table 21 – GSBC e-TPCM-90 Diagnostic Trouble Codes (DTCs)
SD-27-5023V Rev 000 Bendix® GSBC® System and EBS-90™ (Global Scalable Brake Control System and Electronic Control Unit)
65
Troubleshooting
GSBC FBM-40 DTCS
IMPORTANT
For all repair steps, first complete the following:
1. Generate an ACom Diagnostic Software report.
2. Clear DTCs.
3. Continue with repair information for each active DTC that will not clear.
NOTE: After completing all repairs, drive the vehicle to ensure the repairs were sufficient.
4. Once repairs have been made, clear the DTC again.
SD-27-5028, AVAILABLE ON B2BENDIX.COM
GSBC FBM-40 DTCS
DTC #
SPN
(J1939)
FMI
(J1939)
0x507141
20593
65
0x507142
20593
66
0x507149
20593
73
0x50714A
20593
74
Incorrect
Component
Installed
0x50714B
20593
75
Over Temperature
0x507192
20593
146
0x507194
20593
148
0x507211
20594
17
0x507212
20594
18
0x507282
20594
130
0x507287
20594
135
0x507294
20594
148
DTC NAME
DTC DESCRIPTION
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
- Ideal for hydraulic and disc brakes
- Ideal for hydraulic and disc brakes
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
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TSB/Document ID: SD-27-5023V
Replacement Service Bulletin Number:
MFR Communication Date: 2025-04-10
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SERVICE BRAKES
MFR Component System:
MFR Component Subsystem:
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