Specifications

CONFIDENTIAL
Bendix Commercial Vehicle Systems LLC
Elyria, OH 44036
PRODUCT SPECIFICATION - BW-283-PR
SPEC. BW-283-PR
73 SHEETS
SHEET NO. 44
1st
Digit
2nd
Digit
Fault Description Repair Information
J1587
(SID)
J1587
(FMI)
Modulator MOD (AUX1 through AUX5)
8 2
MOD2 Release solenoid (AUX4)
shorted or open
49
3, 4, 5 or
12
9 2
MOD3 Release solenoid (AUX2)
shorted or open
• Check for corroded/damaged wiring or connectors
between the ECU and MOD2/3 (AUX4/2)
• At the 18-pin ECU harness connector:
- If MOD2 or MOD3, verify:
 3 – 8 ohms resistance across release solenoid to
common
 6 – 16 ohms resistance across hold solenoid to
release solenoid
- If AUX4 or AUX2, verify:
 No continuity from AUX leads to ground.
 +12V is not measured at the AUX leads.
• At the device harness connector:
- If MOD2 or MOD3, verify:
 No continuity from modulator leads to ground
 +12V is not measured at the modulator leads with
power applied to TABS6
- If AUX4 or AUX2, verify:
 Continuity of the AUX wiring to auxiliary device
 No continuity from AUX wiring to any other ECU
18-pin connector pins
• At the device connector:
- If MOD2 or MOD3, verify:
 3 – 8 ohms resistance across release solenoid to
common (Pins 2 to 1)
 6 – 16 ohms resistance across hold solenoid to
release solenoid (Pins 1 to 3)
- If AUX4 or AUX2, verify:
 Expected resistance for auxiliary device
• Replace/repair MOD2/3 (AUX4/2) wiring or components
as required.
• After repairs or if no issues found, then clear faults.
• If faults return, replace the TABS6 Module.
50
3, 4, 5 or
12
7 3 MOD1 ABS modulator dynamic error 7 7
8 3 MOD2 ABS modulator dynamic error 8 7
9 3 MOD3 ABS modulator dynamic error
• No wheel response to ABS command between the ECU
and MOD1.
• Verify proper MOD activation with brake pressure
applied, at power-up (Chuff Test) and/or using diagnostic
tool.
• For MOD2 or MOD3, verify correct wiring (not reversed)
between 18-pin ECU and MOD harness connectors
• Possible slow brake release, check for:
- Dragging brakes
- Dry bearings
- Faulty return springs
- Parking brake system faults
- Restricted brake air lines
- Over adjusted slacks
- Out of round drums
- Damaged/ loose tone rings.
• Repair/replace MOD2/3 wiring/valve, TABS6 module or
any other brake component as required.
9 7
8 4 MOD2 Valve configuration error 8 13
9 4 MOD3 Valve configuration error
• Verify correct ABS configuration using blink codes or
other diagnostic tools
• If needed, reset to the default ABS configuration and
power-up to initiate auto-configuration.
9 13
Table 12: Blink Code – Fault Description & Repair Information (Cont.)
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