SECTION D: DIAGNOSTIC TROUBLE CODE (DTC)
TRDU™ tool LED QUICK REFERENCE
Power
System OK - A solid green VLT LED indicates proper voltage is reaching the module. If no red LEDs are on, then no DTC's are detected.
If the ABS indicator lamp is on with no red LEDs, Go To Section E, page 27.
Voltage Out of Range - A flashing green VLT LED indicates ECU voltage below 8.0 VDC or above 16.0 VDC. The VLT LED will flash until power is brought into normal range. Go to Section F, page 28.
No Voltage - When the VLT LED is off, the module is receiving very low or no voltage, or there is no communication to TRDU. The ECU LED may be on in this case. Go to Section F, page 28.
ABS Modulator DTC
The red M1, M2 and/or M3 LED is on to indicate a DTC with an ABS modulator. The example above shows the LEDs illuminated when there is a DTC for a second ABS modulator (MOD2).
The indicated modulator DTC may be static or dynamic. Static DTCs are related to wiring or component failures such as open or short circuits.
Dynamic modulator DTCs are related to abnormal wheel speed behaviors during ABS.
Go to Section H, page 30.
Magnetic Reset - All LEDs will be on while a magnet is held in place at the RESET location near the “B” in Bendix. When held for less than 6 seconds, the
ODO DTCs are cleared. When held for more M1 than 6 seconds,the ABS configuration is
reset. If one or more LEDs do not illuminate, replace the TRDU™ tool. Do not reset the DTC codes until troubleshooting of the indicated component is complete.
Wheel Speed Sensor DTC
The red SEN LED is on to indicate a DTC with a wheel speed sensor. The example above shows the LEDs illuminated when there is an additional right sensor (SAR) DTC.
Troubleshooting and repair are the same for a DTC on any wheel speed sensor. The indicated sensor DTC may be static or dynamic.
Static DTCs are related to wiring or component failures such as open or short circuits.
Dynamic DTCs are related to abnormal wheel speed signals or behaviors.
Go To Section G, page 29.
ECU DTC
The red ECU LED is on to indicate a DTC internal to the
If the red ECU LED is on and the green VLT LED is off, the module may have very low voltage. In this case, go to Section F.
Odometer Mileage - The TRDU will continously display the odometer information (x1000) by flashing the blue ODO LED. There will be a 20 second pause between ODO displays.
As an example: 152,431 miles will be displayed as:
152 (x1000) ... or 1 blink (pause), 5 blinks (pause), 2 blinks.
Zeros are displayed by the blue ODO LED strobing twice.
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