Workshop

HYDRA-MATIC 6L80 (6 Speed)

DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
DTC DESCRIPTION DTC TYPE*
*DTC TYPES
A
A
A
A
A
C
C
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A - Emission-related, turns the MIL "ON" immediately after the 1st failure.
C - Non-emission-related, no lamps and may display message on driver information center.
B - Emission-related, turns the MIL "ON" after two consecutive drive cycles with failure.
Figure 24
P1825
P1831
P1832
P1876
P2534
P2714
P2715
P2719
P2720
P2721
P2723
P2724
P2728
P2729
P2730
P2762
P2763
P2764
Internal Mode Switch, Invalid Range
Clutch Pressure Control (CPC) Solenoid 4, System Performance.
Clutch Pressure Control (CPC) Solenoid 5, System Performance.
TCC Pressure Control (PC) Solenoid, System Performance.
TCC Pressure Control (PC) Solenoid, Circuit Voltage High.
TCC Pressure Control (PC) Solenoid, Circuit Voltage Low.
Clutch Pressure Control (CPC) Solenoid 4, Circuit Voltage Low.
Clutch Pressure Control (CPC) Solenoid 4, Stuck OFF.
Clutch Pressure Control (CPC) Solenoid 5, Stuck OFF.
Clutch Pressure Control (CPC) Solenoid 4, Stuck ON.
Clutch Pressure Control (CPC) Solenoid 5, Stuck ON.
Clutch Pressure Control (CPC) Solenoid 5, Circuit Voltage Low.
Clutch Pressure Control (CPC) Solenoid 5, Circuit Voltage High.
Clutch Pressure Control (CPC) Solenoid 4, Circuit Voltage High.
P1915 Internal Mode Switch, Start In Wrong Range.
Ignition Switch, Start Circuit Voltage Low.
Shift Valve 1, Performance of Clutch Select Valve 2.
P1686 TCM (Internal), Power Up Temperature Sensor, Circuit Voltage High.
TCM (Internal), Driver No. 2, (Controls Line Pressure & Shift Lock Solenoids).
TCM (Internal), Driver No. 2, (Controls Line Pressure & Shift Lock Solenoids).
Up and Down Shift Switch Performance, Range Switch Not In D3.
P1751
P1685
TCM (Internal), Power Up Temperature Sensor, Circuit Voltage Low.
If for any reason, the entire electronic control system of the transmission, or any one of the electrical
components within the Control Solenoid Body and TCM Assembly becomes disabled, the transmission will
default to fail-safe mode. If the transmission is in 1st, 2nd or 3rd gear during an electrical failure, the
transmission will default to 3rd gear. If the transmission is in 4th, 5th or 6th gear during an electrical failure, the
transmission will default to 5th gear.
If for any reason, the entire electronic control system of the transmission fails, the line pressure control
solenoid will be OFF, and maximum line pressure will be the result. This will create harsh engagements. The
TCC PC solenoid would also be OFF, resulting in no torque converter clutch apply.
FAIL-SAFE OR PROTECTION MODE
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
21
Copyright © 2007 ATSG

Leave a Reply

Your email address will not be published. Required fields are marked *