PREVOST H3-45 2023 Operator's Manual page 268

C-14 Allison Transmission Other Features
DTC
P0973 Shift Solenoid 1 (SS1) Control Circuit Low
P0974 Shift Solenoid 1 (SS1) Control Circuit High
P0976 Shift Solenoid 2 (SS2) Control Circuit Low
P0977 Shift Solenoid 2 (SS2) Control Circuit High
P097A Shift Solenoid 1 (SS1) Control Circuit Open
P097B Shift Solenoid 2 (SS2) Control Circuit Open
P0989 Retarder Pressure Sensor Circuit Low
P0990 Retarder Pressure Sensor Circuit High
P1739 Incorrect Low Gear Ratio
P1790 Gear Shift Module 1 Calibrated Invalid
P1791 Gear Shift Module 2 Calibrated Invalid
P1891 Throttle Position Sensor PWM Signal Low
P1892 Throttle Position Sensor PWM Signal High
Engine Coolant Temperature Sensor 2 Circuit Low
P2184
Input
Engine Coolant Temperature Sensor 2 Circuit High
P2185
Input
P2637 Torque Management Feedback Signal (A)
P2641 Torque Management Feedback Signal (B)
P2669 Actuator Supply Circuit Voltage 2 Open (HSD2)
P2670 Actuator Supply Voltage 2 (HSD2) Low
P2671 Actuator Supply Voltage 2 (HSD2) High
Description
PA-1652 Operator's Manual H3-45 Coach
CHECK Inhibited Operation
Light Description
DNS, SOL OFF (hydraulic
Yes
default)
DNS, SOL OFF (hydraulic
Yes
default)
7-speed: Allow 2 through 6,
N, R
Yes
Inhibit TCC operation
7-speed: Allow 2 through 6,
Yes
N, R
Yes Lock in range
7-speed: Allow 2 through 6,
Yes
N, R
No None
No None
Command 2
Yes
shifts 2 through 6, N, R
Shift selector language or
Yes
units incorrect
Shift selector language or
Yes
units incorrect
No Use default throttle values
No Use default throttle values
Use default engine coolant
No
values
Use default engine coolant
No
values
Yes Inhibit SEM
Yes Inhibit LRTP
SOL OFF,
Yes operation,
modulation, ONA
DNS, SOL OFF (hydraulic
Yes
default)
DNS, SOL OFF (hydraulic
Yes
default)
nd
and allow
Inhibit TCC
Inhibit Main