Fault Code 145: Secondary Shift Device (PWM)
J1939: SA 3 SPN 752 FMI 2, 4, 5, 8, 12, 13, 14
Overview
The Transmission Control Module (TCM) is configured to accept Primary Shift Device messages from the transmission driver interface device over the Primary Data Link (J1939A). This information is used to determine transmission operation.
A Secondary Shift Device request signal from the transmission driver interface device is also provided on a separate hardwired circuit. The Secondary Shift Device request signal allows a driver to engage the transmission into a Shift Mode in the event the Primary Shift Device message is not available.
The Primary Data Link (J1939A), transmission driver interface device, and Secondary Shift Device hardwired circuit and wiring are installed by the OEM and connect to the TCM through the 20-Way TCM Vehicle Harness Connector.
Detection
The TCM monitors Secondary Shift Device request signal. If the signal is not received or invalid, the fault is set Active.
Conditions to Set Fault Code Active
FMI 2 – Data Erratic: Secondary Shift Device request signal value out of range for 5 seconds.
FMI 4 – Voltage Below Normal or Shorted Low: Secondary Shift Device request circuit shorted to ground for 5 seconds.
FMI 5 – Current Below Normal or Open Circuit: Secondary Shift Device request circuit shorted to power or open for 5 seconds.
FMI 8 – Abnormal Frequency: Secondary Shift Device request signal frequency out of range for 5 seconds.
FMI 12 – Bad Intelligent Device: Inappropriate acceptance of non-Neutral Shift Mode without Service Brake depressed.
FMI 13 – Out of Calibration: Driver Interface Device incorrectly configured.
FMI 14 – Special Instructions: Delayed gear engagement after Shift Mode change.
Fallback
FMI 2, 4, 5, 8:
- Amber warning lamp on
- If vehicle is moving and fault codes 135 and 145 are Active:
- Non-Neutral modes prohibited
- PTO mode prohibited
- Hill Start Aid prohibited
- Engine cranking prohibited
- If vehicle is not moving and fault codes 135 and 145 are Active:
- Urge to Move and Creep Mode prohibited
- Non-Neutral modes prohibited
- PTO mode prohibited
- Hill Start Aid prohibited
- Engine cranking prohibited
FMI 12:
- Amber warning lamp on
- Urge to Move and Creep Mode prohibited
- Non-Neutral modes prohibited
- PTO mode prohibited
- If vehicle is moving
- Red stop lamp on
FMI 13:
- Amber warning lamp on
- Red stop lamp on
- If vehicle is moving:
- Non-Neutral modes prohibited
- PTO mode prohibited
- Hill Start Aid prohibited
- Engine cranking prohibited
- If vehicle is not moving:
- Urge to Move and Creep Mode prohibited
- Non-Neutral modes prohibited
- PTO mode prohibited
- Hill Start Aid prohibited
- Engine cranking prohibited
FMI 14:
- Coast Mode and Neutral Coast prohibited
- Urge to Move and Creep Mode prohibited
- Inertia Brake activation prohibited
- Upshifts prohibited
- Clutch engagements prohibited
- Non-Neutral modes prohibited
- PTO mode prohibited
Conditions to Set Fault Code Inactive
FMI 2: Secondary Shift Device request signal in range for 10 seconds.
FMI 4: Secondary Shift Device request signal not shorted to ground for 10 seconds.
FMI 5: Secondary Shift Device request signal not shorted to power or open for 10 seconds.
FMI 8: Secondary Shift Device request signal frequency in range for 10 seconds.
FMI 12, 14: Key cycle and fault condition no longer exist.
FMI 13: Driver Interface Type properly configured in TCM or condition no longer exists.
Possible Causes
FMI 2, 4, 5, 8:
- Vehicle Components
- OEM Driver Interface Device
- Freightliner and Western Star incorrectly configured in TCM
- Internal failure
- Vehicle Harness
- Wiring shorted to power, shorted to ground or open
- Terminals bent, spread, corroded, or loose
- TCM
- Internal Failure
FMI 12, 14:
- TCM
- Software Issue
- Internal Issue
FMI 13:
- TCM
- Driver Interface Type not configured
Note: Refer to OEM for troubleshooting a failed system.
Additional Tools
- Endurant XD Service Manual TRSM0960
- Digital Volt Ohm Meter (DVOM)
Component Identification
 |
1. 20-Way TCM Vehicle Harness Connector 2. Transmission Control Module (TCM) 3. 9-Way Transmission Driver Interface Device Connector (OEM Specific) 4. 9-Way Type 2 Diagnostic Connector (In Cab) |
 |
1. Transmission Control Module (TCM) 2. 20-Way TCM Vehicle Harness Connector 3. 9-Way Transmission Driver Interface Device Connector (OEM Specific) 4. 9-Way Type 2 Diagnostic Connector - OEM Specific CD (in cab) 5. 9-Way Type 2 Diagnostic Connector - OEM Specific FG (in cab) |
 |
Fault Code 145 Troubleshooting
Set vehicle parking brake and chock wheels.
Record transmission fault codes, FMIs, occurrences, and timestamps from Service Activity Report created during the Diagnostic Procedure.
If Fault Code 145 is Inactive and there are other Active vehicle or transmission fault codes, troubleshoot all Active fault codes. Go to Step V
If Fault Code 145 FMI 4 and Fault Code 210 FMI 4 are both set Active or Inactive, troubleshoot per Fault Code 210: Transmission Oil Pressure (Fluid Pressure Sensor).
If Fault Code 145 FMI 5 is Active and OEM is Freightliner or Western Star, connect ServiceRanger, Go To Configuration, select Vehicle and configure Driver Interface Device to J1939 CAN Device (Freightliner and Western Star only). Process complete.
If Fault Code 145 FMI 2, 4, 5, 8 is Inactive, Go to Step B
If Fault Code 145 FMI 2, 4, 5, 8 is Active, Go to Step C
If Fault Code 145 FMI 12, 14 is Active or Inactive, Contact Eaton Cummins Automated Transmission Technologies for further diagnostic instructions. For Help Line phone numbers, go to Contact Information. Go to Step V
If Fault Code 145 FMI 13 is Active, configure Driver Interface Type in TCM using ServiceRanger. Go to Step V
If Fault Code 145 FMI 13 is Inactive, Driver Interface Type is configured in TCM. Go to Step V
Key on with engine off.
Connect ServiceRanger.
Go To “Service Routines”.
Start “Product Diagnostic Test” and follow on-screen prompts.
Note: Solid “PD” may appear in display when PD Test is active.
Note: TCM will not enter PD Test mode when there are Active fault codes.
Wiggle vehicle harness and connections between transmission driver interface device and 20-Way TCM Vehicle Connector. Check for signs of rubbing or chafing on the wires. Refer to OEM wiring diagrams.
To end test, press stop button.
If fault codes set Active, refer to OEM guidelines for repair or replacement of vehicle harness and/or 20-Way TCM Vehicle Harness Connector. Go to Step V
If no fault codes become Active, Go to Step C
Key off.
Disconnect 9-Way transmission driver interface device connector.
Inspect 9-Way transmission driver interface device connector, verify connector is free from contamination and corrosion; terminals are not bent, spread or loose; and there is no damage to connector body.
Key on with engine off.
Measure voltage between 9-Way transmission driver interface device connector Pin 1 (TCM supplied 12v) and Pin 2 (TCM supplied ground). Record reading in table.
Note: Refer to OEM transmission driver interface device wiring diagrams.
Compare reading(s) in table.
If readings are in range, Go to Step D
If readings are out of range, refer to OEM guidelines for repair or replacement of transmission driver interface device power supply circuits between 9-Way transmission driver interface device connector and 20-Way TCM Vehicle Connector. Go to Step V
| Pins | Range | Reading(s) |
|---|---|---|
| 1 to 2 | 11–13 V |
Key off.
Disconnect 20-Way TCM Vehicle Harness Connector from TCM.
Inspect 20-Way TCM Vehicle Harness Connector, verify connector is free from contamination and corrosion; terminals are not bent, spread or loose; and there is no damage to connector body.
Measure resistance between 9-Way transmission driver interface device connector Pin 4 and 20-Way TCM Vehicle Harness Connector Pin 9. Record reading in table.
Note: Refer to OEM wiring diagrams.
Measure resistance between 9-Way transmission driver interface device connector Pin 4 and Ground. Record reading in table.
Compare reading(s) in table.
If readings are in range, Go to Step E
If readings are out of range, refer to OEM guidelines for repair or replacement of Secondary Shift Device request circuit between 9-Way transmission driver interface device connector and 20-Way TCM Vehicle Connector. Go to Step V
| Pins | Range | Reading(s) |
|---|---|---|
| 4 to 9 | 0.0 –0.3 Ohms | |
| 4 to Ground | Open Circuit (OL) |
Key off.
Reconnect all connectors and verify all components are properly installed.
Key on with engine off.
Connect ServiceRanger.
Go To “Fault Codes”.
Retrieve and record fault codes, FMIs, occurrences and timestamps.
If Fault Code 145 is Active, refer to OEM guidelines for repair or replacement of the transmission driver interface device. Go to Step V
If Fault Code 145 is Inactive, no problem was found. The intermittent nature of the fault makes it likely that the problem is in the following. Contact OEM for further diagnostic instructions. Go to Step V
- Transmission driver interface device
- Secondary Shift Device hardwired circuit between the transmission driver interface device and 20-Way TCM Vehicle Connector.
- Power and ground supply wiring to transmission driver interface device from 20-Way TCM Vehicle Connector.
Key off.
Reconnect all connectors and verify all components are properly installed.
Key on with engine off.
Connect ServiceRanger.
Go To “Fault Codes”.
Select “Clear All Faults”.
Operate vehicle and attempt to reset the fault code or duplicate the previous complaint.
Check for fault codes using ServiceRanger.
If no fault codes set and vehicle operates properly, test complete.
If Fault Code 145 sets Active, Go to Step A
If a fault code other than 145 sets Active, troubleshoot per the Fault Code Isolation Procedure Index.