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Published 01-14-2021 Control # 707-01
CARRIER
TMS9000-2 SERVICE MANUAL
Troubleshooting Diagnostic Trouble Codes:
J1939 Serial Communications
J1939 Troubleshooting Tests
1.
Take all measurements at ECU harness connector.
2.
Check for damaged or reversed J1939 wiring.
3.
Check for corroded or damaged wiring connector
problems such as opens or shorts to voltage or ground.
4.
Check for other J1939 devices which may be loading
down (inhibiting) J1939 communication.
ECU Wire Harness Connector: J1939 Serial
Communications Pins
Troubleshooting Diagnostic Trouble Codes:
Miscellaneous
1st Blink Code
Location
11
J1939
2nd
Blink
Code
Diagnostic Trouble
Code Description
Repair Information
1
J1939 Serial link
Loss of communications between the E-60 controller and other devices
connected to the J1939 link. Check for damaged or reversed J1939 wiring.
Check for corroded or damaged connectors. Verify ECU Configuration. Check
for other devices inhibiting J1939 communications.
2
J1939 Retarder
Loss of communications between the E-60 controller and other devices
connected the J1939 link. Check for damaged or reversed J1939 wiring. Check
for corroded or damaged connectors. Verify presence of retarder on the J1939
link. Verify ECU Configuration. Check for other devices inhibiting J1939
communications.
3
J1939 Engine Communications
Loss of communications between the E-60 controller and the engine ECU over
the J1939 link. Check for damaged or reversed J1939 wiring. Check for
corroded or damaged connectors. Verify presence of engine ECU on the J1939
link. Verify ECU Configuration. Check for other devices inhibiting J1939
communications.
FIGURE 8-74
Connector
Pin
J1939
X1
18 Way
7
J1939 Low
8
J1939 High
1st Blink Code
Location
12
Miscellaneous
2nd
Blink
Code
Diagnostic Trouble
Code Description
Repair Information
1
Stop Lamp Switch Not Detected
ECU has not detected the presence of the stop lamp switch since ignition
power was applied (note that stop lamp switch input may be applied to the E-
60
controller using either hardwire input or J1939). Apply and release service
brake. Check for brake switch input into ECU (see system wiring schematic).
With service brake released, check for presence of the stop lamp bulb. With
service brake applied, verify system voltage is now present at the stop lamp
switch input to the ECU. Check for damaged wiring between ECU, stop lamp
switch and bulb. Check for corroded or damaged connectors. Check for
damaged or reversed J1939 wiring. Check for corroded or damaged
connectors on J1939 link. Verify presence of engine ECU on the J1939 link.
Verify ECU configuration.
Fo
r
Reference
Only