TM 5-3805-290-23-1
ELECTRICAL SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
0013 00
CAN DATA LINK CIRCUIT TEST
0013 00
N OT E
Use this procedure if another procedure has directed you here and if any of these diagnostic codes are active:
a.
342-2 Loss of Secondary Engine Speed Signal.
b.
174-02 Fuel Temperature Sensor Data Erratic.
c.
320-02 Speed/Timing Sensor Mechanical Failure.
d.
1684-14 Fuel Injection Pump no Communication.
CAN data link is communication link between ECM and fuel injection pump. CAN data link uses J1:48/P40:1
CAN+ and J1:58/P40:2 CAN- connections to communicate with ECM.
CAN data link is used to communicate engine timing, fuel demand to the fuel injection pump, data from fuel
injection pump, and status of fuel injection pump.
Failure in CAN data link causes engine to shut down and engine to not start.
If no communication between ECM and fuel injection pump occurs, a 1684-14 diagnostic code will be accom-
panied by 174-02 and 320-02 diagnostic codes.
If 1684-14 is active and 174-02 and 320-02 are NOT active, then problem is intermittent loss of communica-
tions.
1.
Check for problem with power delay to fuel injection pump under either of these conditions:
a.
ECM has been activated and 1684-14 is active while 174-02 and 320-02 are not active.
b.
1684-14 is repeatedly logged after engine start switch is turned ON.
N OT E
DO NOT attempt to repair wiring harness between ECM and fuel injection pump. If wiring harness is
damaged, wiring harness must be replaced.
