92101-06018-4J Honda BOLT, HEX. (6X18) (Honda Code 2945145).

Table 1
Diagnostic Codes Table
J1939 Code and Description Conditions which Generate this Code System Response
51-9 Engine Throttle Position : Abnormal Update Rate The Electronic Control Module (ECM) did not receive the required message from the throttle actuator. The code is logged.
The amber warning lamp is illuminated.
The red stop lamp is illuminated.
173-9 Engine Exhaust Gas Temperature : Abnormal Update Rate The ECM did not receive the required message from the exhaust temperature module. The code is logged.
The amber warning lamp is illuminated.
The red stop lamp is illuminated.
843-9 Operator Control Panel : Abnormal Update Rate The ECM has not received an expected message relating to the engine state control from the operator control panel. Check that the operator display is connected properly and is receiving power. The code is logged.
The amber warning lamp is illuminated.
The red stop lamp is illuminated.
The engine is shut down.
1442-9 Engine Fuel Valve 1 Position : Abnormal Update Rate The ECM did not receive the required message from the throttle actuator. The code is logged.
The amber warning lamp is illuminated.
The red stop lamp is illuminated. The CAN data link is used to communicate information between the ECM and other control modules that are on the engine. Use this procedure to troubleshoot problems with the CAN data link.This procedure identifies the following problems:
Faulty connectors
Missing termination resistors
Short circuits
Open circuits
Faulty display panelA -9 code that is related to any specific control module may be caused by the power supply circuit to the control module. Be sure to check that the suspect control module is receiving the power before you troubleshoot the circuit for the CAN data link. If you suspect that a power supply circuit may be the cause of the -9 code, troubleshoot the power supply problem first.Note: This engine can be configured by the customer to allow the engine control status to be read from the CAN data link. The parameter for Engine State Control Input Configuration must be set to "CAN Input" for this control. Customer connections for the CAN data link must be made at the terminal strip that is inside the display panel. The customer must provide the control switch, the wiring, and the termination resistor for this configuration.A problem with the CAN data link is probably caused by the following problems:
Short circuit to ground
Open circuit in the harness
Short circuit to another voltage sourceThe next likely cause is a problem with a control module that is connected to the data link. The least likely cause is a problem with the ECM.
Illustration 1 g02404882
Schematic for the CAN 1 data link
Illustration 2 g02406580
Schematic for the CAN 2 data link
Illustration 3 g02417796
Locations of the components that are on the CAN data links
(1) ECM control box
(2) Throttle actuator
(3) Display panel
(4) Fuel actuator Test Step 1. Inspect the Electrical Connectors and the Wiring
Remove the electrical power from the ECM.
Illustration 4 g02416456
Location of the connectors at the ECM (right front engine view)
(5) J1/P1 ECM connectors for the fuel control solenoid
(6) CAN 1 termination resistor
(7) J2/P2 ECM connectors for the fuel control solenoid
(8) CAN 2 termination resistor
(9) Service tool connector that is on the engine
(10) CAN 1 termination resistor
Illustration 5 g02418597
Locations of the components at the display panel
(11) Operator Display Panel (OCP)
(12) CAN 2 termination resistor
(13) 120-Pin connector for the OCP
(14) Service tool connector at the display panel
Thoroughly inspect connectors (5), (7), (9), and (14). Also, thoroughly inspect connectors (2) and (4) that are for the actuators. Inspect the connectors for termination resistors (6), (8), (10), and (12). Carefully inspect connector (13) that is for OCP (13). Ensure that you inspect the interconnect harness from the engine to the operator display panel for damage. Refer to Testing and Adjusting, "Electrical Connectors - Inspect" for details.
Illustration 6 g01391850
Terminal locations at the P1 ECM connector that are associated with the CAN 1 data link
(P1-34) CAN data link −
(P1-42) CAN shield
(P1-50) CAN data link +
Illustration 7 g02418916
Terminal locations at the P2 ECM connector that are associated with the CAN 2 data link
(P2-11) CAN data link −
(P2-12) CAN data link +
(P2-23) CAN shield
Illustration 8 g02418938
Terminal locations for the CAN 2 data link at the fuel actuator
(Terminal 4) CAN data link +
(Terminal 6) CAN d