53105-ZW1-700 Honda PIPE, THROTTLE (Honda Code 4900098).

Illustration 1 g01378744
Schematic for the engine's lamp circuits
Note: There are configuration parameters that are associated with the low coolant level lamp and the maintenance indicator lamp. Ensure that these parameters are configured correctly prior to troubleshooting the lamp circuits. Refer to Troubleshooting, "Configuration Parameters" for information that is related to the configuration of the lamp circuits.
Illustration 2 g01377328
Locations of the connectors that are associated with the lamp circuits (rear engine view)
(1) J1/P1 ECM connectors
(2) Customer connectors
Illustration 3 g01378791
Location of the connector for the engine mounted control panel (top view)
(3) Control panel connector
Illustration 4 g01367230
Terminal locations at the P1 ECM connector that are for the lamp circuits
(P1-12) Overspeed lamp
(P1-19) Diagnostic lamp
(P1-20) Warning lamp
(P1-21) Maintenance indicator lamp
(P1-28) Low oil pressure lamp
(P1-29) High coolant temperature lamp
(P1-30) Low coolant level lamp
Illustration 5 g01378839
Terminal locations at the P1 backup ECM connector that are for the lamp circuits
(P1-19) Diagnostic lamp
(P1-28) Backup ECM active lamp
(P1-29) Backup ECM ready lamp
Illustration 6 g01378844
Terminal locations at the customer connector that are for the lamp circuits
(Terminal 20) Low coolant level lamp
(Terminal 21) High coolant temperature lamp
(Terminal 22) Maintenance indicator lamp
(Terminal 23) Diagnostic lamp
(Terminal 24) Low oil pressure lamp
(Terminal 25) Warning lamp
(Terminal 27) Backup ECM active lamp
(Terminal 28) Backup ECM ready lamp
Illustration 7 g01389974
Terminal locations at the connector for the control panel that are for the lamp circuits
(Terminal 27) Backup ECM active lamp
(Terminal 28) Backup ECM ready lamp
(Terminal 26) Overspeed lamp
Table 1
Troubleshooting Test Steps Values Results
1. Inspect the Electrical Connectors and the Wiring
A. Remove electrical power from the ECM.
B. Thoroughly inspect connectors (1), (2), and (3). Also, thoroughly inspect any of the other connectors that are associated with the lamp circuits. Refer to the Schematic of the engine for connector locations. Refer to Troubleshooting, "Electrical Connectors - Inspect".
C. Perform a 45 N (10 lb) pull test on each of the wires for the lamp circuits.
D. heck the torque of the allen head screw on the ECM connectors and the customer connectors. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
E. Check the harness and the wiring for abrasion and for pinch points from the dash display back to the ECM.
Connectors, Pins, and Sockets
Result: The harness and connectors appear to be in good repair. Proceed to Test Step 2.
Result: The connectors and/or wiring need repair.
Repair the wiring and/or the connectors. Replace parts, if necessary. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled. Verify that the repair eliminates the problem.
STOP
2. Check for Proper Operation of the Lamp Circuits
A. Connect Cat ET to the service tool connector.
B. Restore electrical power to the ECM. Turn the keyswitch to the ON position.
C. Select the "Override Parameters"option from the "Diagnostic Tests" on Cat ET.
D. Use the correct override parameter to power the circuit for the suspect lamp.
E. Remove electrical power from the ECM. Turn the keyswitch to the OFF position.
Lamp Circuits
Result: The suspect lamp illuminates when the override is on.
There does not appear to be a problem with the lamp circuit at this time. The problem may have been related to a faulty connection in the harness. Carefully reinspect the connectors and wiring.
STOP
Result: The suspect lamp does not illuminate when the override is on. Inspect the lamp and the lamp socket for the suspect circuit. Use a lamp socket that is known to be operational to check the condition of the lamp, if necessary. If either of the components are questionable, replace the component. Retest the circuit. If the problem persists or if the components of the lamp assembly appear to be in good repair, proceed to Test Step 3.
3. Use the Override to Check the Wiring