Ecu (Electronic Control Unit) Connector Pin Reference; Control Relay Connector; Control Relay Pin Reference; General Information - Winnebago 1987-1989 LeSharo Service Manual

ENGINE FUEL SYSTEM
WIRE HARNESS CONNECTIONS
t.
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GENERAL INFORMATION
To simplify electrical tests, the wire harness
connector terminals and pins are assigned
reference numbers.
The ECU connector pin references appear on the
injection system wiring diagram. They are not
stamped on the connector.
ECU (Electronic Control Unit)
CONNECTORPIN REFERENCE
PIN
1 - Tach Voltage input
2 - Throttle Position Switch Idle Contact
3 - Throttle Position Switch WOT Contact
4 - Ignition Switch ("Hot" in Start Position)
5 - Vehicle Ground (Power Reference)
6 - Not Used
7 - Airflow Meter Potentiometer Source Voltage
8 - Airflow Meter Position Reference Voltage
(Output)
9 - Battery Voltage in Start or Run Condition
10 • Coolant Temperature Sensor
11 - To Position 11 at ECU
12 - Fuel Injectors
13 - Injector Circuit Ground
14 - Not Used
15 - Not Used
16 - Not Used
17 - Not Used
18 - Not Used
19 - Not Used
20 - Oxygen
(02)
Sensor
21 - Not Used
22 - Integrator Voltage (Output to Diagnostic
Connector)
23 - Not Used
24 - Not Used - Terminates at J2 connector
25 - Vehicle Ground (Power Reference)
C4-4
CONTROL RELAY CONNECTOR
8 - Injection System Source Voltage
6 • Ignition (Ignition Control Module) + 12V
5 - Electric Fuel Pump
4 - Tach Voltage (Trigger)
3 - Vehicle Ground
2 - Battery Voltage
1 - Ignition Switch (Start) + 12V
CONTROL RELAY PIN REFERENCE
PIN
87 - Injection System Source Voltage
1 - Tach Voltage (Trigger)
87b - Electric Fuel Pump
50 - Energized in Ignition Start Position + 12V
30 - Relay Source Voltate (12V DC)
15 - Ignition ("Hot" in ON/Running Position)
+12V
31 - Ground