5033089 JOHNSON ROD, CHOKE

Illustration 1 g01078325
Schematic for the 5 volt supply
Test Step 1. Inspect the Electrical Connectors and Wiring
Illustration 2 g01076892
Terminal box
(1) J1/P1 connectors for the ECM
(2) J12/P12 connectors for the harness from the sensors
(3) 16 amp circuit breaker
(4) J9/P9 connectors for the wiring to the customer's connections
Set the engine control to the OFF/RESET mode. Switch 16 amp circuit breaker (3) to the OFF position. Note: For the following steps, refer to Troubleshooting, "Inspecting Electrical Connectors".
Thoroughly inspect each of the following connectors:
J1/P1 connectors
J9/P9 and J12/P12 connectors on the terminal box
Check the torque of the allen head screw for the ECM connectors. The proper torque is 6 1 N m (55 9 lb in).
Illustration 3 g01053671
Harness side of the P1 connector
(P1-2) 5 volt supply
(P1-3) Return
(P1-11) Signal for the humidity
(P1-14) Signal for the inlet manifold air temperature
(P1-16) Signal for the desired speed
(P1-17) Signal for the engine oil temperature
(P1-18) 5 volt supply
(P1-24) Signal for the filtered engine oil pressure
(P1-26) Signal for the unfiltered engine oil pressure
(P1-35) Return
Illustration 4 g00888444
Harness side of the P12 connector
(P12-A) 5 volt supply
(P12-C) Return
(P12-E) Signal for the unfiltered engine oil pressure
(P12-F) Signal for the filtered engine oil pressure
(P12-G) Signal for the humidity
(P12-H) Signal for the engine oil temperature
(P12-K) Signal for the inlet air temperature
Illustration 5 g01070999
Harness side of the P9 connector
(P9-H) Return
(P9-I) Signal for desired speed
(P9-J) 5 volt supply
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the circuits for the 5 volt sensors.
Illustration 6 g01076893
Right side view
(5) Inlet air temperature sensor
(6) Engine coolant temperature sensor
Illustration 7 g01076895
Left side view
(7) Unfiltered oil pressure sensor
(8) Filtered oil pressure sensor
(9) Oil temperature sensor
Illustration 8 g01076896
Left side views of the 50 Hz and 60 Hz engines
(10) Humidity sensor (if equipped)
Check the harness and wiring for abrasion and for pinch points from each 5 volt sensor to the ECM. Expected Result:All of the connectors, pins, and sockets are connected properly. The connectors and the wiring do not have corrosion, abrasion, or pinch points.Results:
OK - All of the connectors, pins, and sockets are connected properly. The connectors and the wiring do not have corrosion, abrasion, or pinch points. The components are in good condition with proper connections. Proceed to Test Step 2.
Not OK - At least one of the connectors, pins, or sockets are not connected properly. At least one of the connectors and the wiring has corrosion, abrasion, and/or pinch points.Repair: Perform the necessary repairs and/or replace parts, if necessary.STOPTest Step 2. Check for Diagnostic Codes
Connect Cat ET to the service tool connector. Refer to Troubleshooting, "Electronic Service Tools".
Rotate the "DESIRED SPEED" potentiometer (if equipped) counterclockwise to the minimum speed position.
Switch the 16 amp circuit breaker ON. Set the engine control to the STOP mode.
Observe the "Active Diagnostic" screen on Cat ET. Wait at least 30 seconds so that any codes may become activated. Look for these codes:
262-03 5 Volt Sensor DC Power Supply short to +batt
262-04 5 Volt Sensor DC Power Supply short to ground
Observe the "Logged Diagnostic" screen on Cat ET. Look for the same codes. Expected Result:The 262-03 code or the 262-04 code is not active or logged.Results:
No codes - There are no active codes or logged codes. If the engine is equipped with a "DE