12
Test Procedures
TROUBLESHOOTING AND ELECTRICAL
SYSTEM: DIESEL VEHICLES
– Wire continuity of wires w122, w121, w37, w48, w24, w125, w126, and w201.
Wire Continuity on page 12-31.
TEST PROCEDURE 29 – Low Oil Warning Light Circuit
See General Warnings, Section 1, Page 1-2.
If the low oil warning light stays on, test the oil pressure switch.
See the Kubota D722 diesel engine manual
(CC P/N 103840201).
If the low oil warning light does not illuminate and the vehicle is low on oil, proceed to step
1.
See following NOTE.
NOTE:
The low oil warning light should illuminate when the key switch is turned to the ON position. After the engine
has been started, the low oil warning light should remain illuminated until the oil pressure switch has been
activated.
1.
Disable the vehicle.
See Disabling the Vehicle on page 1-3.
2.
Raise the hood.
3.
Ensure that the wires are connected correctly and are tight. If they are not, rewire or tighten as necessary.
4.
Disconnect the 18-gauge black/white wire (w17) from the low oil warning light terminal.
5.
Leave the 18-gauge purple wire (w42) connected to the low oil warning light.
6.
Place a jumper wire on the terminal of the low oil warning light where the black/white wire was removed.
7.
Touch the frame (ground) with the remaining end of the jumper wire.
8.
Turn the key switch to the ON position. The low oil warning light should illuminate.
9.
If the low oil warning light does not illuminate when the key switch is in the ON position, check the 18-gauge
purple wire (w42) for continuity between the terminal at the low oil warning light and the 18-gauge purple wire
(w37) at the key switch. Also check the continuity between the terminal on the 18-gauge black/white wire (w17)
and the terminal on the oil pressure switch 16-gauge black/white wire (w200).
10.
If there is continuity between the 18-gauge purple wire (w42) at the low oil warning light and the 18-gauge purple
wire (w37) at the key switch, replace the low oil warning light.
See Warning Light Removal on page 14-5.
11.
If the problem is not corrected by performing the previous steps, test the oil pressure switch.
See the Kubota
D722 diesel engine manual (CC P/N 103840201).
TEST PROCEDURE 30 – 12-Volt Accessory Receptacle
See General Warnings, Section 1, Page 1-2.
NOTE:
Keep the battery connected during this test procedure.
1.
Disable the vehicle.
See Disabling the Vehicle on page 1-3.
2.
Set the multimeter to 20 VDC.
3.
Measure the voltage between the center contact and the outer contact of the accessory receptacle. The voltage
should be approximately 12 VDC.
4.
If the voltage is not approximately 12 VDC, check the 10-amp fuse on orange/white wire (w115) located on the
electrical component mounting plate.
See Test Procedure 2 – Fuse on page 12-13.
5.
If the fuse is good, check the continuity of the wires connected to the accessory receptacle.
Page 12-38
2016 Carryall 1500/1700 and XRT 1550 Maintenance and Service Manual
Summary of Contents for Carryall 1500 2016
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