Checking the wires
Check wire between oil pressure guard 1 and engine control unit 26A for a short circuit to voltage supply as described in Short-circuit to supply voltage. Permanent faults , a short circuit to ground as described in Short-circuit to ground, permanent faults and an open circuit as described in Open-circuit, permanent faults .
HINT: The voltage should be 0 V in 1 with closed oil pressure contact (lamp on) and 12 V with an open circuit (lamp off).
Do the necessary corrective action.
Additional information:
- To connect the test box, see Connecting the Driver Information Module (DIM) test box .