Description of SID 59 – Dual-Speed Fan Low Stage Operation Fault
SID 59 indicates that a fault occurred during low stage operation of the electronically controlled dual-speed cooling fan. The fan is linked to the engine PLD-MR through the large 55-pin wiring harness connector. See Figure “Location of Wiring Harness Connectors” .
| 1. PLD-MR (Engine Computer) | 3. Small 16-Pin Wiring Harness Connector |
| 2. Large 55-Pin Wiring Harness Connector | |
Figure 1. Location of Wiring Harness Connectors
The fan fault diagnostic condition is typically:
- Open Circuit (059 05).
- Short to Ground (059 06).
