| Test | Tester | Check | Notes | Nominal | ||
|---|---|---|---|---|---|---|
| Step | Multimeter MKM-587-A | of | between | Value | ||
| 10 | Voltmeter range | Voltage supply, | K51/Ter. 86 (2) | Ground | · Disconnect wiring harness plug from | » 11.5 V |
| 20 V, DC | radiator fan relay K51 | K51/Ter. 30 (4) | Ground | switch S29 *) | ||
| · Bridge contacts in | » 5.0 V | |||||
| K51/Ter. 87 (8) | Ground | wiring harness plug of switch S29 | » 5.0 V | |||
| K51/Ter. 85 (6) | Ground | · Disconnect relay K51 with base from relay frame |
· Ignition ON
| » 0 V |
|---|
| Possible cause of fault, trouble-shooting |
1. Fuse F17/10A defective.
2. Fuse F20/30A defective.
3. Lead interruption between radiator fan relay K51/Ter. 86 (2) and X6 (61/pin) output fuse F17/10A.
4. Lead interruption between X6 (61/bushing) and output fuse F17/10A.
5. Lead interruption between radiator fan relay K51/Ter. 30 (4) and radiator fan motor M11 (BRWS/brown-white).
6. Lead interruption between auxiliary fan motor M11 (SW/black) and wiring harness plug X6 (76/pin).
7. Lead interruption between wiring harness plug X6 (76/bushing) and output fuse F20/30A.
8. Lead interruption between input fuse F20/30A and starter switch S1 (15A).
9. Lead interruption between radiator fan relay K51/Ter. 85 (6) and coolant temperature switch S29 (BRWS/brown-white).
10. Coolant temperature switch S29 defective - see test step 17
Lead interruption between coolant temperature switch S29 (BR/brown) and grounding point 2.
*) For this, remove front panelling
( ) Terminal in wiring harness plug