| Test | Tester | Check | Notes | Nominal | ||
|---|---|---|---|---|---|---|
| Step | Multimeter MKM-587-A | of | between | Value | ||
| 18 | Voltmeter range 20 V, DC | Voltage supply, AC fan motor switch S24 and | Wiring harness plug | |||
| · Disconnect wiring harness plug from AC fan motor M10 | ||||||
| function of | M10 (1) | Ground | · Ignition ON | » 11.5 V | ||
| switch positions | M10 (2) | Ground | · Switch S24 to switch | » 11.5 V | ||
| 1 - 4 | M10 (4) | |||||
| Ground | positions 1-4 | |||||
| » 11.5 V | ||||||
| Relay K7 Ter. 86 (2) | ||||||
| Ground | · Disconnect relay K7 *) | » 11.5 V | ||||
| Possible cause of fault, trouble-shooting |
1. MAXI fuse F15/30A defective.
2. AC relay K6 defective - see test step 07.
3. Lead interruption between AC relay K6/Ter. 87 (8) and AC fan motor switch S24/Ter. G+ (7).
4. AC fan motor switch S24 defective.
5. Lead interruption between output MAXI fuse F15/30A and AC relay K6/Ter. 30 (4)
6. Lead interruption between AC fan motor switch S24/Ter. 1 (6) and wiring harness plug for AC fan motor M10 (1).
7. Lead interruption between AC fan motor switch S24/Ter. 2 (5) and wiring harness plug for AC fan motor M10 (2).
8. Lead interruption between AC fan motor switch S24/Ter. 3 (4) and wiring harness plug for AC fan motor M10 (4).
9. Lead interruption between AC fan motor switch S24/Ter. 4 (3) and AC fan relay, 4th speed, K7/Ter. 86 (2).
*) For this, remove glove compartment and detach relay frame beside glove compartment
( ) Terminal in wiring harness plug