| Test | Tester | Check | Notes | Nominal | |
|---|---|---|---|---|---|
| Step | Multimeter MKM-587-A | of | between | Value | |
| 06 | Pressure switch ASSY. S20 | ||||
| Voltmeter range 20 V, DC | Voltage supply, low pressure safety switch S20.1 and high pressure safety switch S20.2 | ||||
| Wiring harness plug S20 (1) | Ground | · Ignition ON |
· Disconnect wiring harness plug from switch S20
| · Switch S101 ON | » 11.5 V | ||
|---|---|---|---|
| Ohmmeter range 200 W | Passage when at rest: low pressure safety switch S20.1 and high pressure safety switch S20.2 | ||
| Switch S20/Ter. 1 | Switch S20/Ter. 2 | · Ignition OFF | |
| · Disconnect wiring harness plug from switch S20 | » 0 W | ||
| Possible cause of fault, trouble-shooting |
1. Lead interruption between pressure switch ASSY. S20 (1) and X6 (57/pin).
2. Lead interruption between X6 (57/bushing) and AC switch S101/Ter. (A).
3. Pressure switch ASSY. S20 defective.
4. AC switch S101 defective. (AC switch S101 is not defective if the telltale in the switch illuminates after actuation of the switch).
5. AC relay K6 defective
( ) Terminal in wiring harness plug
| Test | Tester | Check | Notes | Nominal | |
|---|---|---|---|---|---|
| Step | Multimeter MKM-587-A | of | between | Value | |
| 06 | Voltmeter range 20 V, DC | Voltage supply, high pressure switch, radiator fan and auxiliary fan S20.3 | |||
| Wiring harness plug S20 (4) | Ground | · Ignition ON |
· Disconnect wiring harness plug from switch S20
· Disconnect wiring harness plug from switch S128
| » 11.5 V | |||
|---|---|---|---|
| Ohmmeter range 200 W | Wiring harness plug S20 (3) | Ground | · Ignition OFF |
· Disconnect wiring harness plug from switch S20
| » 0 W | |||
|---|---|---|---|
| Passage when at rest: high pressure switch, radiator fan and auxiliary fan S20.3 | |||
| Switch S20/Ter. 4 | Switch S20/Ter. 3 | · Disconnect wiring harness plug from switch S20 | ¥ W |
| Possible cause of fault, trouble-shooting |
1. Lead interruption between pressure switch ASSY. S20 (4) and radiator fan relay K67/Ter. 85 (6).
2. Lead interruption between pressure switch ASSY. S20 (4) and radiator fan relay K52/Ter. 85 (6).
3. Pressure switch ASSY. S20 defective.
4. Lead interruption between pressure switch ASSY. S20 (3) and grounding point 2.
5. Lead interruption between pressure switch ASSY. S20 (1) and X6 (57/pin).
6. Lead interruption between switch X6 (57/bushing) and compressor switch S101 (A).
7. Lead interruption between pressure switch ASSY. S20 (2) and X6 (54/pin) or power steering pressure switch S61.
8. Lead interruption between switch X6 (54/bushing) and radiator fan relay and AC fan motor, 1st speed, K26/Ter. 86 (3).
( ) Terminal in wiring harness plug