Introduction
Component testing procedures are provided to determine whether a component is good or bad.
Testing information for each component includes a schematic, a view of the terminal locations and step-by-step test procedures. Terminal locations are identified by numbers or letters that may be on the component or next to it.
Scheme 28
The component connector MUST BE REMOVED before testing. To test a single circuit within the component, select that circuit under the column "Circuit to test". If you wish to test the complete component, perform all tests.
Connect the tester to the terminals shown in the second column and operate the component as shown in the third column.
Scheme 29
Scheme 30
Component testing procedure
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Headlamp circuit | 7 and 10 | Off | Open circuit |
| Park | Open circuit | ||
| Low | Closed circuit | ||
| Auto | Open circuit | ||
| Autolamp Circuit | 7 and 4 | Off | Open circuit |
| Park | Open circuit | ||
| Low | Open circuit | ||
| Auto | Closed circuit | ||
| Parking Lamps | 7 and 5 | Off | Open circuit |
| Park | Closed circuit | ||
| Low | Open circuit | ||
| Auto | Open circuit | ||
| Fog lamps | 7 and 6 | Off | Open circuit |
| Fog | Closed circuit |
MAIN LIGHT SWITCH - COMPONENT TESTING
Scheme 31
Scheme 32
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Interior lamps Circuit | 4 and 5 | Interior lamps | Closed circuit |
| Off | Open circuit | ||
| Illumination dimmer resistor | 4 and 6 | Rotate knob clockwise | Ohmmeter will show smoothly increasing resistance |
| Dome defeat Circuit | 4 and 2 | Dome switch On | 50? ± 1% |
| Dome defeat | 100? ± 29% |
ILLUMINATION DIMMER SWITCH (14A464) - COMPONENT TESTING
Scheme 33
Scheme 34
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move key to these positions | A good switch will indicate |
|---|---|---|---|
| Run/Start power circuit | 4 and 1 | Off/Lock | Open circuit |
| Accessory | Open circuit | ||
| Run | Closed circuit | ||
| Start | Closed circuit | ||
| Run/Acc power circuit | 4 and 6 | Off/Lock | Open circuit |
| Accessory | Closed circuit | ||
| Run | Closed circuit | ||
| Start | Open circuit | ||
| Key reminder circuit | 4 and 5 | Key In | Closed circuit |
| Key Out | Open circuit | ||
| Start power circuit | 4 and 7 | Off/Lock | Open circuit |
| Accessory | Open circuit | ||
| Run | Open circuit | ||
| Start | Closed circuit |
IGNITION SWITCH (14489) - COMPONENT TESTING
Scheme 35
Scheme 36
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Washer switch circuit | 13 and 15 | Rear, Washer switch depressed | Closed circuit |
| 14 and 15 | |||
| 13 and 15 | Rear, Washer switch normal | Open circuit | |
| 14 and 15 | |||
| 10 and 15 | Front | Closed circuit | |
| Front | Open circuit | ||
| Rear wiper switch circuit | 13 and 15 | Off | Open circuit |
| On | Closed circuit | ||
| Interval | Closed circuit | ||
| 14 and 15 | Off | Open circuit | |
| On | Closed circuit | ||
| Interval | Open circuit | ||
| Front wiper switch circuit | 16 and 15 | Off | Open circuit |
| Interval 1 | Open circuit | ||
| Interval 2 | Open circuit | ||
| Interval 3 | Open circuit | ||
| Interval 4 | Closed circuit | ||
| Interval 5 | Closed circuit | ||
| Low | Closed circuit | ||
| High | Closed circuit | ||
| 11 and 15 | Off | Open circuit | |
| Interval 1 | Open circuit | ||
| Interval 2 | Closed circuit | ||
| Interval 3 | Closed circuit | ||
| Interval 4 | Closed circuit | ||
| Interval 5 | Open circuit | ||
| Low | Open circuit | ||
| High | Open circuit | ||
| 12 and 15 | Off | Open circuit | |
| Interval 1 | Closed circuit | ||
| Interval 2 | Closed circuit | ||
| Interval 3 | Open circuit | ||
| Interval 4 | Open circuit | ||
| Interval 5 | Open circuit | ||
| Low | Closed circuit | ||
| High | Closed circuit | ||
| 9 and 15 | Off | Open circuit | |
| Low | Open circuit | ||
| High | Closed circuit |
MULTIFUNCTION SWITCH, WIPER/WASHER PORTION - COMPONENT TESTING
Scheme 37
Scheme 38
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Switch lock | 2, C504a and 2, C504b | Unlock | Closed circuit |
| Lock | Open circuit | ||
| Left front window circuit | 2, C504a and 5, C504a | Up | Closed circuit |
| Right front window circuit | 2, C504a and 3, C504a | Down | Closed circuit |
| 2, C504a and 8, C504a | Up | Closed circuit | |
| 7, C504b and 8, C504a 7, C504b and 3, C504a | Rest | Closed circuit | |
| Left rear window circuit | 2, C504a and 1, C504b | Up | Closed circuit |
| 2, C504a and 6, C504b | Down | Closed circuit | |
| 7, C504b and 1, C504b 7, C504b and 6, C504b | Rest | Closed circuit | |
| Right rear window circuit | 2, C504a and 8, C504b | Up | Closed circuit |
| 2, C504a and 4, C504b | Down | Closed circuit | |
| 7, C504b and 8, C504b 7, C504b and 4, C504b | Rest | Closed circuit |
MASTER WINDOW CONTROL SWITCH - COMPONENT TESTING
Scheme 39
Scheme 40
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Window control switch | 3 and 5 | Up | Closed circuit |
| 3 and 2 | Down | Closed circuit | |
| 1 and 2 6 and 5 | Rest | Closed circuit |
WINDOW CONTROL SWITCH, PASSENGER SIDE (14489) - COMPONENT TESTING
Scheme 41
Scheme 42
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Window control switch | 3 and 2 | Down | Closed circuit |
| 3 and 5 | Up | Closed circuit | |
| 1 and 2 6 and 5 | Rest | Closed circuit |
WINDOW CONTROL SWITCH, LEFT REAR (14489) - COMPONENT TESTING
Scheme 43
Scheme 44
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Left mirror | Selector switch Left | ||
| Up | 6 and 3 1 and 5 | Up | Closed circuit |
| Down | 3 and 5 6 and 1 | Down | Closed circuit |
| Left | 6 and 3 5 and 4 | Left | Closed circuit |
| Right | 6 and 1 3 and 8 | Right | Closed circuit |
| Right mirror | Selector switch Right | ||
| Up | 6 and 3 2 and 1 | Up | Closed circuit |
| Down | 3 and 2 6 and 1 | Down | Closed circuit |
| Left | 6 and 3 7 and 1 | Left | Closed circuit |
| Right | 3 and 7 6 and 1 | Right | Closed circuit |
EXTERIOR REAR VIEW MIRROR SWITCH (14A464) - COMPONENT TESTING
Scheme 45
Scheme 46
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Lock/unlock circuit | 2 and 1 | Rest | Open circuit |
| Lock | Open circuit | ||
| Unlock | Closed circuit | ||
| 4 and 1 | Rest | Open circuit | |
| Lock | Closed circuit | ||
| Unlock | Open circuit |
POWER DOOR LOCK SWITCH - COMPONENT TESTING
Scheme 47
Scheme 48
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Seat up/down circuit, rear | 4 and 7 | Up | Closed circuit |
| 5 and 2 | |||
| 4 and 5 | Down | Closed circuit | |
| 7 and 2 | |||
| Seat up/down circuit, front | 4 and 1 | Up | Closed circuit |
| 8 and 2 | |||
| 4 and 8 | Down | Closed circuit | |
| 1 and 2 | |||
| Seat forward/rearward sensor | 4 and 3 | Forward | Closed circuit |
| 6 and 2 | |||
| 4 and 6 | Rearward | Closed circuit | |
| 3 and 2 |
POWER SEAT SWITCH, LEFT - COMPONENT TESTING
Scheme 49
Scheme 50
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Tilt | 3 and 12 | Tilt | Closed circuit |
| Slide | 8 and 12 | Close | Closed circuit |
| 6 and 12 | Open | Closed circuit | |
| 3 and 12 | Auto open | Closed circuit |
ROOF OPENING PANEL CONTROL SWITCH - COMPONENT TESTING
Scheme 51
Scheme 52
Component testing procedure (no voltage applied)
| Circuit to test | Connect ohmmeter to terminals | A good relay will indicate |
|---|---|---|
| Coil | 85 and 86 | 50 - 100ohms |
| Coil Contact | 30 and 87 | Open circuit |
| 86 and 30 | Open circuit | |
| 86 and 87 | Open circuit |
RELAY - MINI ISO - COMPONENT TESTING
Component testing procedure (voltage applied)
Disconnect the ohmmeter; connect pins 30 and 85 to 12V DC power and pin 86 to ground. Measure voltage between pin 87 and pin 86. If the voltage is 12V, the relay is okay. If not, replace the relay.
Scheme 53
Scheme 54
| Circuit to test | Connect ohmmeter to terminals | A good relay will indicate |
|---|---|---|
| Coil | 1 and 2 | 100 - 150ohms |
| Coil Contact | 3 and 5 | Open circuit |
| 1 and 3 | Open circuit | |
| 1 and 5 | Open circuit |
RELAY - ULTRA MICRO ISO - COMPONENT TESTING
Disconnect the ohmmeter; connect pins 2 and 3 to 12V DC power and pin 1 to ground. Measure voltage between pin 5 and pin 1. If the voltage is 12V, the relay is okay. If not, replace the relay.