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 3)
Scheme 3
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 4
Scheme 5
| 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 lamps | Closed circuit |
HEADLAMP SWITCH, EXTERIOR LAMPS - COMPONENT TESTING
Scheme 6
Scheme 7
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Starter relay circuit | 4 and 7 | Off | Open circuit |
| Acc | Open circuit | ||
| Run | Open circuit | ||
| Start | Closed circuit | ||
| Run/Start power circuit | 4 and 1 | Off | Open circuit |
| Acc | Open circuit | ||
| Run | Closed circuit | ||
| Start | Closed circuit | ||
| Run/Acc power circuit | 4 and 6 | Off | Open circuit |
| Acc | Closed circuit | ||
| Run | Closed circuit | ||
| Start | Open circuit | ||
| Key reminder circuit | 4 and 5 | Key In | Closed circuit |
| Key Out | Open circuit | ||
| Key removal inhibit circuit | 4 and 3 | 65-75 ? |
IGNITION SWITCH - COMPONENT TESTING
Scheme 8
Scheme 9
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Turn signal | 2 and 8 | Left turn | Closed circuit |
| 3 and 8 | Right turn | Closed circuit | |
| Flash-to-pass | 6 and 8 | Pull and hold lever stalk toward steering wheel | Open circuit |
| 4 and 8 | Closed circuit | ||
| High beam | 6 and 8 | Lever stalk in detent toward steering wheel | Closed circuit |
| 4 and 8 | Open circuit |
MULTIFUNCTION SWITCH, LAMP PORTION - COMPONENT TESTING
Scheme 10
Scheme 11
| 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 | 10 and 15 | On | Closed circuit |
| Rest | Open circuit | ||
| Wiper switch circuit | 9 and 15 | Off | Open circuit |
| High | Closed circuit | ||
| Low | Open circuit | ||
| 11 and 15 | Off | Open circuit | |
| High | Open circuit | ||
| Low | Open circuit | ||
| 12 and 15 | Off | Open circuit | |
| High | Closed circuit | ||
| Low | Closed circuit | ||
| 15 and 18 | Off | Open circuit | |
| High | Closed circuit | ||
| Low | Closed circuit | ||
| Intermittent wiper circuit | 15 and 16 | Interval 1 | Open circuit |
| Interval 2 | Open circuit | ||
| Interval 3 | Open circuit | ||
| Interval 4 | Closed circuit | ||
| Interval 5 | Closed circuit | ||
| 11 and 15 | Interval 1 | Open circuit | |
| Interval 2 | Closed circuit | ||
| Interval 3 | Closed circuit | ||
| Interval 4 | Closed circuit | ||
| Interval 5 | Open circuit | ||
| 12 and 15 | Interval 1 | Closed circuit | |
| Interval 2 | Closed circuit | ||
| Interval 3 | Open circuit | ||
| Interval 4 | Open circuit | ||
| Interval 5 | Open circuit |
MULTIFUNCTION SWITCH, WIPER/WASHER PORTION - FRONT - COMPONENT TESTING
Scheme 12
Scheme 13
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Wiper switch circuit | 14 and 15 | Off | Open circuit |
| Interval | Open circuit | ||
| On | Closed circuit | ||
| Rear wash | Closed circuit | ||
| 13 and 15 | Off | Open circuit | |
| Interval | Closed circuit | ||
| On | Closed circuit | ||
| Rear wash | Open circuit |
MULTIFUNCTION SWITCH, WIPER/WASHER PORTION - REAR - COMPONENT TESTING
Scheme 14
Scheme 15
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Switch lock | 5, C504a and 1, C504a | Lock On | Closed circuit |
| Lock Off | Open circuit | ||
| Left front window circuit | 5, C504a and 2, C504b | Up | Closed circuit |
| 5, C504a and 6, C504b | Down | Closed circuit | |
| 5, C504a and 3, C504b | One-Touch Up/Down | Closed circuit | |
| Right front window circuit | 5, C504a and 1, C504b | Up | Closed circuit |
| 5, C504a and 5, C504b | Down | Closed circuit | |
| Left rear window circuit | 5, C504a and 4, C504a | Up | Closed circuit |
| 5, C504a and 2, C504a | Down | Closed circuit | |
| Right rear window circuit | 5, C504a and 6, C504a | Up | Closed circuit |
| 5, C504a and 3, C504a | Down | Closed circuit |
MASTER WINDOW ADJUST SWITCH - COMPONENT TESTING
Scheme 16
Scheme 17
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Window adjust switches | 5 and 4, 6 and 3 | Up | Closed circuit |
| 5 and 3, 1 and 4 | Down | Closed circuit | |
| 6 and 3 | Rest | Closed circuit | |
| 1 and 4 |
WINDOW ADJUST SWITCHES - COMPONENT TESTING
Scheme 18
Scheme 19
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Horizontal circuit | 4 and 3 6 and 2 | Forward | Closed circuit |
| Closed circuit | |||
| 4 and 6 3 and 2 | Rearward | Closed circuit | |
| Closed circuit | |||
| Front Height circuit | 4 and 1 8 and 2 | Up | Closed circuit |
| Closed circuit | |||
| 4 and 8 1 and 2 | Down | Closed circuit | |
| Closed circuit | |||
| Rear Height circuit | 4 and 5 7 and 2 | Up | Closed circuit |
| Closed circuit | |||
| 4 and 7 5 and 2 | Down | Closed circuit | |
| Closed circuit |
SEAT CONTROL SWITCH, 6 - WAY DRIVER OR 2 - WAY PASSENGER POWER SEAT - COMPONENT TESTING
Scheme 20
Scheme 21
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Horizontal circuit | 5 and 4 9 and 3 | Forward | Closed circuit |
| Closed circuit | |||
| 5 and 9 4 and 3 | Rearward | Closed circuit | |
| Closed circuit | |||
| Front Height circuit | 5 and 2 6 and 3 | Up | Closed circuit |
| Closed circuit | |||
| 5 and 6 2 and 3 | Down | Closed circuit | |
| Closed circuit | |||
| Rear Height circuit | 5 and 1 12 and 3 | Up | Closed circuit |
| Closed circuit | |||
| 5 and 12 1 and 3 | Down | Closed circuit | |
| Closed circuit | |||
| Recline circuit | 5 and 11 8 and 3 | Up | Closed circuit |
| Closed circuit | |||
| 5 and 8 11 and 3 | Down | Closed circuit | |
| Closed circuit | |||
| Lumbar circuit | 5 and 7 10 and 3 | Out | Closed circuit |
| Closed circuit | |||
| 5 and 10 7 and 3 | In | Closed circuit | |
| Closed circuit |
SEAT CONTROL SWITCH, 8 - WAY DRIVER OR 4 - WAY PASSENGER POWER SEAT - COMPONENT TESTING
Scheme 22
Scheme 23
| 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 | 1 and 3 | Rest | Open circuit |
| Lock | Open circuit | ||
| Unlock | Closed circuit | ||
| 2 and 3 | Rest | Open circuit | |
| Lock | Closed circuit | ||
| Unlock | Open circuit |
POWER DOOR LOCK SWITCH - COMPONENT TESTING
Scheme 24
Scheme 25
| 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 | 1 and 6 3 and 5 | Up | Closed circuit |
| Down | 1 and 5 3 and 6 | Down | Closed circuit |
| Left | 1 and 8 3 and 6 | Left | Closed circuit |
| Right | 1 and 6 3 and 8 | Right | Closed circuit |
| Right mirror | Selector switch right | ||
| Up | 1 and 6 3 and 2 | Up | Closed circuit |
| Down | 1 and 2 3 and 6 | Down | Closed circuit |
| Left | 1 and 7 3 and 6 | Left | Closed circuit |
| Right | 1 and 6 3 and 7 | Right | Closed circuit |
EXTERIOR REAR VIEW MIRROR SWITCH - COMPONENT TESTING
Scheme 26
Scheme 27
| 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 | On | Closed circuit |
| Off | Open circuit | ||
| Illumination dimmer resistor | 4 and 6 | Rotate knob clockwise | Ohmmeter will show smoothly increasing resistance |
ILLUMINATION DIMMER SWITCH - COMPONENT TESTING
Scheme 28
Scheme 29
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Tilt | 4 and 2 | Tilt | Closed circuit |
| Slide | 4 and 3 | Close | Closed circuit |
| 4 and 7 | Open | Closed circuit | |
| 4 and 2 | Auto open | Closed circuit |
ROOF OPENING PANEL SWITCH - COMPONENT TESTING
Scheme 30
Scheme 31
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Forward | 2 and 7 | Forward | Closed circuit |
| 3 and 1 | |||
| Rearward | 2 and 1 | Rearward | Closed circuit |
| 7 and 6 |
ADJUSTABLE PEDAL SWITCH - COMPONENT TESTING
Scheme 32
Scheme 33
| Circuit to test | Connect ohmmeter to terminals | A good relay will indicate |
|---|---|---|
| Coil | 85 and 86 | 46 - 90 |
| Contact | 30 and 87a | Closed circuit |
| 30 and 87 | Open circuit | |
| Coil-Contact | 85 and 30 | Open circuit |
| 86 and 87a | Open circuit | |
| 86 and 87 | Open circuit |
RELAY - MINI ISO (NO VOLTAGE APPLIED) - COMPONENT TESTING
Disconnect the ohmmeter and connect pins 30 and 85 to 12V DC power and pin 86 to ground. Measure voltage between pins 87 and 86. If the voltage is 12V, continue with the test. If not, replace the relay. Disconnect power from pin 85 and measure voltage between pins 87a and 86. If the voltage is 12V, the relay is okay. If not, replace the relay.
Scheme 34
Scheme 35
| Circuit to test | Connect ohmmeter to terminals | A good relay will indicate |
|---|---|---|
| Coil | 1 and 2 | 46 - 79 |
| Contact | 3 and 5 | Open circuit |
| Coil - Contact | 2 and 3 | Open circuit |
| 2 and 5 | Open circuit |
RELAY - ULTRA MICRO ISO (NO VOLTAGE APPLIED) - COMPONENT TESTING
Disconnect the ohmmeter and connect pins 3 and 1 to 12V DC power and pin 2 to ground. Measure voltage between pins 5 and 2. If the voltage is 12V, the relay is okay. If not, replace the relay.