For 1990-2009 cars

Table 1: | Typical Symptoms and Causes
Table 2: | Typical Voltage Measurements

Important: Review the system operation in order to familiarize yourself with the system functions. Refer to the following:

• | Outside Mirrors Circuit Description

• | Power Windows Circuit Description

• | Power Windows Description

• | Keyless Entry System Description

• | Keyless Entry System Operation

• | Keyless Entry System Circuit Description

### Visual/Physical Inspection

• | Inspect for aftermarket devices which could affect the operation of the power mirrors and the power windows systems. Refer to Checking Aftermarket Accessories in Wiring Systems.

• | Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

• | Inspect all related ground points for being clean and tight.

The following are some typical symptoms with probable causes.

#### Typical Symptoms and Causes

Symptom | Possible Cause
--- | ---
LOCK function inoperative from the door switch and the transmitter |

• | Open in coil feed or coil ground of door LOCK relay

• | Faulty relay

UNLOCK function operative on the driver's door only from the door switch and the transmitter |

• | Open in coil feed or coil ground of door UNLOCK relay

• | Faulty relay

LOCK function inoperative from the transmitter | Open in PNK wire between the remote control door lock receiver and S226
UNLOCK function operative on the driver's door only from the transmitter | Open in RED/WHT wire between the remote control door lock receiver and S222
UNLOCK function inoperative on the driver's door lock from the door switch and operative on the driver's door lock from the transmitter | Open in PNK/GRN wire between the remote control door lock receiver and S228
LOCK function inoperative on the driver's door only from the door switch and the UNLOCK function inoperative from the transmitter | Open in BLK wire between the remote control door lock receiver and G201
UNLOCK function inoperative on the driver's door only from the door switch and all functions inoperative from the transmitter | Open in RED/WHT wire between S221 and S222

The following table provides some typical voltage measurements.

#### Typical Voltage Measurements

Terminal/wire | Circuit | Normal Value | Condition
--- | --- | --- | ---
H | Not Used | -- | --
G | Not Used | -- | --
F | Not Used | -- | --
E-RED/WHT | Battery positive voltage | 10-14 Volts | --
D | Not Used | -- | --
C | Not Used | -- | --
B-PNK/GRN | Unlock signal | 10-14 Volts | UNLOCK
A-BLU/RED | Unlock control | 10-14 Volts (momentary) | UNLOCK
J-BLK/WHT | Ignition positive voltage | 10-14 Volts | Ignition ON
K | Not Used | -- | --
L-PNK/WHT | Data link connector | 10-14 Volts | --
M | Not Used | -- | --
N-BLK | Ground | 0-1 Volt | --
P-RED/WHT | Battery positive voltage | 10-14 Volts | --
R-PNK | Lock control | 10-14 Volts | LOCK
S | Not Used | -- | --

### Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

### Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

• | Power Mirrors Inoperative

• | Power Mirrors Inoperative - Left Side

• | Power Mirrors Inoperative - Right Side

• | Power Window Inoperative - Right Side Rear

• | Power Window Inoperative - Left Side Rear

• | Power Window Inoperative - Right Side Front

• | Power Window Inoperative - Left Side Front

• | Power Windows Inoperative - All

• | Power Window Express Down Function Inoperative

• | Power Window Lockout Function Inoperative

• | Power Windows Inoperative

• | Power Door Locks Key Lock Switch Inoperative - One

• | Power Door Locks Key Lock Switch Inoperative - One

• | Power Door Locks Key Lock Switch Inoperative - One

• | Power Door Locks Actuator Motor Inoperative

• | Power Door Locks Actuator Motor Inoperative

• | Power Door Locks Actuator Motor Inoperative

• | Power Door Locks Actuator Motor Inoperative

• | Power Door Locks Actuator Motor Inoperative

• | Power Door Lock Switch Inoperative - Left Side or Right Side

• | Symptoms - Keyless Entry