For 1990-2009 cars

Refer to

#### Power, Ground, MIL, DLC

Underhood Accessory Wiring Junction Block, Relay Center, PWR WDO and PWR OTR Vent Fuses
IGN, SIR, T/S/G, Cruise, and PCM/Pass Key 1 Cluster Fuses
Cell 14: G100, G111 and G113
IGN, SIR, T/S/G, Cruise, and PCM/Pass Key 1 Cluster Fuses
IGN, SIR, T/S/G, Cruise, and PCM/Pass Key 1 Cluster Fuses
IGN, SIR, T/S/G, Cruise, and PCM/Pass Key 1 Cluster Fuses
Hardwire Indicators
Ignition Switch IGN Main Relay, IGN Main 1, PCM/ABS, CONVENT SOL, DRL, and PCM/Crank Fuses
Handling ESD Sensitive Parts Notice
Ignition Switch IGN Main Relay, IGN Main 1, PCM/ABS, CONVENT SOL, DRL, and PCM/Crank Fuses
Handling ESD Sensitive Parts Notice
DLC Schematic
Engine Controls Components
Powertrain Control Module Description
Ignition System, Knock Sensor
OBD II Symbol Description Notice
Powertrain Control Module Connector End Views
,

#### DLC Schematic

Data Link Communications Components
Data Link Communications Circuit Description
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
SIR Handling Caution
Cluster BATT, RR PWR SCKT, PWR Lock, Rap Relay, CTSY Lamp, FRT PWR SCKT, Cigar/DLC and PWR Mirror Fuses
Cluster BATT, RR PWR SCKT, PWR Lock, Rap Relay, CTSY Lamp, FRT PWR SCKT, Cigar/DLC and PWR Mirror Fuses
Cell 14: G200
Cell 14: G200
in Data Link Communications, and

#### Pass Key III Module

Theft Deterrent System Components
Vehicle Theft Deterrent (VTD) Description
Cell 133: G200, G302
DLC Schematic
Stop Lamp, Hazard, and Pass Key Fuses, FRT HVAC MI BLWR and Headlamp Circuit Breakers
IGN, SIR, T/S/G, Cruise, and PCM/Pass Key 1 Cluster Fuses
IGN, SIR, T/S/G, Cruise, and PCM/Pass Key 1 Cluster Fuses
Cell 14: G200
in Theft Deterrent.

### Circuit Description

The vehicle theft deterrent (VTD) module produces the theft deterrent fuel enable signal when ignition is ON and the proper key resistor pellet is detected. The powertrain control module (PCM) monitors the fuel enable signal during crank. If the proper signal is present on the Class II Serial Data Circuit, the PCM enables the fuel delivery in order to allow the engine to start. If the powertrain control module (PCM) is replaced, the replacement PCM should learn the password within a few seconds after the ignition is turned ON. DTC P1630 is an information code indicating that the PCM is ready to learn the theft deterrent password. The engine starts and continues to run with DTC P1630 set. Refer to Vehicle Theft Deterrent (VTD) Description and Vehicle Theft Deterrent (VTD) Operation .

### Conditions for Running the DTC

• | The theft deterrent system has allowed fuel delivery.

• | The PCM is in the theft deterrent password learn mode.

### Conditions for Setting the DTC

The PCM remains in theft deterrent password learn mode for more than 2 seconds.

### Action Taken When the DTC Sets

• | The PCM will not illuminate the malfunction indicator lamp (MIL).

• | The PCM will store conditions which were present when the DTC set as Failure Records data only. This information will not be stored as Freeze Frame data.

### Conditions for Clearing the MIL/DTC

• | A History DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.

• | The DTC can be cleared by using the scan tool Clear Info function.

### Diagnostic Aids

A replacement PCM is in a functional state to learn the password from the VTD System. If the Theft Deterrent Module is replaced, the PCM must be placed in password learning mode to relearn the new password. Once learned, the password becomes permanent information that remains with the vehicle. The loss of PCM battery or ignition voltage does not affect the programmed password information.

Refer to Powertrain Control Module Replacement/Programming .

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you preform the Powertrain On-Board Diagnostic (OBD) System Check? | -- | Go to Diagnostic System Check - Theft Deterrent | Go to Powertrain On Board Diagnostic (OBD) System Check