Ignition Key With Correct Resistor Pellet Code is Used To Start Engine
The theft deterrent module performs the following actions when the correct
ignition key is used in order to start the vehicle:
| • | Enables the theft deterrent relay. The theft deterrent relay enables
the starter unit. |
| • | Sends a password to the Powertrain Control Module (PCM) through
the fuel enable signal circuit. As a result, the PCM allows fuel delivery
to the engine. |
Ignition Key With Wrong Resistor Pellet Code is Used To Start Engine
The theft deterrent module performs one of the two following actions
when you attempt to start the vehicle with a wrong ignition key:
| • | There are 15 PASS-Key® II resistance ranges. The PASS-Key® II
resistance may be one of the 14 valid but incorrect PASS-Key® II resistance
ranges. The theft deterrent module will perform the following actions when
you attempt to start the vehicle (if the condition is present during an
engine start attempt or for 1 second any time after the engine has started): |
| • | Turns on the SECURITY indicator |
| • | Sends a password to the PCM through the fuel enable signal circuit |
| • | The password disables fuel delivery to the engine. |
| • | Disables the theft deterrent relay, which disables the starter
circuit |
| • | Disables sampling of the PASS-Key® II resistance for
3 minutes |
| • | The 3 minute time period is called the shut-down period. |
| • | Disconnecting the battery will not clear the timer sequence. The timer
sequence will resume when battery power is restored. |
| • | Inserting the proper key during the vehicle shut-down period will not
start the engine. The engine will not start until the shut-down period has
elapsed. |
| • | After the shut-down period, the engine will start if the correct ignition
key resistor pellet is used. |
| • | The PASS-Key® II resistance may be correct and allow
the engine to start. Later during the same ignition cycle, the PASS-Key® II
resistance may be one of the 14 valid but incorrect resistance ranges.
The theft deterrent module will perform the following actions: |
| • | Enters the fail-enable mode |
| • | Turns ON the SECURITY indicator |
| • | Sends a password to the PCM through the fuel enable signal circuit
when more attempts to start the engine occur |
| • | The password allows the fuel enable circuit to deliver fuel to the engine. |
| • | Enables the theft deterrent relay, which also enables the starter
circuit. |
Key Detection Circuit Malfunctions
Key detection circuit malfunctions include the following conditions:
The theft deterrent module turns ON the SECURITY indicator when a key
detection circuit malfunction occurs.
If the malfunction is present when you attempt to start the engine,
the theft deterrent module performs the following actions:
| • | Sends a password to the PCM through the fuel enable signal circuit |
| | This password disables fuel delivery to the engine. |
| • | Disables the theft deterrent relay |
The vehicle will exhibit a no-crank engine condition.
If the malfunction is present after the engine is started, the theft
deterrent module enters a fail-enable mode. The theft deterrent module performs
the following actions when you attempt to start the engine again:
| • | Sends a password to the PCM through the fuel enable circuit |
| | This password enables fuel delivery to the engine. |
| • | Enables the theft deterrent relay |
The engine will start.
Unprogrammed Theft Deterrent Module
If you replace a theft deterrent mode, program it to accept the resistance
value of the existing vehicle keys in order to allow correct operation of
PASS-Key® II.
A new service replacement theft deterrent module is programmed to store
the first resistor pellet code it detects.
When the theft deterrent module is unable to detect a valid PASS-Key® II
resistor pellet code, the programming sequence never ends. During the programming
sequence, the theft deterrent module performs the following actions:
| • | Flashes the SECURITY indicator. |
| • | Enables the theft deterrent relay, which enables the starter circuit. |
| • | Sends a password to the PCM through the fuel enable signal circuit |
| | The password enables fuel delivery to the engine. |
| • | The programming sequence ends when the theft deterrent module
is able to detect a valid PASS-Key® II resistor pellet code. |
The engine starts. The programming sequence ends when the theft deterrent
module is able to detect a valid PASS-Key® II resistor pellet code.
