Tire Pressure Indicator Sensor Learn w/o WC2 or WC8

Tool Required

J 41760 Tire Pressure Sensor Activating Tool.

The Tire Pressure Monitor (TPM) system uses the instrument panel cluster (IPC), dash integration module (DIM), remote control door lock receiver (RCDLR), keyless entry transmitter, 4 radio frequency (RF) transmitting pressure sensors and the serial data circuit to perform the TPM learn mode functions. The learn procedure must be performed after every tire rotation, RCDLR replacement, sensor replacement, or if the vehicles battery has been disconnected. Once the learn mode has been enabled, each of the sensor's unique identification (Id) codes can be learned into the RCDLRs memory. After the RCDLR has received a sensor transmission, a serial data message is sent from the RCDLR to the DIM to sound a horn chirp, this verifies the sensor has transmitted its Id and the RCDLR has received and learned it. The RCDLR must learn the sensor Ids in the proper order to determine sensor location. The first learned Id is assigned to the left front, second to right front, third to right rear and forth to left rear.

Each sensor has an internal magnetic reed switch. when the J 41760 sensor activating tool is held close a sensor the reed switch closes, activating the sensor. The sensor responds to a magnetic activation by transmitting in learn mode. When the RCDLR receives a learn mode transmission, while in TPM learn mode, it will assign that sensor Id to the location on the vehicle relative to the order in which it was learned.

The RCDLR will cancel the learn mode if more than 1 minute has passed and no sensor Ids have been learned, more than 5 minutes has passed for the entire procedure, all 4 sensor Ids have been learned, vehicle battery voltage is less than 8 volts, or the ignition is turned OFF. If the learn mode is cancelled before any sensor Ids are learned, the RCDLR will remember all previously stored sensor Ids and their locations. As soon as the RCDLR learns the first sensor Id, all previously stored Ids are erased from the RCDLRs memory.

1. Turn ON the ignition, with the engine OFF.

Important: If the sensor learn mode cannot be enabled, ensure the TPM option is enabled in the Remote Function Actuation (RFA) Special Functions.

2. Simultaneously press the keyless entry transmitter's lock and unlock buttons until a horn chirp sounds indicating the mode has been enabled.

Important: If the horn chirp does not sound after 15 seconds, remove then replace the sensor activating tool over the valve stem.

3. Starting with the left front tire, hold the J 41760 sensor activating tool over the left front valve stem until a horn chirp sounds.
4. After the horn chirp sounds, proceed as in step 3 for the next 3 sensors in the following order:

•	Right front

•	Right rear

•

Left rear

5. After the left rear sensor Id is learned, the double horn chirp will sound to indicating all 4 sensor Ids have been learned.
6. Turn OFF the ignition.

Tire Pressure Indicator Sensor Learn w/WC2 or WC8

Important: The following procedures can only be performed on vehicles equipped with enhanced mobility tires (EMT), RPO WC2, or WC8. since the tire pressure sensor is secured to the run flat ring in side the wheel/tire assembly, the sensor cannot be reached using the sensor activating magnet.

Tire Rotation

1. Install a scan tool.
2. Turn the ignition ON, with the engine OFF.
3. With the scan tool select 2004.
4. Select LD Trk, MPV, Incomplete.
5. Select Cadillac Incomplete.
6. Select Limousine.
7. Select Chassis.
8. Select Tire Pressure Monitor.
9. Select Special Functions.
10. Select Tire Rotation/Sensor Replacement.
11. Select the sensor location and press the ENTER key.
12. Select the new location of the sensor by pressing the location soft key the sensor has been rotated to.
13. Repeat steps 12 and 13 for the remaining 3 sensors.
14. Press the EXIT key to escape.

Sensor Replacement

1. Install a scan tool.
2. Turn the ignition ON, with the engine OFF.
3. With the scan tool select 2004.
4. Select LD Trk, MPV, Incomplete.
5. Select Cadillac Incomplete.
6. Select Limousine.
7. Select Chassis.
8. Select Tire Pressure Monitor.
9. Select Special Functions.
10. Select Tire Rotation/Sensor Replacement.
11. Scroll and highlight to select the location for which the sensor is being replaced and press the ENTER key.
12. Using the numeric key pad on the scan tool enter the new 8 digit Id number as noted on the front side of the wheel mounting flange on the replacement wheel/tire assembly and press the ENTER key.
13. Press the YES key if the Id number entered is correct.
14. Press the EXIT key to escape.