Specifications
48
Testing Testing Bus Systems
z To check P Bus operation:
1. Check the driver’s seat memory function.
2. Operate a rear window using the driver’s switch block
If both of these functions operate, the P Bus is up and running.
I Bus (Information Bus) and K Bus (Body Bus)
I and K buses are serial communication buses in which all modules send and receive over a single
copper wire. I and K buses are identical, use varies by model.
The K Bus (body bus) allows data to be exchanged between the IKE (Instrument Cluster) and
various control modules.
Figure 4-5 Sample K Bus connections
The driver information system is on the I Bus (information bus):
• Instrument Cluster Module (IKE)
• Check Control (CCM)
• Lamp Control/Check (LM)
• Radio Amplifier (DSP)
• Multifunction steering wheel (MFL)
• Multi-information display (MID)
• Cellular phone
Figure 4-6 Sample I Bus connections
I and K Bus Operational Checks
Use the following procedure to check the operation of an I or K Bus.