Mazda CX-9 2007 Service Highlights page 440

SECURITY AND LOCKS [ADVANCED KEYLESS SYSTEM]
ON-BOARD DIAGNOSYS SYSTEM OUTLINE (KEYLESS ENTRY SYSTEM) [ADVANCED KEYLESS SYSTEM]
Special Features
• The keyless entry system has an on-board diagnostic function to facilitate system diagnosis.
• The on-board diagnostic function consists of the following functions: a malfunction detection function, which
detects overall malfunctions in the keyless entry system-related parts; a memory function, which stores
detected DTCs; a display function, which indicates system malfunctions by DTC display; and a PID/data
monitoring function, which reads out specific input/output signals.
• Using the Mazda Modular Diagnostic System (M-MDS), DTCs can be read out and cleared, and the PID/data
monitoring function can be activated.
End Of Sie
ON-BOARD DIAGNOSYS SYSTEM PID DATA/MONITOR FUNCTION OPERATION (KEYLESS ENTRY
SYSTEM) [ADVANCED KEYLESS SYSTEM]
On-board Diagnostic Function
Malfunction detection function
• Detects overall malfunctions in the keyless entry system-related parts.
Display function
• If any malfunction is detected, the keyless warning light (red) in the instrument cluster illuminates to inform the
driver of a system malfunction.
Memory function
• Stores malfunctions in the keyless entry system-related parts detected by the malfunction detection function,
and the stored malfunction contents are not cleared even if the ignition switch is turned to the LOCK position or
the negative battery cable is disconnected.
DTC table
DTC
Mazda Modular
Diagnostic System (M-
MDS) display
B1342 Keyless control module internal malfunction
B1134 Unprogrammed card key
B2477 Configuration error
B1317 Keyless control module power supply voltage increases.
B1318 Keyless control module power supply voltage decreases
B2170 Push switch (Steering lock unit)
B1126 Steering lock unit internal malfunction
U0236 Steering lock unit communication system
B1093 Steering lock unit communication error
U0214 Keyless receiver
B1133 Keyless antenna (exterior, RF)
B1132 Keyless antenna (exterior, LF)
B1128 Keyless antenna (Interior, rear)
B1131 Keyless antenna (exterior, rear)
B1129 Keyless antenna (Interior, middle)
B112A Keyless antenna (Interior, front)
U0323 Communication error to instrument cluster
U0100 Communication error to PCM
U0073 Control module communication error
U2023 Error signal from CAN related module
*
No detected communication with the coil antenna.
B1681
*
Coil malfunction
B2103
*
Only one key ID number is programmed.
B1213
* : Vehicles with immobilizer system
09-14A–22
System malfunction location
id0914b1103000
id0914b1103100