Mazda 2002 6 - Page 1090

T–182
ON-BOARD DIAGNOSTIC [CRUISE CONTROL SYSTEM]
DTC 31
A6E817266350W05
Diagnostic procedure
DTC 31 Brake switch
DETECTION
CONDITION
• Voltage detected at cruise actuator connector terminal C is not approximately 12 V or voltage detected
at cruise actuator connector terminal K is not approximately 0 V.
POSSIBLE
CAUSE
• Burnt STOP 15 A fuse
• Cruise actuator malfunction
• Brake switch and/or brake switch 2 malfunction
• Open circuit in wiring harness between STOP 15 A fuse and brake switch
• Open circuit in wiring harness between brake switch and cruise actuator terminal C
• Short circuit in wiring harness between brake switch 2 and cruise actuator terminal K
STEP INSPECTION ACTION
1 VERIFY WHICH BRAKE SWITCH CIRCUIT IS
MALFUNCTIONING
• Does brake light illuminate when brake pedal
depressed?
Yes Go to Step 6.
No Go to next step.
2 INSPECT STOP 15 A FUSE FOR FUSION
• Is STOP 15 A fuse okay?
Yes Go to next step.
No Replace fuse after inspecting and repairing wiring harness.
* 3 INSPECT WIRING HARNESS BETWEEN
STOP 15 A FUSE AND BRAKE SWITCH FOR
CONTINUITY
• Depress brake pedal.
• Is voltage at brake switch connector terminal
D approximately 12 V?
Yes Go to Step 5.
No Go to next step.
* 4 INSPECT WIRING HARNESS BETWEEN
STOP 15 A FUSE AND BRAKE SWITCH FOR
CONTINUITY
• Is voltage at brake switch connector terminal
B approximately 12 V?
Yes Inspect brake switch.
(See P–8 BRAKE SWITCH INSPECTION)
No Repair wiring harness. (STOP 15 A fuse—Brake switch)
* 5 INSPECT WIRING HARNESS BETWEEN
BRAKE SWITCH AND BRAKE LIGHT FOR
CONTINUITY
• Depress brake pedal.
• Is voltage at brake light connector terminal
(power supply side) approximately 12 V?
Yes Inspect following electrical parts.
• Brake light bulb
• Wiring harness between brake light and ground
No Repair wiring harness. (Brake switch—Brake light)
* 6 INSPECT WIRING HARNESS BETWEEN
BRAKE SWITCH AND CRUISE ACTUATOR
FOR CONTINUITY
• Depress brake pedal.
• Is voltage at cruise actuator connector
terminal C approximately 12 V?
Yes Go to next step.
No Repair wiring harness. (Cruise actuator—Brake switch)