
TROUBLESHOOTING [ENGINE CONTROL KL]
DTC
P0703
Brake switch input malfunction
DESCRIPTION
• Continuous Memory DTC P0703 indicates brake switch input fault
[Possible Cause]
• Open to ground or power
• Damaged PCM
• Damaged brake switch
STEP
INSPECTION
ACTION
1
CHECK OPERATION OF BRAKE LIGHT
• Apply and release brake pedal several
times and observe brake light operation.
• Does brake light operate normally?
Yes
Go to next step.
No
Go to step 3 if brake light is never on.
Go to step 5 if brake light is always on.
2
CHECK FOR PCM BOO PID CYCLING
• Key on, engine off.
• Access BOO PID.
• Apply and release brake pedal several
times while viewing BOO PID.
Note
• If BOO PID is not accessible, check brake
light circuit.
•
Does BOO PID cycle ON/OFF?
Yes
Go to Pinpoint Test for Intermittent key on engine off
(KOEO) input sensor wiggle procedure.
No
Check brake light circuit.
3
CHECK FOR POWER CIRCUIT TO BRAKE
SWITCH
Note
• Using 12 volt test lamp, verify integrity of
related fuses In fuse panel and check
condition of brake light bulbs before
starting this test.
• Key off.
• Disconnect brake switch.
• Measure brake light input voltage between
brake switch and chassis ground.
•
Is voltage greater than 10.5 volts?
Yes
Go to next step.
No
SERVICE open power circuit to brake switch.
RECONNECT switch.
RESET PCM to completely clear DTCs.
i
xr
After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
4
VERIFY INTEGRITY OF BRAKE SWITCH
• Brake switch disconnected.
• Connect digital multimeter test probes to
brake switch terminals at brake switch.
• Apply brake pedal while monitoring
reading.
• Is resistance less than 5.0 ohms?
Yes
SERVICE open circuit between brake switch and
stoplamp ground.
RECONNECT brake switch.
RESET PCM to completely clear DTCs.
c r After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
No
REPLACE brake switch.
RECONNECT brake switch. RESET PCM to completely
clear DTCs.
ct
After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
5
VERIFY BRAKE SWITCHES NOT ALWAYS
CLOSED
• Key off.
• Brake switch disconnected.
• Key on, Engine off.
•
Is brake light still on?
Yes
Go to next step.
No
VERIFY proper installation of brake switch.
If okay, REPLACE brake switch.
RECONNECT brake switch.
RESET PCM
to completely clear
DTCs.
tr
After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
6
CHECK FOR SHORT TO POWER CIRCUIT
IN PCM
• Key off.
• Brake switch disconnected.
• Key on, engine off.
• Is brake light still on?
Yes
Go to next step.
No
REPLACE PCM.
RECONNECT brake switch.
RERUN OBD Test.
0 1-01B-87
Содержание MX-6 1998
Страница 1: ......
Страница 501: ...STARTING SYSTEM 3 If not as specified replace the starter interlock switch 01 19 3...
Страница 803: ...MANUAL TRANSAXLE W 6 U 5 1 5 W A C 05 15 7...
Страница 934: ...CONTROL SYSTEM CONTROL SYSTEM STRUCTURAL VIEW W6U740WA0 07 40 2...
Страница 983: ...SERVICE TOOLS 08 60 SERVICE TOOLS 08 RESTRAINTS S S T 08 60 1 08 RESTRAINTS SST 08 60 1...
Страница 1005: ...TROUBLESHOOTING POWER DOOR LOCK SYSTEM From previous page Go to next page W 6 U 9 0 1 W H 3 09 01E 7...
Страница 1168: ...SEATS 4A 4 If not as specified replace the power seat switch 2A 2B t 4B 3A 1C 1A 1F W6U913WA9 09 13 7...