TROUBLESHOOTING [ENGINE CONTROL FS]
STEP
INSPECTION
ACTION
5
CHECK MAF CIRCUIT FOR SHORT TO
GROUND IN PCM
• Key off.
• MAF sensor disconnected.
• Breakout box installed.
• Reconnect PCM to breakout box.
• Disconnect NGS tester from DLC.
• Measure resistance between Test Pin 88
and Test Pins 36 and 24 or 103 at breakout
box.
•
Is each resistance greater than 10,000
ohms?
Yes
RECONNECT NGS tester.
Go to next step.
No
MAF sensor signal circuit shorted to ground or PCM
ground in PCM.
REMOVE breakout box.
RECONNECT MAF sensor.
RESET PCM to completely clear DTCs.
c r After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
6
CHECK PCM GROUND CIRCUIT (BETWEEN
PCM AND MAF SENSOR GROUND
CIRCUIT) FOR SHORT TO GROUND
CIRCUIT IN PCM
• Key off.
• MAF sensor disconnected.
• Breakout box installed.
• PCM connected to breakout box.
• NGS disconnected from DLC.
• Measure resistance between Test Pin 36
and Test Pins 51 or 103 at breakout box.
•
Is resistance greater than 10,000 ohms?
Yes
RECONNECT NGS tester.
Go to next step.
No
PCM ground circuit shorted to ground circuit in PCM.
REPLACE PCM.
REMOVE breakout box.
RECONNECT all components.
RERUN OBD Test.
7
CHECK MAF SENSOR CIRCUIT OUTPUT
• Key off.
• MAF sensor connected.
• Breakout box installed.
• PCM connected.
• Key on, engine running.
Note
• If idle is not stabilized at minimum of 700
rpm, go to ENGINE SYMPTOM
TROUBLESHOOTING.
• Measure voltage between Test Pin 88 at
breakout box and battery negative post.
•
Is voltage between
0.34
and 1
.96
volts at
idle?
Yes
MAF SIG to PCM is okay.
Go to next step.
No
MAF sensor signal circuit or MAF sensor ground circuit is
open or MAF SIG is shorted to MAF RTN in MAF sensor.
REPLACE MAF sensor.
REMOVE breakout box.
RECONNECT PCM.
RESET PCM to completely clear DTCs.
c r After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
8
VERIFY MAF SENSOR CIRCUIT INPUT AND
OUTPUT
• Key off.
• MAF sensor connected.
• Breakout box installed.
• PCM connected.
• Key on, engine running.
• Measure voltage between Test Pin 88 and
Test Pin 36 at breakout box.
•
Is voltage between
0.34
and 1
.96
volts?
Yes
PCM ground circuit in MAF sensor is okay.
Go to next step.
No
PCM ground circuit open in MAF sensor.
REPLACE MAF sensor.
REMOVE breakout box.
RECONNECT PCM.
RESET PCM to completely clear DTCs.
c r After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
9
CHECK MAF SENSOR CIRCUIT OUTPUT
WITH NGS TESTER
• Key off.
• MAF sensor connected.
• Key on, engine running.
•
Access MAF
V
PID with NGS tester at idle.
•
Is
MAF
V
PID between
0.34
and 1
.96
volts?
Yes
Unable to identify fault at this time.
Check possible intermittent.
Go to SYMPTOM TROUBLESHOOTING No.27.
No
MAF sensor signal circuit or PCM ground circuit is open or
shorted together in PCM.
REPLACE PCM.
REMOVE breakout box.
RECONNECT PCM.
RESET PCM to completely clear DTCs.
j y After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
0 1 -0 1 A -91
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...