Mazda 6 Workshop Manual page 180

Diagnostic procedure
STEP
1 VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has FREEZE FRAME DATA been recorded?
2 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Verify related Service Information availability.
• Is any related repair information available?
3 VERIFY CURRENT SIGNAL STATUS: IS
CONCERN INTERMITTENT OR CONSTANT?
• Connect the WDS or equivalent to the DLC-2.
• Clear the DTC from the PCM memory using
the WDS or equivalent.
• Start the engine.
• Is the PENDING CODE for this DTC present?
4 INSPECT CALIBRATION RESISTOR
CONNECTOR FOR POOR CONNECTION
• Turn the engine switch off.
• Inspect for poor connection calibration resistor
connector for each cylinder (such as damaged/
pulled-out terminals, corrosion).
• Is there any malfunction?
5 INSPECT CALIBRATION RESISTOR SIGNAL
CIRCUIT FOR SHORT TO POWER SUPPLY
• Turn the engine switch to the ON position
(Engine off).
• Disconnect all cylinder's calibration resistor
connectors.
• Inspect the voltage at calibration resister
terminal A for each cylinder (wiring harness-
side) and body GND.
• Is the voltage B+?
6 INSPECT CALIBRATION RESISTOR
• Inspect the calibration resistor.
• Is there any malfunction?
7 INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Turn the engine switch off.
• Inspect for poor connection (such as damaged/
pulled-out terminals, corrosion).
• Is there any malfunction?
8 INSPECT CALIBRATION RESISTOR FOR OPEN
CIRCUIT
• Turn the engine switch off.
• Inspect for continuity between following
terminals (wiring harness-side harness):
— No.1 cylinder calibration resistor terminal A
and PCM terminal 37
— No.2 cylinder calibration resistor terminal A
and PCM terminal 62
— No.3 cylinder calibration resistor terminal A
and PCM terminal 89
— No.4 cylinder calibration resistor terminal A
and PCM terminal 11
— Each cylinder calibration resistor terminal C
and PCM terminal 91
• Is there continuity?
9 VERIFY TROUBLESHOOTING OF DTC P1190
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC using the WDS or equivalent.
• Start the engine.
• Is the PENDING CODE for this DTC present?
F2–168
ON-BOARD DIAGNOSTIC
INSPECTION
Yes Go to the next step.
No Record the FREEZE FRAME DATA on the repair order,
then go to the next step.
Yes Perform repair or diagnosis according to the available
Service Information.
• If the vehicle is not repaired, go to the next step.
No Go to the next step.
Yes Go to the next step.
No Intermittent concern exists.
Perform the "INTERMITTENT CONCERNS
TROUBLESHOOTING".
Yes Repair or replace the suspected terminal, go to Step 9.
No Go to the next step.
Yes Repair or replace the wiring harness for a short to power
supply for the suspected cylinder, then go to Step 9.
No Go to the next step.
Yes Replace the calibration resistor, then go to Step 9.
No Go to the next step.
Yes Repair or replace the suspected terminal, then go to Step
9.
No Go to the next step.
Yes Go to the next step.
No Repair or replace the wiring harness for the suspected
circuit, then go to the next step.
Yes Replace the PCM, then go to the next step.
No Go to the next step.
ACTION