Mazda CX-9 Grand Touring 2009 Manual page 1191

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Verify related Service Bulletins and/or
on-line repair information availability.
2
Is any related Service Bulletins
available?
INSPECT POOR CONNECTION OF CHT
SENSOR CONNECTOR
Turn the ignition switch off.
3
Disconnect CHT sensor connector.
Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
Are there any malfunction?
INSPECT CHT SENSOR SIGNAL
CIRCUIT FOR SHORT TO POWER
SUPPLY
Turn the ignition switch to the ON
4
position (Engine off).
Measure the voltage between CHT
sensor terminal B (wiring harness-side)
and body ground.
Is the voltage B+?
INSPECT PCM CONNECTOR FOR
POOR CONNECTION
Disconnect the PCM connector.
5
Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
Are there any malfunction?
INSPECT CHT SENSOR CIRCUIT FOR
OPEN CIRCUIT
Inspect the continuity between the
following circuit:
CHT sensor terminal A (wiring
6
harness-side) and PCM terminal
2AL (wiring harness-side).
CHT sensor terminal B (wiring
harness-side) and PCM terminal
2AN (wiring harness-side).
Are there continuity?
INSPECT CHT SENSOR
2008 Mazda CX-9 Grand Touring
Yes
No
Repair or replace suspected part, then go to
Yes
Step 8.
No
Repair or replace suspected part, then go to
Yes
Step 8.
No
Repair or replace suspected part, then go to
Yes
Step 8.
No
Yes Go to the next step.
Repair or replace suspected part, then go to
No
If the vehicle is not repaired, go to the
next step.
Go to the next step.
Go to the next step.
Go to the next step.
Go to the next step.
Step 8.