Courtesy of MAZDA MOTORS CORP.
GND SYSTEM INSPECTION FOR VARIABLE RESISTANCE TYPE 2
z
Confirm that terminal sensor #4 is at
0 V
.
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If it is at
0 V
, inspect the sensor.
z
If necessary, replace the sensor.
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If not at
0 V
, inspect for the following:
z
Open circuit in wiring harness
z
Female terminal opening is loose.
z
Coupler (pin holder) damage
z
Pin discoloration (blackness)
z
Harness/pin crimp is loose or disconnected.
INPUT SIGNAL SYSTEM INSPECTION FOR VARIABLE RESISTANCE TYPE 2
1. When an irregular signal is detected, measure the #1 PCM terminal voltage.
z
If the #1 terminal voltage and the M-MDS monitor voltage are the same, proceed to the next step.
z
If there is a difference of 0.5 V or more, inspect for the following points concerning the PCM
connector:
Female terminal opening is loose.
Coupler (pin holder) damage
Pin discoloration (blackness)
Harness/pin crimp is loose or disconnected.
2. Measure the #2 sensor terminal voltage.
z
If there is a
0.5 V
or more difference between the sensor and the M-MDS voltages, inspect the
wiring harness for open or short circuits.
z
If the sensor and the M-MDS voltages are the same, inspect the following points concerning the
sensor connector:
Female terminal opening is loose.
Coupler (pin holder) damage
Pin discoloration (blackness)
Harness/pin crimp is loose or disconnected.
z
If there are no problems, proceed to next investigation below.
ELECTRICAL SUPPLY SYSTEM INSPECTION FOR VARIABLE RESISTANCE TYPE 2
z
Confirm that the sensor #3 terminal is
B+
.
{
If the measured voltage on the #3 terminal is
B+
, inspect the following points on the sensor
connector.
{
If there is no problem, inspect for the following:
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE Symptom Troubleshooting (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:27:38 AM
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