Open circuit
z
If there is no continuity, the circuit is open. Repair or replace the wiring harness.
{
MAF/IAT sensor terminal A and main relay No.1 terminal D
{
MAF/IAT sensor terminal C and PCM terminal 1AJ
{
MAF/IAT sensor terminal D and PCM terminal 1 AN
{
MAF/IAT sensor terminal E and PCM terminal 1AL
Short circuit
z
If there is continuity, the circuit is shorted. Repair or replace the wiring harness.
{
MAF/IAT sensor terminal A and body ground
{
MAF/IAT sensor terminal C and power supply
{
MAF/IAT sensor terminal C and body ground
{
MAF/IAT sensor terminal D and power supply
{
MAF/IAT sensor terminal D and body ground
{
MAF/IAT sensor terminal E and power supply
INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [MZI-3.5]
RESISTANCE INSPECTION
1. Disconnect the MAF/IAT sensor connector.
2. Measure the resistance between MAF/IAT sensor terminals A and F.
z
If not within the specification, replace the MAF/IAT sensor. (See
MASS AIR FLOW
(MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR REMOVAL/INSTALLATION
[MZI-3.5]
.)
z
If the monitor item status/specification (reference) is not within the specification, even though the
resistance is within the specification, perform the "Circuit Open/Short Inspection".
IAT sensor resistance
IAT SENSOR RESISTANCE REFERENCE
NOTE:
z
Before performing the following inspection, make sure to follow the
procedure as indicated in the troubleshooting flowchart. (see HOW TO
USE THIS MANUAL .)
IAT (°C {°F})
Resistance (kilohm)
10 {50}
Approx. 58.75
20 {68}
Approx. 37.30
30 {86}
Approx. 24.27
60 {140}
Approx. 7.70
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE Control System (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:25:31 AM
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© 2005 Mitchell Repair Information Company, LLC.