Suzuki XL7 2007 Service Manual page 176

1A-71 Engine General Information and Diagnosis:
Conditions for Setting the DTC
P0111
The ECM detects that the IAT remains steady within 2°C
(4°F) during the idle test. The condition exists for a total
of 16 seconds. Or, the ECM detects that the IAT
decreased less than 2°C (4°F) during the cruise test.
The condition exists for a total of 28 seconds.
P0112
The ECM detects that the intake air temperature is more
than 132°C (270°F) for more than 4 seconds or
cumulative of 50 seconds.
P0113
The ECM detects that the intake air temperature is less
than −42°C (−43.6°F) and remains steady within 3°C
(5°F) during an air flow increase of more than 999
grams. The scan tool is limited to −40°C (−40°F), so the
diagnostic procedure uses −39°C (−38°F) to determine if
there is an IAT condition. The condition exists for more
than 4 seconds or cumulative of 50 seconds.
Action Taken When the DTC Sets
DTCs P0111, P0112, and P0113 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0111, P0112, and P0113 are Type B DTCs.
Diagnostic Aids
• If the vehicle has sat overnight, the IAT sensor and
the ECT sensor values should display within 3°C
(5°F).
• High resistance on either the IAT sensor signal circuit
or the IAT sensor low reference circuit could set a
DTC.
• Use the J 35616 Connector Test Adapter Kit for any
test that requires probing the underhood fuse block
terminals, component wire harness terminals, or the
ECM wire harness connector terminals.
Reference Information
Schematic Reference
"Engine Controls Schematics"
Connector End View Reference
• "Engine Control Module Connector End Views"
• "Engine Controls Connector End Views"
Electrical Information Reference
• "Circuit Testing: "
• "Connector Repairs: "
• "Testing for Intermittent Conditions and Poor
Connections: "
• "Wiring Repairs: "
DTC Type Reference
"Powertrain Diagnostic Trouble Code (DTC) Type
Definitions"
Scan Tool Reference
• "Scan Tool Data List - Engine Controls - 3.6L (LY7)"
• "Scan Tool Data Definitions - Engine Controls - 3.6L
(LY7)"
• "Scan Tool Output Controls - Engine Controls - 3.6L
(LY7)"
Special Tools Required
J 35616 Connector Test Adapter Kit
Circuit/System Verification
Operate the vehicle within the conditions for running the
DTC. You may also operate the vehicle within the
conditions that you observed from the Freeze Frame/
Failure Records. DTC P0111, P0112, or P0113 should
not set.
Circuit/System Testing
1. Ignition OFF, disconnect the MAF/IAT sensor.
2. Ignition ON, verify that the IAT sensor parameter is
at −40°C (−40°F).
➢ If greater than −40°C (−40°F), test the signal circuit
for a short to ground. If the circuit/connections test
normal, replace the engine control module (ECM).
3. Ignition OFF, remove the fuse that supplies B+ to
circuit terminal C2-56 of the ECM.
CAUTION
!
Do NOT use a test lamp to test the continuity
of the circuit. Damage to the control module
may occur due to excessive current draw.