Suzuki XL7 2007 Service Manual page 258

1A-153 Engine General Information and Diagnosis:
Conditions for Running the DTC
• Before the ECM can report DTC P2096 or P2098
failed, DTCs P0030, P0031, P0032, P0041, P0050,
P0051, P0052, P0131, P0132, P0133, P0135, P0137,
P0138, P0140, P0141, P0151, P0152, P0153, P0155,
P0157, P0158, P0160, P0161, P2177, P2178, P2179,
2180, P2187, P2188, P2189, P2190, P2231, P2232,
P2234, P2235, P2270, P2271, P2272, and P2273
must run and pass.
• DTCs P0100, P0101, P0102, P0103, P0420, P0430,
P0442, P0443, P0455, P0458, and P0459 are not set.
• The engine speed is 1200-2920 RPM.
• The engine load is 17-20 percent and steady.
• The closed loop fuel control is active for greater than 3
seconds.
• The front and rear HO2S are in Closed Loop.
• The calculated exhaust gas temperature is greater
than 300°C (572°F).
• DTCs P2097 and P2099 run continuously when the
conditions above have been met for greater than 200
seconds.
Conditions for Setting the DTC
The post catalyst fuel trim correction factor is biased rich
by more than −8 percent of the HO2S signal value for
more than 4 seconds or for a cumulative of 50 seconds.
Action Taken when the DTC Sets
DTCs P2097 and P2099 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P2097 and P2099 are Type B DTCs.
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)"
Circuit/System Verification
1. Observe the HO2S voltage parameter with the
engine running. The reading should fluctuate above
and below the range of 350-550 mV.
2. If the vehicle passes the Circuit/System Verification
test, then operate the vehicle within the conditions
for running the DTC. You may also operate the
vehicle within the conditions that are captured in the
Freeze Frame/Failure Records Data List.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector of
the appropriate HO2S.
2. Ignition ON, verify that the HO2S parameter is
between 350-500 mV.
➢ If greater than the specified value, test the signal
circuit of the HO2S sensor for a short to voltage. If
the circuit/connections test normal, replace the
ECM.
3. Verify that none of the following conditions exist:
– Rich fuel injectors—Refer to "Fuel Injector
Balance Test with Special Tool: " or "Fuel Injector
Balance Test with Tech 2: ".
– Water intrusion in the HO2S harness connector
– High fuel system pressure—Refer to "Fuel System
Diagnosis: ".
– Fuel that is contaminated—Refer to "Alcohol/
Contaminants-in-Fuel Diagnosis (w/o Special
Tool): " "Alcohol/Contaminants-in-Fuel Diagnosis
(w/ Special Tool): ".
– Fuel saturation of the evaporative emissions
(EVAP) canister
– Restricted exhaust
– Contaminated HO2S - Silicon
➢ If you find any of the above conditions, repair as
necessary.
4. If all circuits/connections test normal, replace the
applicable HO2S.
Repair Instructions
Perform the "Diagnostic Repair Verification - Vehicle
Diagnostic Information: " after completing the diagnostic
procedure.
• "Heated Oxygen Sensor Replacement - Bank 1
Sensor 2: "
• "Heated Oxygen Sensor Replacement - Bank 2
Sensor 2: "
• "Control Module References: " for engine control
module replacement, setup, and programming