Suzuki XL7 2007 Service Manual page 278

1A-173 Engine General Information and Diagnosis:
Action Taken When the DTC Sets
DTCs P2300, P2301, P2303, P2304, P2306, P2307,
P2309, P2310, P2312, P2313, P2315, and P2316 are
Type B DTCs.
Conditions for Clearing the DTC
DTCs P2300, P2301, P2303, P2304, P2306, P2307,
P2309, P2310, P2312, P2313, P2315, and P2316 are
Type B DTCs.
Diagnostic Aids
• Inspect the ignition coils for aftermarket devices. An
aftermarket device connected to the ignition coil
circuits, may cause this DTC to set.
• If the condition is intermittent, moving the related
harnesses and connectors, with the engine operating,
while monitoring the appropriate Misfire Current
Cylinder parameter may help to isolate the condition.
Reference Information
Schematic Reference
"Engine Controls Schematics"
Connector End View Reference
• "Engine Control Module Connector End Views"
• "Engine Controls Connector End Views"
Description and Operation
"Electronic Ignition (EI) System Description: "
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. Operate the engine for 30 seconds. Observe the
DTC information with a scan tool. DTCs P2300,
P2301, P2303, P2304, P2306, P2307, P2309,
P2310, P2312, P2313, P2315, and P2316 should
not set.
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 List.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at
the appropriate ignition coil.
NOTE
The ignition circuit supplies voltage to other
components. Make sure you test all circuits
for a short to ground or test all components
for being shorted that share the ignition
circuit.
2. Ignition ON, verify that a test lamp illuminates
between the ignition voltage circuit terminal D and
ground.
➢ If the test lamp does not illuminate, test the ignition
voltage circuit for a short to ground or an open/high
resistance. If the circuit tests normal and the
ignition circuit fuse is open, test all the components
connected to the ignition voltage circuit and replace
as necessary.
3. Crank or start the engine. Test for 200-400 mV
between the appropriate IC circuit terminal C and
ground.
➢ If less than the specified value, test the IC circuit for
a short to ground or an open/high resistance. If the
circuit/connection tests normal, replace the ECM.
➢ If greater than the specified value, test the IC circuit
for a short to voltage. If the circuit/connection tests
normal, replace the ECM.
4. Ignition OFF, test for 5 ohms or less between the low
reference circuit terminal B and the ECM housing.
➢ If greater than the specified value, test for an open/
high resistance in the low reference circuit. If the
circuit/connection tests normal, replace the ECM.
5. Test for 5 ohms or less between the ground circuit
terminal A and ground.
➢ If greater than the specified value, repair the open,
or high resistance in the ground circuit.
6. If all circuits/connections test normal, replace the
ignition coil.
Repair Instructions
Perform the "Diagnostic Repair Verification - Vehicle
Diagnostic Information: " after completing the diagnostic
procedure.
• "Ignition Coil Replacement - Bank 1: "
• "Ignition Coil Replacement - Bank 2: "
• "Control Module References: " for engine control
module replacement, setup, and programming