Suzuki XL7 2007 Service Manual page 211

– The ECM uses the camshaft position sensors to
determine engine speed and position when there is
a CKP sensor condition.
– The engine will operate with a CKP sensor
condition only if the ECM has stored the learned
reference position of the camshafts in memory.
With a crankshaft position sensor condition the
engine will go into a limp home mode after a restart.
The ECM then calculates engine speed from one of
the camshaft position sensors.
– An intermittent condition in the camshaft position
(CMP) sensor circuits can cause a CKP DTC to set.
Inspect the CMP sensor, harness connections, and
related wiring, if you suspect this condition.
• Test the current out-put of the signal circuit if you
suspect high resistance in the circuit. The current out-
put should be greater than 1 mA when measured on
the 400 mA scale.
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. Ignition ON, observe the DTC information with a
scan tool. DTC P0698 or P0699 should not be set.
➢ If a DTC is set, refer to "DTC P0698 or P0699".
2. Clear the DTC Info with a scan tool. Attempt to start
the engine, observe the DTC information with a scan
tool. DTC P0335, P0336, or P0338 should not set.
3. Move related harnesses/connectors of the CKP
sensor and verify the engine does not stumble, stall,
or change engine speed.
Engine General Information and Diagnosis:
4. 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, remove the fuse that supplies B+ to
terminal C2-56 of the ECM.
2. Disconnect the harness connector at the crankshaft
position (CKP) sensor.
3. Test for 5 ohms or less between the low reference
circuit terminal 1 and ground.
➢ If more than the specified value, test the open/high
resistance in the low reference circuit of the CKP
sensor. If the circuits/connections test normal,
replace the ECM.
4. Install the fuse that supplies B+ to terminal C2-56 of
the ECM.
5. Ignition ON, test for greater than 4.8 volts between
the 5-volt reference circuit terminal 3 and the low
reference circuit terminal 1.
➢ If less than the specified value, repair the open/high
resistance in the 5-volt reference circuit. If the
circuits/connections test normal, replace the ECM.
6. Test for 4.8-5.2 volts between the signal circuit
terminal 2 and ground.
➢ If the voltage is greater than specified range, test
for a short to voltage in the signal circuit of the CMP
sensor. If circuit/connections test normal, replace
the ECM.
NOTE
The signal circuit voltage can be within the
specified range with a high resistance in the
circuit. If this condition is suspected, refer to
Diagnostic Aids.
➢ If the voltage is less than the specified range, test
for a short to ground or an open/high resistance in
the signal circuit of the CMP sensor. If circuit/
connections test normal, replace the ECM.
7. If all circuits/connections test normal, test or replace
the CKP sensor.
Repair Instructions
Perform the "Diagnostic Repair Verification - Vehicle
Diagnostic Information: " after completing the diagnostic
procedure.
• "Crankshaft Position Sensor Replacement: "
• "Control Module References: " for engine control
module replacement, setup, and programming
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