Suzuki XL7 2007 Service Manual page 213

P0343, P0348, P0368, P0393
The CMP sensor signal voltage is always high and the
ECM detects no pulses from the CMP sensor for more
than 4 seconds or cumulative of 50 seconds.
Action Taken When the DTC Sets
DTCs P0341, P0342, P0343, P0346, P0347, P0348,
P0366, P0367, P0368, P0391, P0392, and P0393 are
Type B DTCs.
Conditions for Clearing the DTC
DTCs P0341, P0342, P0343, P0346, P0347, P0348,
P0366, P0367, P0368, P0391, P0392, and P0393 are
Type B DTCs.
Diagnostic Aids
• 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.
• The following conditions can also set the DTC:
– Physical damage to the CMP sensor or the reluctor
wheel
– Excessive play or looseness of the CMP sensor or
the reluctor wheel
– Improper installation of the CMP sensor or the
reluctor wheel
– Foreign material passing between the CMP sensor
and the reluctor wheel
– Excessive air gap between the CMP sensor and
the reluctor wheel
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)"
Engine General Information and Diagnosis:
Circuit/System Verification
1. Ignition ON, observe the DTC information with a
scan tool. DTC P0652 or P0653 should not be set.
➢ If a DTC is set, refer to "DTC P0652 or P0653".
2. Engine idling, observe the DTC information with a
scan tool. DTCs P0341, P0342, P0343, P0346,
P0347, P0348, P0366, P0367, P0368, P0391,
P0392, and P0393 should not set.
3. 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 appropriate
CMP sensor.
NOTE
The control module or the sensor may be
damaged if the circuit is shorted to B+
voltage.
3. Test for 5 ohms or less between the low reference
circuit terminal 1 and ground.
➢ If greater than 5 ohms, test the low reference circuit
for an open/high resistance or for a short to voltage.
If the circuit/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 ground.
➢ If less than the specified value, test the 5 volt
reference circuit for an open/high resistance. 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, replace the
CMP sensor.
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