Suzuki XL7 2007 Service Manual page 1551

DTC P081A or P081B
Diagnostic Instructions
• Perform the "Diagnostic System Check - Vehicle Diagnostic Information: " prior to using this diagnostic procedure.
• Review "Strategy Based Diagnosis: " for an overview of the diagnostic approach.
• "Diagnostic Procedure Instructions - Vehicle Diagnostic Information: " provides an overview of each diagnostic
category.
DTC Descriptor
DTC P081A: Starter Inhibit Circuit Low Voltage
DTC P081B: Starter Inhibit Circuit High Voltage
Diagnostic Fault Information
Circuit
Starter Inhibit Circuit
Circuit/System Description
The transmission range (TR) switch is an integral part of
the transmission control module (TCM). As the gear
range selector lever is moved, the state of the Starter
Inhibit Circuit may change, causing the circuit to open or
close. An open circuit indicates a drive range and a low
voltage signal, 0 volts, at the engine control module
(ECM). A closed circuit indicates PARK or NEUTRAL
and a high voltage, 12 volts, signal at the ECM.
The ECM uses the Starter Inhibit circuit status from the
TCM in order to enable starter operation.
Conditions for Running the DTC
• Start Lock Driving voltage is within 6.0-16.0 volts.
• Ignition voltage is greater than 6.5 volts.
Conditions for Setting the DTC
DTC P081A
The ECM detects "ON" signal from the Starter Inhibit
circuit while the TCM is commanding the Starter Inhibit
circuit "OFF" for 0.5 seconds.
DTC P081B
The ECM detects "OFF" signal from the Starter Inhibit
Circuit while the TCM is commanding the Starter Inhibit
Circuit "ON" for 0.5 second.
Action Taken When the DTC Sets
None
Conditions for Clearing the DTC
DTC P081A and P081B are Type A DTCs.
Short to Open/High
Ground Resistance
P081A P081A
Reference Information
Schematic Reference
"Automatic Transmission Controls Schematics"
Connector End View Reference
• "Automatic Transmission Inline Harness Connector
End View"
• "Automatic Transmission Internal Connector End
Views"
• "Automatic Transmission Related Connector End
Views"
Electrical Information Reference
• "Circuit Testing: "
• "Connector Repairs: "
• "Testing for Intermittent Conditions and Poor
Connections: "
• "Wiring Repairs: "
DTC Type Reference
• "Diagnostic Trouble Code (DTC) Type Definitions"
• "Diagnostic Trouble Code (DTC) List/Type"
Scan Tool Reference
• "Scan Tool Output Controls - Automatic Transaxle -
AF33-5"
• "Scan Tool Data List - Automatic Transaxle - AF33-5"
• "Scan Tool Data Definitions - Automatic Transaxle -
AF33-5"
Circuit/System Verification
1. Ignition ON, observe the DTC information with a
scan tool.
2. Record Freeze Frame and Failure Records.
3. Clear DTCs.
4. Operate the vehicle under the conditions observed in
the Failure Records.
5. Observe the DTC information with the scan tool.
Verify that the DTC does not set.
Automatic Transmission:
Signal
Short to Voltage
Performance
P081B
5A-141
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