Suzuki XL7 2007 Service Manual page 1560

5A-150 Automatic Transmission:
DTC P2536
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 P2536: Ignition Accessory Switch Circuit
Circuit/System Description
The transmission control module (TCM) continuously
monitors the ignition accessory voltage circuit. A low
ignition accessory voltage reading at the TCM will cause
DTC P2536 to set.
Conditions for Running the DTC
• No Engine Speed Circuit Malfunction, DTC P0727.
• No Lost Communications with the ECM, DTC U0100.
• NO CAN Bus Reset Counter Overrun, DTC U2104.
• Engine speed is 400 RPM or greater.
• Not in Emergency Mode.
Conditions for Setting the DTC
The TCM detects that ignition accessory voltage is less
than 8.68 volts for 20 seconds.
Action Taken When the DTC Sets
DTC P2536 is a Type A DTC.
Conditions for Clearing the DTC
DTC P2536 is a Type A DTC.
Diagnostic Aids
A charging system malfunction may cause variances in
system voltage and set voltage related DTCs. Refer to
"Charging System Test: ".
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
Engine running, verify the transmission control module
(TCM) scan tool ignition voltage parameter is greater
than 8.68 volts.
➢ If not greater than the specified range, refer to
"Charging System Test: " before performing Circuit/
System Testing.
Circuit/System Testing
NOTE
You must perform the Circuit/System
Verification before proceeding with Circuit/
System Testing.
1. Ignition OFF, disconnect the C1 harness connector
at the TCM.
2. Test for less than 1.0Ω of resistance between ground
circuit terminal 9 and ground.
➢ If greater than the specified value, test the ground
circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates
between the B+ circuit terminal 12 and ground.
➢ If the test lamp does not illuminate, test the B+
circuit for a short to ground or an open/high
resistance. If the circuit tests normal and the B+
circuit fuse is open, replace the TCM.
4. If all circuits test normal, replace the TCM.
Repair Instructions
Perform the "Diagnostic Repair Verification - Vehicle
Diagnostic Information: " after completing the diagnostic
procedure.