Engine Coolant Temperature Gage; Inaccurate Or Inoperative; Engine Oil Pressure Indicator Always - Suzuki XL7 2007 Service Manual

9C-45 Instrumentation / Driver Info. / Horn:

Engine Coolant Temperature Gage

Inaccurate or Inoperative

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: ".
Circuit/System Description
The instrument panel cluster (IPC) displays the engine
coolant temperature as determined by the engine control
module (ECM). The IPC receives a serial data message
from the ECM indicating the engine coolant temperature.
Reference Information
Schematic Reference
"Instrument Cluster Schematics"
Connector End View Reference
"Displays and Gages Connector End Views"
Description and Operation
"Instrument Cluster Description and Operation"
Electrical Information Reference
• "Circuit Testing: "
• "Connector Repairs: "
• "Testing for Intermittent Conditions and Poor
Connections: "
• "Wiring Repairs: "
Scan Tool Reference
• "Scan Tool Output Controls - Displays and Gages"
• "Scan Tool Data List - Displays and Gages"
• "Scan Tool Data Definitions - Displays and Gages"
Circuit/System Testing
Ignition ON, perform the engine coolant gage sweep test
with the scan tool.
➢ If the engine coolant gage does not sweep from its
low to high position, replace the IPC.
Repair Instructions
Perform the "Diagnostic Repair Verification - Vehicle
Diagnostic Information: " after completing the diagnostic
procedure.
"Control Module References: " for the IPC replacement,
setup, and programming
Engine Oil Pressure Indicator Always On
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: ".
Circuit/System Description
The engine oil pressure (EOP) switch is a normally
closed switch that opens with the proper oil pressure.
With the ignition switch turned ON and the engine not
running, the engine control module (ECM) should detect
a low signal voltage input. With the engine running, the
pressure switch opens, and the ECM should detect a
high signal voltage input.
Reference Information
Schematic Reference
• "Instrument Cluster Schematics"
• "Engine Controls Schematics: "
Connector End View Reference
• "Displays and Gages Connector End Views"
• "Engine Control Module Connector End Views: "
Electrical Information Reference
• "Circuit Testing: "
• "Connector Repairs: "
• "Testing for Intermittent Conditions and Poor
Connections: "
• "Wiring Repairs: "
Scan Tool Reference
"Scan Tool Data List - Displays and Gages"
Circuit/System Testing
1. Ignition ON, engine ON, verify the scan tool Engine
Oil Pressure Switch parameter is Low.
➢ If not Low, replace the instrument panel cluster
(IPC).
2. Ignition OFF, disconnect the harness connector at
the EOP switch.
3. Ignition ON, verify the scan tool Engine Oil Pressure
Switch parameter is OK.
➢ If not OK, test the signal circuit of the EOP switch
for a short to ground. If the circuit tests normal,
replace the ECM.
4. If all circuits test normal, test or replace the EOP
sensor.