Suzuki XL7 2007 Service Manual page 254

1A-149 Engine General Information and Diagnosis:
DTC P167D
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: " provide an overview of each
diagnostic category.
DTC Descriptors
DTC P167D: Ignition Control (IC) Performance
Circuit/System Description
The ignition system on this engine uses individual
ignition coils and ignition control (IC) circuits for each
cylinder. Ignition voltage is supplied to each bank of
ignition coils. Each ignition coil, with its control circuit is
connected to a separate ignition driver module within the
engine control module (ECM). The ECM detects faults
and controls the ignition system operation using this
separate ignition driver module via an SPI bus circuit.
The ignition driver module controls each coil using the IC
circuits. The ignition driver module commands the IC
circuit low when a spark event is requested. The ECM
monitors the configuration of the ignition driver module
and it ability to communicate with the ECM to determine
if a fault exists.
Conditions for Running the DTC
• The engine is operating.
• The igniting voltage is between 9-18 volts.
• The engine speed is less than 6000 RPM.
• DTC P167D runs continuously once the conditions
above are met.
Conditions for Setting the DTC
The ECM detects a condition with the integrated circuits
of the ignition driver module for greater than 4 seconds
or for a cumulative of 50 seconds.
Action Taken When the DTC Sets
DTC P167D is a Type B DTC.
Conditions for Clearing the DTC
DTC P167D is a Type B DTC.
Diagnostic Aids
If the condition is intermittent, move the related
harnesses and connectors, with the engine operating,
while monitoring the circuit status for the component with
a scan tool. The circuit status parameter changes from
OK or Indeterminate to Fault if there is a condition with
the circuit or a connection.
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. Idle the engine, view the DTC information with a
scan tool. DTC P167D should not set.
➢ If DTC P167D failed this ignition, replace the ECM.
2. 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 Data List.
Repair Instructions
Perform the "Diagnostic Repair Verification - Vehicle
Diagnostic Information: " after completing the diagnostic
procedure.
"Control Module References: " for engine control module
replacement, setup, and programming