2006 DODGE RAM SRT-10 Service Repair Manual

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Page 1257 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual P0355-IGNITION COIL #5 PRIMARY CIRCUIT
For a complete wiring diagramRefer to Section 8W.

Page 1258 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual When Monitored:
With battery voltage greater than 8 volts during engine cranking or greater than 12 volts with engine running,
engine rpm less than 2016, and none of the coils in dwell when checked.
S

Page 1259 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 3.IGNITION COIL RESISTANCE
Turn the Ignition off.
The resistance of a 8.3L Primary Ignition coil is 0.53 to 0.65 of an ohm.
Measure the resistance of the primary Ignition coil.
Is the resistance withi

Page 1260 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 6.(K134) IGNITION COIL CONTROL NO.5 CIRCUIT OPEN
Turn the Ignition off.
Disconnect the PCM harness connectors.
Measure the resistance of the (K134) Ignition Coil Control No.5 circuit
from the Ignition

Page 1261 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual P0420-1/1 CATALYTIC CONVERTER EFFICIENCY
For a complete wiring diagramRefer to Section 8W.

Page 1262 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual Theory of Operation
The upstream O2 sensor is used to detect the amount of oxygen in the exhaust gas before the gas enters the
catalytic converter. During the catalyst/O2 monitor test, the response ra

Theory of Operation
The upstream O2 sensor is used to detect the amount of oxygen in the exhaust gas before the gas enters the
catalytic converter. During the catalyst/O2 monitor test, the response rate (cycles/second) of the upstream O2 sen-
sor determines the sensor’s ability to achieve the tailpipe emissions limits. The response rate of the downstream O2
sensor relative to the upstream O2 sensor response rate measures the catalyst’s ability to store oxygen and is used
to infer the catalyst’s ability to achieve the tailpipe emissions limits.
When Monitored:
After engine warm up to 70°C (158°F), 180 seconds of open throttle operation, at a speed greater than 18 mph
and less than 55 mph, with the engine at 1200-1700 rpm and MAP vacuum between15.0 and 21.0 inches of
mercury (Hg).
Set Condition:
As catalyst efficiency deteriorates, the switch rate of the downstream O2sensor approaches that of the
upstream O2 sensor. If at any point during the test the switch ratio reachesa predetermined value a counter
is incremented by one. Three good trips to turn off the MIL.
Possible Causes
EXHAUST LEAK
ENGINE MECHANICAL
AGING O2 SENSOR
CATALYTIC CONVERTER
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.ACTIVE DTC
NOTE: A new rear O2 Sensor along with an aging front O2 Sensor may cause the DTCtoset.Reviewthe
repair history of the vehicle before continuing.
NOTE: If an O2 Sensor DTC set along with the Catalytic Converter EfficiencyDTC diagnose the O2 Sensor
DTC(s) before continuing.
NOTE: Check for contaminants that may have damaged the O2 Sensor and Catalytic Converter: contami-
nated fuel, unapproved silicone, oil and coolant, repair necessary.
Ignition on, engine not running.
With a scan tool, read DTCs.
Is the DTC active at this time?
Ye s>>
Go To 2
No>>
Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Page 1263 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 2.VISUALLY INSPECT CATALYTIC CONVERTER
Inspect the Catalytic Converter for the following damage.
Damaged Catalytic Converter, dents or holes.
Severe discoloration caused by overheating the Catalytic C

Page 1264 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual P0432-2/1 CATALYTIC CONVERTER EFFICIENCY
For a complete wiring diagramRefer to Section 8W.

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