Chrysler 2005 Crossfire SRT6 Service Manual page 3248

21 - 178 NAG1 - ELECTRICAL DIAGNOSTICS
(P1793) ENGINE TORQUE REDUCTION (CONTINUED)
When Monitored and Set Condition
• When Monitored: Engine intervention active for at least 20 ms, no engine torque errors, engine torque demand
is greater than 0.
• Set Condition: Torque Reduction acknowledge bit - not set, no shift aborts, the error flag Torque Reduction
Acknowledge is not set, Powertrain controller not supporting torque requests.
CAN BUS CIRCUIT DTC PRESENT
ENGINE DTCS PRESENT
CAN C BUS (+) / (-) CIRCUIT OPEN
POWERTRAIN CONTROL MODULE
TRANSMISSION CONTROL MODULE
For a complete Transmission Control Module Circuit Diagram, (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTO-
MATIC - NAG1 - SCHEMATICS AND DIAGRAMS).
For a complete CAN BUS Circuit Diagram, (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
SCHEMATICS AND DIAGRAMS).
Diagnostic Test
1.
PRE-DIAGNOSTIC CHECK OUT
Note: Low fluid level can be the cause of many transmission
problems. If the fluid level is low, locate and repair the leak then
check and adjust the fluid level in accordance with the Service
Information.
Note: Always perform diagnostics with a fully charged battery to
avoid false symptoms.
With the DRB III , read Engine DTCs. Check and repair all engine
DTCs prior to performing transmission symptom diagnostics.
With the DRB III , read and record all Transmission DTCs.
Note: Check connectors - Clean/repair as necessary. Poor pin to
terminal connections can set DTCs.
Using the wiring diagram/schematic as a guide, inspect the wiring and
connectors. Repair as necessary.
Most DTCs set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run.
Note: Check for any Technical Service Bulletins that may apply.
Perform this procedure prior to Symptom diagnosis.
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POSSIBLE CAUSES
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