Chrysler 2005 Crossfire SRT6 Service Manual page 3192

21 - 122 NAG1 - ELECTRICAL DIAGNOSTICS
(P0730) IMPROPER RATIO (CONTINUED)
When Monitored and Set Condition
• When Monitored: Engine speed greater than 450 RPM, output speed greater than 180 RPM, no N2 - N3 input
speed sensor errors present, no gear selector lever errors present, no ABS system errors, and all wheel
speeds above 450 RPM.
• Set Condition: No shifting operation and detected gear is not the actual gear. No shifting operation - detected
(calculated) gear is less than actual (expected) gear, no plausible gear is calculated, actual turbine speed -
calculated turbine speed >300 RPM or calculated transmission ratio is above threshold. During an Upshift -
detected (calculated) gear is less than actual (expected) gear-1. During Downshift - detected (calculated) gear
is less than actual (expected) gear.
INTERNAL TRANSMISSION
TRANSMISSION CONTROL MODULE
For a complete Transmission Control Module Circuit Diagram, (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTO-
MATIC - NAG1 - 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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