Contents Wiring diagrams Section: Ignition System All sections

Ignition System - Electrical Diagnostics: Diagnosis Dodge Cab & Chassis R3500 HD

Ignition System 1 illustration ~192 words

DIAGNOSTIC CODE INDEX

DTCDescription
B2104IGNITION RUN/START CONTROL CIRCUIT LOW
B2122IGNITION RUN CONTROL 1 CIRCUIT LOW
B2123IGNITION RUN CONTROL 1 CIRCUIT HIGH
B212FIGNITION RUN/ACC CONTROL CIRCUIT LOW
B2184IGNITION UNLOCK RUN/START CONTROL CIRCUIT LOW
B2188IGNITION START CONTROL CIRCUIT LOW
B218BIGNITION RUN/START 1 CONTROL CIRCUIT OVERCURRENT

DIAGNOSTIC CODE INDEX

Scheme 1

Scheme 1: Circuit Schematic

Diagnostic Test

  1. 1) CHECK FOR ACTIVE DTC With the scan tool, record and erase DTC's. Cycle the ignition switch from off to on, leaving the ignition off for a minimum of 30 seconds. With the scan tool, read the active DTC's. Does the scan tool display this DTC as active? Yes Go To 2) . No If the DTC is stored, check for an intermittent condition. Using the wiring diagram/schematic as a guide, visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
  2. 2) INSPECT THE TERMINALS & WIRE HARNESS FOR A CONDITION CAUSING HIGH CIRCUIT RESISTANCE Using the wiring harness as your guide, inspect the connector terminal for signs of corrosion build up and damage. Visually inspect the wiring harness for any chafed, pierced, pinched or partially broken wires hidden in the wire insulation. Were any of the above conditions found? Yes Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-303801-S12649440912008103100000) . No Replace the TIPM in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-303801-S12649440912008103100000) .