Autopapyrus · Dodge Caliber 1.8 (2006)
https://autopapyrus.com/guides/dodge/caliber/starting-circuit-diagnostics/
https://autopapyrus.com/guides/dodge/caliber/starting-circuit-diagnostics/
Compiled automatically from service literature and owner experience. Specs are for the typical configuration — check them against your exact car before you start.
Dodge Caliber 1.8 (2006): Starting Circuit Diagnostics
Typical causes of a no-crank or no-start condition on the Caliber: a weak battery or corroded terminals, a worn ignition switch, a failed wireless control module (WCM) with the immobilizer, and a faulty TIPM with its starter relay. Diagnose from simple to complex: power, grounds, key and immobilizer, ignition switch, relay, starter.
Part
- 🔩 Depends on diagnostic results. Typical candidates: ignition switch (ignition lock) assembly, wireless control module (WCM) with immobilizer, TIPM (Totally Integrated Power Module, the underhood power distribution unit with the starter relay built in), starter, battery terminals and ground cables. Exact part numbers are not listed because they depend on trim level and market
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Step by step
10 steps- Identify the symptom. Starter is silent but the instrument cluster lights up: look at the ignition switch, immobilizer, relay or start circuit. Starter clicks or cranks slowly: battery, terminals, grounds, or the starter itself. Starter cranks but the engine does not fire: the cause is outside the start circuit (fuel, spark, or the immobilizer blocking fuel injection).
- Check the battery and terminals. Resting voltage should be about 12.4-12.7 V, and during cranking not lower than about 9.5-10 V. Remove the terminals, clean them and their contact surfaces, and check the tightness. Inspect the negative cable to the body and to the engine block. This is a common hidden cause.
- Watch the immobilizer indicator on the instrument cluster when you turn the ignition on. If it stays on or flashes continuously and starting is blocked, try the second key and read the codes with a scan tool. A known weak point of this model is failure of the wireless control module (WCM), which prevents the engine from starting. After replacing such a module and the keys, a programming (key sync) procedure with a scan tool is required. It cannot be done without the proper equipment, so take the car to a repair shop that has it.
- Read the fault codes from all modules (PCM, BCM, WCM). Communication codes with modules, start circuit codes or immobilizer codes narrow down the search right away. Do not clear them before writing them down.
- Check the fuses in the TIPM under the hood and in the interior fuse box in the cabin. Use the diagram on the cover of the box. Inspect the seating of the module and its connectors: signs of moisture, green corrosion and burnt contacts on the TIPM are typical for this car.
- Check the ignition switch. It reports the key position to the control modules through a circuit with a set of resistances to ground (approximate resistance by position: key removed about 21 kΩ, key inserted about 8 kΩ, ACC about 1.5 kΩ, RUN about 570 Ω, START about 177 Ω). Measure the values against the wiring diagram for your car, as some variation is normal. If the resistance in the START position fluctuates or differs greatly, and the power on the second section (12 V in RUN and START) is lost, the switch is worn. It is replaced together with the lock mechanism, and depending on the design you may need to remove the steering column cover.
- Check the starter relay. On the Caliber it is built into the TIPM and is usually not replaced separately. Check whether the engage command is arriving: when you turn the key to START you should hear a click and power should appear at the starter solenoid winding. If the command is present but the relay does not operate or there is no power at the output, the cause is the TIPM. It can be repaired by a specialist shop, and replacing the module usually requires programming.
- Check the wire from the power module to the starter solenoid. Turn the ignition on, turn the key to START and measure the voltage at the starter solenoid terminal. It should be close to battery voltage. If 12 V is present but the starter is silent, the problem is the starter itself or its ground. If there is no voltage, work back along the circuit: TIPM, ignition switch, immobilizer.
- Inspect the wiring harnesses for breaks and chafing. The main areas are under the steering column, near the TIPM, and where the harness passes through the firewall. Use a multimeter to test suspect wires for open circuits and shorts to ground, and repair by soldering with heat-shrink tubing, not twist connections.
- After the repair, test starting several times, both cold and warm, then connect the scan tool and make sure there are no new codes. If the fault is intermittent, do not stop at replacing a single part: first find the cause and confirm it by measurement.
Common mistakes and warnings
- Before removing the steering column cover and working near the ignition switch, disconnect the negative battery terminal and wait several minutes: airbags and their circuits are nearby, and accidental deployment is dangerous. If you have no experience with electrical work or airbags, leave the steering column removal to a specialist. Replace the WCM or TIPM and sync the keys only with diagnostic equipment, otherwise the engine will not start.