This bulletin applies to 2011-2013 Jeep Patriot MK and Compass vehicles equipped with a 2.4L engine and either the continuously variable transaxle or the continuously variable transaxle with an off-road crawl ratio.
The MIL may be on, accompanied by DTC P050B (cold start ignition timing performance) and/or a rattle/clatter sound on cold start-up. This bulletin involves installing revised heater hoses, routing the purge solenoid wire harness and installing revised PCM software.
Required parts include:
- Heater core supply hose 05058822AB- Heater core return hose 05058823AB
- Authorized modification label 04275086AD
- Engine coolant 68048953AB
- Shifter cable 68024433AC
Replace the transmission shifter cable. Remove the right wheel inner splash shield. Place a clean collecting container under the draincock location. Without removing the pressure cap and with the system not under pressure, turn the draincock counterclockwise to open. The coolant reserve bottle should be emptied first. Then remove the pressure cap. Allow the cooling system to drain completely.
Remove both the heater core supply and return the hoses.
Install the new heater core supply hose and new heater core return hose.
Install the right wheel inner splash shield.
Remove the engine cover.
To ensure that the purge solenoid wiring harness does not come into contact with the heater hoses, the wiring harness will require a slight modification. Loosely pull the purge solenoid wire harness straight and create a bend in the harness approximately 10mm (3.8 to 7/16 inches away from the harness retaining clip edge. This bend will also create a natural bend after the current spot tape on the harness. Then apply three-to-four wraps of electrical tape securing the bend to the harness. Install the engine cover and fill the cooling system, making sure that no air is trapped.
Install a battery charger to maintain battery voltage between 13.2 and 13.5 volts and reprogram the PCM with the latest software. Clear any DTCs.
