303-07C Velas aquecedoras 3.2

Glow Plug System – 3.2L Duratorq-TDCi (148kW/200PS) - Puma 303-07C-1 303-07C-1 . SECTION 303-07C Glow Plug System – 3.2L Duratorq-TDCi (148kW/200PS) - Puma VEHICLE APPLICATION: 2011.50 Ranger CONTENTS DESCRIPTION AND OPERATION Glow Plug System.............................................................................................................. DIAGNOSIS AND TESTING Glow Plug System.............................................................................................................. Inspection and Verification.................................................................................................. REMOVAL AND INSTALLATION Glow Plugs..................................................................................................... PAGE 303-07C-2 303-07C-4 303-07C-4 (23 777 0) 303-07C-5

303-07C-2 Glow Plug System – 3.2L Duratorq-TDCi (148kW/200PS) - Puma 303-07C-2 DESCRIPTION AND OPERATION Glow Plug System 1 4 3 2 E130077

Glow Plug System – 3.2L Duratorq-TDCi (148kW/200PS) - Puma 303-07C-3 303-07C-3 DESCRIPTION AND OPERATION Item Part Description Number 1 Glow plug indicator lamp 2 Glow plug(s) 3 Glow plug wire 4 Glow plug relay Glow Plugs The glow plugs are located in the side of the cylinder head and aid engine starting and efficiency. The glow plugs and the glow plug indicator lamp are controlled by the powertrain control module (PCM). The glow plugs preheat the combustion chambers, which aids cold starting. During the preheat stage, the PCM receives an engine temperature signal from the cylinder head temperature (CHT) sensor and this determines the preheat time. The lower the temperature, the longer the preheat time. There is a maximum preheat time of 8 seconds at -20°C or lower. At temperatures above 80°C there is no preheat phase. Once the engine has started, the glow plugs enter an after-glow phase. The after-glow phase helps to improve idling and reduce hydrocarbon emissions through more efficient combustion just after starting. The after-glow phase only operates at engine speeds below 2500 RPM, above that, the after-glow phase is interrupted to increase the durability of the glow plugs. There is a maximum after-glow time of 30 seconds at -20°C or lower. At temperatures above 50°C there is no after-glow phase.

Glow Plug System – 3.2L Duratorq-TDCi (148kW/200PS) - Puma 303-07C-4 303-07C-4 DIAGNOSIS AND TESTING Glow Plug System Inspection and Verification 1. Verify the customer concern. 2. Visually inspect for obvious signs of electrical damage. Visual Inspection Chart Electrical œ Fuse(s) œ Relay œ Wiring harness œ Electrical connector(s) œ Glow plug(s) œ Glow plug wire œ Powertrain control module (PCM) 3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step. 4. If the cause is not visually evident, verify the symptom and refer to WDS to diagnose the system.

Glow Plug System – 3.2L Duratorq-TDCi (148kW/200PS) - Puma 303-07C-5 303-07C-5 REMOVAL AND INSTALLATION Glow Plugs(23 777 0) Removal NOTE: Removal steps in this procedure may contain installation details. x4 1 E130137 Installation 1. To install, reverse the removal procedure 1. Refer to: Intake Manifold (303-01 Engine - 3.2L Duratorq-TDCi (148kW/200PS) - Puma, Removal and Installation). CAUTION: Make sure that all openings are sealed. 2. Torque: ‡ Glow plug wire retainer 8 Nm ‡ Glow plug 13 Nm 2 x4 3