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TSB SB05-05-5004 Shift Lock Solenoid ISSUE DATE: MAY 2005 Affected Vehicles 2002-2004 Isuzu Axiom (UP) 1998-2004 Isuzu Rodeo (UE) and Rodeo Sport (UA) Service Information Use the following steps to remove and replace the Shift Lock Solenoid. Service Procedure 1. Access the Shift Lock Solenoid by removing the Center, Front, Rear Console Assemblies, Selector Lever Knob, and Cover Assembly. Refer to the Selector Lever section in the Service Manual. 2. Set parking brake, move Selector Lever to lowest gear, and remove the Shift Lock Cable. 3. Remove the two screws securing the Shift Lock Solenoid to the Selector Lever subassembly. Disconnect the Shift Lock Solenoid 2-pin connector. 4. Disconnect the 1-40 (Rodeo) or 1-3 (Axiom) six-pin connector and slide the female connector off bracket. Remove the Terminal Position Assurance (TPA) Lock from the connector. Locate the two blue wires in position 1 and 3 on the female connector. With appropriate tool (shown above), apply light pressure upward on the connector locking tab while gently pulling on the blue wire to release. Note :Never use force to remove a terminal from a connector. 5. Insert the two blues wires from the replacement Shift Lock Solenoid into the 1- 40 (Rodeo) or 1-3 (Axiom) female connector. It does not matter which blue wire is inserted into the 1 and 3 position. Gently tug the blue wires to make sure they are secure. NOTE iscard the extra 2-pin connector sub harness included with replacement Shift Lock Solenoid P/N 8-97181-068-2. 6. Reconnect the Shift Lock Solenoid 2-pin connector and reattach the two screws securing the Shift Lock Solenoid to the selector lever subassembly. 7. Reconnect the 1-40 (Rodeo) or 1-3 (Axiom) six-pin connector and slide the female connector onto the bracket. 8. Reinstall the Selector Lever Knob, Cover Assembly, Center, Front, and Rear Console Assemblies. Refer to the Selector Lever section in the Service Manual. 9. Check Shift Lock operation: a. With ignition key in “Lock” position, Selector lever should not move from “P” position. b. With ignition key in “ON” position and brake pedal depressed. Selector lever can be moved out of “P” position. c. Key can be removed only when turned to “LOCK” position and selector lever is in “P” position.

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Some customers may comment on harsh shifting and/or delayed upshifts that may or may not be accompanied by a CHECK TRANS lamp illumination. Correction Perform the TPS relearn procedure below. Important: The TCM relearn procedure MUST be done after replacement or adjustment of the following components: • The injection pump • The engine assembly • The accelerator pedal • The accelerator cable • The throttle position sensor (TPS) • The kick-down switch • The TCM • The transmission Failure to do this may result in a hard shift, delayed shift, slippage or excessive automatic transmission clutch material wear conditions. The TPS relearn procedure should also be done when the following conditions occur: • Harsh shifting • Delayed upshifts • Take-off in fail-safe mode (2nd gear) • Flashing Check Trans light (no stored codes) TPS Relearn Procedure If there is a change in the relationship between the TPS and the injection pump rack voltage, there will be a noticeable change in the shift pattern of the transmission. The TPS relearn is needed to provide the TCM with a correlation value between the TPS sensor and the injection pump rack position. It is this learned value that the TCM uses to produce the shift pattern for the transmission based on the TPS input during vehicle operation.

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NOTE: 1. Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE . Install a fuel pressure gauge between fuel pressure regulator and fuel distributor pipe. See Fig. 1 . Bleed air from fuel line going to pressure gauge. 2. Unplug fuel pressure regulator Vacuum Switching Valve (VSV) connector on right side fender skirt. This is a 4-wire connector with Black and Blue wires in harness. PCM controls VSV to cut vacuum to fuel pressure regulator during hot engine starts. 3. Start engine and measure fuel pressure at idle. Disconnect fuel pressure regulator vacuum hose. Note fuel pressure at idle with vacuum hose disconnected (no vacuum). Fuel pressure should be 42 psi (3.0 kg/cm2 ). See FUEL PUMP PERFORMANCE . 4. If fuel pump pressure is low, check for fuel leaks, restrictions in intake side of fuel pump, leaking injectors, faulty pressure regulator or faulty fuel pump. If fuel pressure is high, check for restrictions in return line to tank or faulty pressure regulator. If pressure does not change when pressure regulator is disconnected, replace pressure regulator. 5. Reconnect pressure regulator vacuum hose and check fuel pressure (with vacuum). Fuel pressure should be 35 psi (2.4 kg/cm2 ). Apply battery voltage to VSV connector Blue wire terminal, and ground Black wire terminal (with vacuum). See Fig. 2 . Fuel pressure gauge should read about 42 psi (3.0 kg/cm2 ). If fuel pressure is not within specification, check for defective VSV. 6. Disconnect and plug vacuum hose from fuel pressure regulator. Stop engine and ensure fuel pressure remains greater than 35 psi (2.4 kg/cm2 ) for 4 minutes after engine stops. 7. If pressure drops, check for leaking injectors, faulty pressure regulator or bad check valve in fuel pump. If engine does not start, by-pass fuel pump relay to check for fuel pressure. Remove fuel pump relay from underhood fuse/relay box. Connect a fused jumper wire between terminals No. 1 and 3 of fuel pump relay connector in fuse block. See Fig. 3 and Fig. 4 . 8. If fuel pump does not operate, check for battery voltage to terminal No. 3. If battery voltage is present, check for open in fuel pump circuit. If fuel pump operates with jumper wire installed, check fuel pump relay and relay energizing circuit. Repair as necessary. Begin basic fuel system diagnosis with testing fuel pressure.

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Fig. Fig. 1: Door panel assembly-early model Pick-up shown (other early models similar) Fig. Fig. 2: Door and panel assembly-later model Pick-up shown (other late models similar) Fig. Fig. 3: Door panel assembly-1995-96 Trooper Fig. Fig. 4: On Hombre models, if equipped, remove the accessory switch mounting plate Fig. Fig. 5: Hombre door handle trim panel and retainer screw Fig. Fig. 6: Hombre door panel assembly Fig. Fig. 7: Remove the retainer screws from the bottom of the armrest-1986 Trooper shown Fig. Fig. 8: With the screws removed from the armrest, detach the armrest from the door panel Fig. Fig. 9: If equipped with an ashtray, remove the ashtray … Fig. Fig. 10: … and remove the retainer screws securing the ashtray holder assembly Fig. Fig. 11: Remove the ashtray holder from the panel and place aside Fig. Fig. 12: Remove the door handle trim panel retainer screw Fig. Fig. 13: Use a suitable window crank removal tool between the crank and door panel … Fig. Fig. 14: … to separate the crank from the window regulator stud Fig. Fig. 15: Insert the crank arm clip to the crank, and remove the washer, then place the pieces aside Fig. Fig. 16: After removing the door panel, inspect the panel clip mounting holes for any clips which may have been left behind

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Fig. Fig. 1: Glow plug system schematic Fig. Fig. 2: Dropping resistor and glow plug relay locations Fig. Fig. 3: Thermo switch location Fig. Fig. 4: Dropping resistor check 1. To test the dropping resistor, check for continuity across the terminals as described in the illustration. If no continuity exists, replace the unit. 2. To test the thermo switch, first remove the switch. Submerge the end of the switch in water and raise the temperature gradually. The switch should be off at 126-140°F (53-60°C) or lower. The switch should be on at 134-145°F (57-63°C) or higher. If not, replace the switch. REMOVAL & INSTALLATION See Figure 5 Fig. Fig. 5: Location of the glow plugs The glow plugs are located under the injection nozzles, and are threaded into the cylinder head. 1. Disconnect the negative (-) battery cable. 2. Disconnect the glow plug and unscrew it from the engine. To install: 3. Lubricate with anti-seize compound before installing the plug. 4. Install and tighten the plug to 65 ft. lbs. (88 Nm). 5. Reconnect the plug wiring. 6. Connect the battery cable and check operation.