Engine Controls - Basic Testing - 2.6L: Other Honda Passport I

TERMINOLOGY

Due to Federal government requirements, manufacturers may use names and acronyms for systems and components different than those used in previous years. The following table will help eliminate confusion when dealing with these components and systems.

SAE TERMINOLOGY

Compression

Check engine mechanical condition with a compression gauge, vacuum gauge, or an engine analyzer. See engine analyzer manual for specific instructions.

Exhaust System Backpressure

The exhaust system can be checked with a vacuum or pressure gauge. If using a pressure gauge, remove oxygen sensor or air injection check valve (if equipped). Connect a 0-5 psi pressure gauge and run engine at 2000 RPM. If exhaust system backpressure is greater than 1 3/4 - 2 psi, exhaust system or catalytic converter is plugged.

If a vacuum gauge is used, connect vacuum gauge hose to intake manifold vacuum port and start engine. Observe vacuum gauge. Open throttle part way and hold steady. If vacuum gauge reading slowly drops after stabilizing, check exhaust system for restriction.

FUEL SYSTEM

FUEL SYSTEM PRESSURE RELEASE

Note. Fuel pump relay is located in engine compartment fuse/relay box.

1. Loosen fuel tank filler cap to relieve tank pressure. Remove fuel pump relay from underhood fuse/relay box. Start and operate engine until it stalls. Crank engine an additional 30 seconds.
2. Loosen hose clamp of fuel line on side of pressure regulator, coming from fuel line inlet distributor pipe. Cover fuel hose with a shop towel, and slowly pull hose from pressure regulator to relieve fuel pressure. When fuel stops leaking, reinstall hose and clamp.

Fuel Pump Relay

1. Power from charging circuit relay runs through fuse/relay box fuse No. 5 and diode box "A" to energize fuel pump relay. Relay is also energized from diode box "A" through oil pressure switch circuit in case of charging system failure.
2. When energized, fuel pump relay closes power circuit from main fuse No. 1, through fuse No. 2, through fuel pump relay to fuel pump. See appropriate WIRING DIAGRAM in «WIRING DIAGRAMS»(ref-15943-S32341103142000122900000) section at the end of this article.
3. To test relay, remove fuel pump relay from fuse/relay box on right fender panel. Using jumper wires, ground terminal No. 4 (Black wire) and apply battery voltage to terminal No. 5 (White wire). see scheme 4 There should be continuity between terminals No. 1 and 3 with relay energized. If continuity is not present, replace relay. FUEL PUMP PERFORMANCE Application Unregulated Pressure psi (kg/cm 2 ) Regulated Pressure psi (kg/cm 2 ) 2.6L (1) (2) 42 (2.9) (3) 35 (2.4) (1) With Vacuum Switching Valve (VSV) connector unplugged and pressure regulator vacuum hose disconnected. (2) With pressure regulator vacuum hose connected, 12 volts applied to VSV Blue wire terminal and Black wire terminal grounded. (3) With pressure regulator vacuum hose connected and VSV disconnected.

Ignition System Check

Information is not available from manufacturer.

Scheme 50

1. Ensure ignition is off. Disconnect ignition coil wiring. Measure primary resistance between terminals "C" and "E". (Scheme 50) Measure secondary resistance between terminals "C" and "D". Measure insulation resistance between terminals "C" and body ground.
2. Make sure resistance is within specification. Refer to «IGNITION COIL RESISTANCE (NON-HEI SYSTEMS)»(ref-15943-S33711671622000122900000). Replace coil if resistance is not within specification. IGNITION COIL RESISTANCE (NON-HEI SYSTEMS) Application (1) Primary Ohms @ 68°F (20°C) Secondary Ohms @ 68°F (20°C) 2.6L.81-.99 7500-11,300 (1) Insulation resistance should not be more than 10 megohms.

Crankshaft Position Sensor

Testing information is not available from manufacturer. However, faults in crankshaft position sensor will set Code 41. See TESTS W/CODES - 2.6L article.

Note. A faulty power transistor or circuit will set Code 23, 35 or 54. See TESTS W/CODES - 2.6L article. Wire colors may vary. See appropriate WIRING DIAGRAM in WIRING DIAGRAMS section at the end of this article.

Scheme 51

1. Ensure ignition is off. Remove coil wire from distributor cap. Attach Spark Tester (J-26792 ), or, using insulated pliers, hold distributor terminal end of coil wire about 1/4" (5 mm) from metal surface.
2. Disconnect and remove power transistor from under intake manifold. This involves removing right front wheel and rubber inner fender panel cover to access power transistor.
3. Connect jumper wire between harness connector and power transistor connector Blue wire terminal. Connect negative end of 1.5-volt "D" battery to power transistor Green wire terminal. (Scheme 51) Connect positive end of 1.5-volt "D" battery to harness connector Yellow wire terminal. Ground power transistor.
4. Turn ignition on with engine off. Disconnect and connect jumper lead at power transistor connector several times. Verify spark is jumping across air gap at spark tester. If spark does not occur, check wiring for continuity or shorts. If wiring is okay, replace power transistor.

IDLE SPEED & IGNITION TIMING

For adjustment procedures, see ADJUSTMENTS - 2.6L article.

IDLE SPEED SPECIFICATIONS

BASE IGNITION TIMING

SUMMARY

If no faults were found while performing BASIC DIAGNOSTIC PROCEDURES, proceed to TESTS W/CODES - 2.6L article. If no hard codes are found in self-diagnostics, proceed to TESTS W/O CODES - 2.6L article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.) or intermittent diagnostic procedures.

Wiring Diagram (1 Of 3). Scheme 52

Wiring Diagram (2 Of 3). Scheme 53

Wiring Diagram (3 Of 3). Scheme 54