Engine Controls - Basic Diagnostic Procedures: Diagnosis Honda CR-V I рестайлинг

VISUAL INSPECTION

Visually inspect all electrical wiring for chafed, stretched, cut or pinched wiring. Ensure electrical connectors fit tightly and are not corroded. Ensure vacuum hoses are properly routed and not pinched or cut. See VACUUM DIAGRAMS article to verify routing and connections. Inspect air induction system for possible vacuum leaks.

Basic Diagnosis

Begin basic diagnosis of fuel system by determining fuel system pressure. Check fuel pump operation. If fuel pump fails to run, inspect power supply to PGM-FI main relay. If all power supplies are present (i.e., battery, ignition and starter switch during cranking), perform functional test of PGM-FI main relay. See WIRING DIAGRAMS and SYSTEM & COMPONENT TESTING articles.

Pressure Testing (Accord & S2000)

1. Disconnect negative battery terminal. Release fuel pressure. See «FUEL SYSTEM PRESSURE RELEASE»(ref-3102-S30996562082000041700000) . Remove fuel pulsation damper. Connect Fuel Pressure Gauge (07406-0040001 on Accord, or 07406-004000A on S2000) and Fuel Pressure Gauge Adapter (07VAJ-0040100). Reconnect negative battery terminal. Disconnect vacuum hose from fuel pressure regulator and pinch line closed. Start engine and allow to idle. If engine starts, go to step 3 . If engine will not start, go to next step.
2. Remove fuel fill cap. Have an assistant turn ignition on. Listen for fuel pump operation at fuel fill tube. Fuel pump should run for 2 seconds. If fuel pump does not operate properly, test fuel pump. See FUEL SYSTEM in SYSTEM & COMPONENT TESTING article. If fuel pump operates properly, go to next step.
3. Read fuel pressure. See «FUEL PRESSURE»(ref-3102-S15019311392000041700000) table. Attempt to start engine. If engine does not start, repair engine as necessary and go to next step. If engine starts and fuel pressure is as specified, go to next step. If engine starts and fuel pressure is not as specified, go to step 5 .
4. With engine idling, release and reconnect vacuum hose to fuel pressure regulator. Read fuel pressure. See «FUEL PRESSURE»(ref-3102-S15019311392000041700000) table. If fuel pressure is as specified, fuel system is okay at this time. If pressure is not as specified, go to next step.
5. With engine idling, disconnect vacuum hose from pressure regulator again. Pressure should rise when hose is disconnected. If pressure did not rise, replace fuel pressure regulator. If pressure rose, but readings were lower than specified, check for clogged fuel filter or fuel line leakage. If pressure rose, but readings were higher than specified, check for pinched or clogged fuel return hose.
6. Relieve fuel pressure and remove gauge. Reinstall fuel pulsation damper using NEW copper washers and tighten to 16 ft. lbs. (22 N.m). Start engine and check for leaks.

Pressure Testing (Civic, CR-V & Prelude)

1. Disconnect negative battery terminal. Release fuel pressure. See «FUEL SYSTEM PRESSURE RELEASE»(ref-3102-S30996562082000041700000) . On Civic and CR-V, remove 12-mm banjo bolt from top of fuel filter. On Prelude, remove banjo bolt from fuel rail. On all models, connect Fuel Pressure Gauge (07406-0040001) and Fuel Pressure Gauge Adapter (90008-PD6-010). Reconnect negative battery terminal. Disconnect vacuum hose from fuel pressure regulator and pinch line closed. Start engine, and read fuel pressure. If engine starts, go to next step. If engine will not start, turn ignition on, wait for 2 seconds, turn ignition off, then on again and read fuel pressure. See «FUEL PRESSURE»(ref-3102-S15019311392000041700000) table.
2. With engine idling, reconnect vacuum hose to fuel pressure regulator and release fuel return line. Read fuel pressure. Both gauge readings should be within specification. See «FUEL PRESSURE»(ref-3102-S15019311392000041700000) table. If fuel pressure readings are within specification, go to next step. If fuel pressure is not as specified, check fuel pump operation. See FUEL SYSTEM in SYSTEM & COMPONENT TESTING article. If fuel pressure is higher than specified, check for pinched or clogged fuel return hose or defective fuel pressure regulator. If fuel pressure is lower than specified, check for clogged fuel filter, defective fuel pressure regulator or fuel line leakage.
3. Relieve fuel pressure and remove gauge. On Civic and CR-V, tighten 12-mm banjo bolt to 25 ft. lbs. (33 N.m). On Prelude, tighten 12-mm banjo bolt to 16 ft. lbs. (22 N.m). Start engine and check for leaks.

Pressure Testing (Odyssey)

1. Disconnect negative battery terminal. Release fuel pressure. See «FUEL SYSTEM PRESSURE RELEASE»(ref-3102-S30996562082000041700000) . Remove fuel pulsation damper. Connect Fuel Pressure Gauge (07406-0040001 on Accord, or 07406-004000A on S2000) and Fuel Pressure Gauge Adapter (07VAJ-0040100). Reconnect negative battery terminal. Disconnect vacuum hose from fuel pressure regulator and pinch line closed. Start engine and allow to idle. If engine starts, go to step 3 . If engine will not start, go to next step.
2. Remove fuel fill cap. Have an assistant turn ignition on. Listen for fuel flow at fuel injector rails underneath intake manifold cover. Fuel flow should be heard for 2 seconds. If fuel flow is heard (fuel pump operates properly), go to next step. If fuel flow is not heard (fuel pump does not operate properly), test fuel pump. See FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
3. Read fuel pressure. See «FUEL PRESSURE»(ref-3102-S15019311392000041700000) table. Attempt to start engine. If engine does not start, repair engine as necessary and go to next step. If engine starts and fuel pressure is as specified, go to next step. If engine starts and fuel pressure is not as specified, go to step 5 .
4. With engine idling, release and reconnect vacuum hose to fuel pressure regulator. Read fuel pressure. See «FUEL PRESSURE»(ref-3102-S15019311392000041700000) table. If fuel pressure is as specified, fuel system is okay at this time. If pressure is not as specified, go to next step.
5. With engine idling, disconnect vacuum hose from pressure regulator again. Pressure should rise when hose is disconnected. If pressure did not rise, replace fuel pressure regulator. If pressure rose, but readings were lower than specified, check for clogged fuel filter or fuel line leakage. If pressure rose, but readings were higher than specified, check for pinched or clogged fuel return hose.
6. Relieve fuel pressure and remove gauge. Reinstall fuel pulsation damper using NEW copper washers and tighten to 16 ft. lbs. (22 N.m). Start engine and check for leaks.

FUEL PRESSURE

Internal Ignition Coil Resistance Test (Accord 2.3L, Civic & CR-V)

1. Turn ignition off. Remove distributor cap, rotor and leak cover. Remove primary leads from ignition coil. Using an ohmmeter, check primary resistance between ignition coil terminals "A+" and "B-". (Scheme 1) Resistance should be as specified. See «IGNITION COIL RESISTANCE»(ref-3102-S19941351822000041700000) table.
2. Check secondary resistance between ignition coil terminal "A+" and secondary output terminal (ignition coil tower). See «IGNITION COIL RESISTANCE»(ref-3102-S19941351822000041700000) table. If readings are not as specified, replace ignition coil.

Scheme 1

External Ignition Coil Resistance Test (Prelude)

1. Turn ignition off. Remove Primary and secondary leads from ignition coil. Using an ohmmeter, check primary resistance between ignition coil connector terminals "A" and "B". (Scheme 2) Resistance should be as specified. See «IGNITION COIL RESISTANCE»(ref-3102-S19941351822000041700000) table.
2. Check secondary resistance between ignition coil connector terminal "A" and secondary output terminal (ignition coil tower). See «IGNITION COIL RESISTANCE»(ref-3102-S19941351822000041700000) table. Check for continuity between terminals "A" and "C". Continuity should exist. If readings are not within specification, replace ignition coil.

IGNITION COIL RESISTANCE - Ohms @ 68°F (20°C)

Scheme 2

Ignition Coil Test (Accord 3.0L & Odyssey)

Note. Ensure ignition, fuel and emission systems are working properly before performing ignition coil test.

1. Remove ignition coil cover. Loosen suspect ignition coil bolt. Disconnect suspect ignition coil connector. Turn ignition on. Measure voltage between ground and ignition coil harness connector terminal No. 3 (Black/Yellow wire). (Scheme 3) If battery voltage exists, go to next step. If battery voltage does not exist, check for open in Black/Yellow wire between suspect ignition coil and fuse No. 11 (15-amp). See WIRING DIAGRAMS article. Fuse is located in underdash fuse/relay box, behind left end of instrument panel (Accord 3.0L), or behind left kick panel (Odyssey).
2. Turn ignition off. Check for continuity between ground and suspect ignition coil harness connector terminal No. 2 (Black wire). If continuity exists, go to next step. If continuity does not exist, check for open in Black wire between suspect ignition coil and ground connector G101. Ground connector G101 is located at left side of engine, on thermostat housing, under radiator fan switch.
3. Disconnect PCM 31-pin connector "C". Check for continuity between body ground and PCM 31-pin harness connector "C" terminals No. 3 (Blue wire), No. 4 (Yellow/Green wire), No. 12 (Black/Red wire), No. 13 (Yellow wire), No. 14 (Red wire) and/or No. 23 (White/Blue wire). If continuity does not exist, go to next step. If continuity exists, check for short to ground in wire between suspect ignition coil terminal No. 1 and PCM 31-pin connector "C".
4. Reconnect PCM 31-pin connector "C". Turn ignition switch to START position. Measure voltage between ground and suspect ignition coil harness connector terminal No. 1. (Scheme 3) If about.5 volt exists, replace ignition coil. If about.5 volt does not exist, check for open in wire between suspect ignition coil terminal No. 1 and PCM 31-pin connector "C".

Scheme 3

Ignition Coil Test (S2000)

Note. Ensure ignition, fuel and emission systems are working properly before performing ignition coil test.

1. Remove ignition coil cover. Loosen suspect ignition coil bolt. Disconnect suspect ignition coil connector. Turn ignition on. Measure voltage between ground and ignition coil harness connector terminal No. 3 (Black/Yellow wire). (Scheme 3) If battery voltage exists, go to next step. If battery voltage does not exist, check for open in Black/Yellow wire between suspect ignition coil and fuse No. 4 (15-amp). See WIRING DIAGRAMS article. Fuse is located in underdash fuse/relay box, behind left kick panel.
2. Turn ignition off. Check for continuity between ground and suspect ignition coil harness connector terminal No. 2 (Black wire). If continuity exists, go to next step. If continuity does not exist, check for open in Black wire between suspect ignition coil and ground connector G101. Ground connector G101 is located at rear of engine head.
3. Disconnect PCM 31-pin connector "C". Check for continuity between body ground and PCM 31-pin harness connector "C" terminals No. 4 (White wire), No.12 (White/Green wire), No. 13 (White/Black wire) and/or No. 14 (White/Blue wire). If continuity does not exist, go to next step. If continuity exists, check for short to ground in wire between suspect ignition coil terminal No. 1 and PCM 31-pin connector "C".
4. Reconnect PCM 31-pin connector "C". Turn ignition switch to START position. Measure voltage between ground and suspect ignition coil harness connector terminal No. 1. If about 1-2 volts exists, replace ignition coil. If about 1-2 volts do not exist, check for open in wire between suspect ignition coil terminal No. 1 and PCM 31-pin connector "C".

Ignition Control Module (ICM) Input Test (Accord 2.3L)

1. Turn ignition off. Remove distributor cap, rotor and leak cover. Disconnect wires from ICM. (Scheme 4)or (Scheme 5). Turn ignition on. Check for voltage between ground and ICM Black/Yellow wire. If battery voltage exists, go to next step. If battery voltage does not exist, check for open in Black/Yellow wire between ignition switch and ICM. See WIRING DIAGRAMS article.
2. Ensure ignition is on. Check for voltage between ground and ICM White/Black wire (F23A1 and F23A4 engines), or White/Blue wire (F23A5 engine). (Scheme 4)or (Scheme 5). If battery voltage exists, go to next step. If battery voltage does not exist, check ignition coil operation. See «INTERNAL IGNITION COIL RESISTANCE TEST (ACCORD 2.3L, CIVIC & CR-V)»(ref-3102-S10214844852000041700000). Replace ignition coil as necessary. If ignition coil is okay, check for open in White/Black wire (F23A1 and F23A4 engines) or White/Blue wire (F23A5 engine), between ICM and ignition coil.
3. Turn ignition off. Disconnect PCM 25-pin "B" connector. Check for continuity in Yellow/Green wire between PCM 25-pin connector terminal No. 13 and ICM. If continuity exists, go to next step. If continuity does not exist, repair open in Yellow/Green wire.
4. Check for continuity between ground and Yellow/Green wire. If continuity exists, check for short to ground in Yellow/Green wire. If continuity does not exist, wiring is okay at this time. Replace ICM.

Ignition Control Module (ICM) Input Test (Civic)

1. Turn ignition off. Remove distributor cap, rotor and leak cover (TEC). Disconnect wires from ICM. (Scheme 6)or (Scheme 7). Turn ignition on. Check for voltage between ground and Black/Yellow wire. If battery voltage exists, go to next step. If battery voltage does not exist, check for open in Black/Yellow wire between ICM and IGN COIL fuse No. 9 (15-amp) located in underdash fuse/relay box. See WIRING DIAGRAMS article.
2. Ensure ignition is on. Check for voltage between ground and Blue 2 wire (Hitachi) or White/Blue wire (TEC). (Scheme 6)or (Scheme 7). If battery voltage exists, go to next step. If battery voltage does not exist, check ignition coil operation. See «INTERNAL IGNITION COIL RESISTANCE TEST (ACCORD 2.3L, CIVIC & CR-V)»(ref-3102-S10214844852000041700000). If ignition coil is okay, check Blue 2 wire (Hitachi) or White/Blue wire (TEC) between ignition coil and ICM.
3. Turn ignition switch off. On all models except D16Y5 engine with M/T, disconnect PCM 25-pin connector "B". On D16Y5 engine with M/T, disconnect PCM 32-pin connector "A". On all models, check for continuity in Yellow/Green wire between ICM and PCM 25-pin connector "B" terminal No. 13 (except D16Y5 engine with M/T) or PCM 32-pin connector "A" terminal No. 20 (D16Y5 engine with M/T). If continuity exists, go to next step. If continuity does not exist, repair open in Yellow/Green wire.
4. Check for continuity between ground and Yellow/Green wire. If continuity does not exist, go to next step. If continuity exists, check for short to ground in Yellow/Green wire.
5. Check for continuity in Blue 1 wire between ICM and 2-pin, Natural tachometer test connector. Tachometer test connector is located at left rear corner of engine compartment, behind strut tower. If continuity exists, go to next step. If continuity does not exist, check for open in Blue 1 wire.
6. Check for continuity between ground and Blue 1 wire. If continuity exists, check for short to ground in Blue 1 wire. If continuity does not exist, wiring is okay at this time. Replace ICM.

Ignition Control Module (ICM) Input Test (CR-V)

1. Turn ignition off. Remove distributor cap, rotor and leak cover. Disconnect wires from ICM. (Scheme 8) Turn ignition on. Check for voltage between ground and Black/Yellow wire. If battery voltage exists, go to next step. If battery voltage does not exist, check for open in Black/Yellow wire between ignition switch and ICM. See WIRING DIAGRAMS article.
2. Ensure ignition is on. Check for voltage between ground and White/Blue wire. If battery voltage exists, go to next step. If battery voltage does not exist, check ignition coil operation. See «INTERNAL IGNITION COIL RESISTANCE TEST (ACCORD 2.3L, CIVIC & CR-V)»(ref-3102-S10214844852000041700000). Replace ignition coil as necessary. If ignition coil is okay, check for open in White/Blue wire between ICM and ignition coil.
3. Disconnect PCM 25-pin connector "B". Check for continuity in Yellow/Green wire between ICM and PCM 25-pin harness connector "B" terminal No. 13. If continuity exists, go to next step. If continuity does not exist, repair open in Yellow/Green wire.
4. Check for continuity between ground and PCM 25-pin harness connector "B" terminal No. 13 (Yellow/Green wire). If continuity exists, check for short to ground in Yellow/Green wire. If continuity does not exist and wiring is okay at this time, replace ICM.

Ignition Control Module (ICM) Input Test (Prelude)

1. Turn ignition off. Remove distributor cap, rotor and leak cover. Disconnect wires from ICM. (Scheme 9) Turn ignition on. Check for voltage between ground and Black/Yellow wire. If battery voltage exists, go to next step. If battery voltage does not exist, check for open in Black/Yellow wire between ignition switch and ICM. See WIRING DIAGRAMS article.
2. Ensure ignition is on. Check for voltage between ground and Green wire. (Scheme 9) If battery voltage exists, go to next step. If battery voltage does not exist, check ignition coil operation. See «EXTERNAL IGNITION COIL RESISTANCE TEST (PRELUDE)»(ref-3102-S00403743992000041700000). Replace ignition coil as necessary. If ignition coil is okay, check for open in Green wire between ICM and ignition coil.
3. Turn ignition switch off. Disconnect PCM 32-pin connector "A". Check for continuity in Yellow/Green wire between PCM 32-pin harness connector "A" terminal No. 20 and ICM. If continuity exists, go to next step. If continuity does not exist, repair open in Yellow/Green wire.
4. Check for continuity between ground and Yellow/Green wire. If continuity does not exist, go to next step. If continuity exists, check for short to ground in Yellow/Green wire.
5. Reconnect PCM 32-pin connector "A". Disconnect instrument cluster 16-pin connector. Check for continuity in Blue wire between ICM and tachometer. If continuity exists, go to next step. If continuity does not exist, repair open in Blue wire.
6. Check for continuity between ground and Blue wire. If continuity exists, check for short to ground in Blue wire. If continuity does not exist, wiring is okay at this time. Replace ICM.

Scheme 4

Scheme 5

Scheme 6

Scheme 7

Scheme 8

Scheme 9