Fuel & Emission System Troubleshooting & Testing: Diagnosis Honda CR-V IV

If you can't duplicate the DTC

Some of the troubleshooting requires you to reset the PCM and try to duplicate the DTC. If the problem is intermittent and you can't duplicate the DTC, do not continue through the procedure. To do so will only result in confusion and possibly, a needlessly replaced PCM.

Scan Tool Clear Command

If you are using a generic scan tool to clear commands, be aware that there is only one setting for clearing the PCM, and it clears all commands at the same time (CKP pattern learn, idle learn, readiness codes, freeze data, on-board snapshot, and DTCs). After you clear all commands, you then need to do these procedures, in this order: PCM idle learn procedure; CKP pattern learn procedure.

DTC Clear

1. Clear the DTC with the HDS while the engine is stopped.
2. Turn the ignition switch to LOCK (0).
3. Turn the ignition switch to ON (II), and wait 30 seconds.
4. Turn the ignition switch to LOCK (0), and disconnect the HDS from the DLC.

How to End a Troubleshooting Session (required after any troubleshooting)

1. Reset the PCM with the HDS.
2. «DO THE PCM IDLE LEARN PROCEDURE»(ref-595375-S25100108042014013100000) .
3. Turn the ignition switch to LOCK (0).
4. Disconnect the HDS from the DLC.

Note. The PCM is part of the immobilizer system. If you replace the PCM, you must use the HDS to instruct the new PCM and the immobilizer- keyless control unit to recognize each other's unique serial code.

How to Troubleshoot Circuits at the PCM Connectors

Note. The PCM stays on for about an hour after the ignition switch is turned to LOCK (0). Jumping the SCS line after turning the ignition switch to LOCK (0) cancels this function. Disconnecting the PCM during this function, without jumping the SCS line first, can damage the PCM.

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1. Jump the SCS line with the HDS.
2. Remove the cover (A).
3. Disconnect PCM connectors A, B, and C. NOTE: PCM connectors A, B, and C have symbols (A=•, B=delta, C=o) embossed on them for identification.
4. When diagnosis/troubleshooting is done at the PCM connectors, use the terminal test port (A) above the terminal you need to check.
5. Connect one side of the patch cord terminals (A) to a commercially available digital multimeter (B), and connect the other side of the terminal (C) to a commercially available banana jack (Pomona Electronics Tool No. 3563 or equivalent) (D).
6. Gently contact the pin probe (male) at the terminal test port from the terminal side. Do not force the tips into the terminals. NOTE: For accurate results, always use the pin probe (male). To prevent damage to the connector terminals, do not insert test equipment probes, paper clips, or other substitutes as they can damage the terminals. Damaged terminals cause a poor connection and an incorrect measurement. Do not puncture the insulation on a wire. Punctures can cause or eventually lead to poor or intermittent electrical connections.

Symptom troubleshooting Index

When the vehicle has one of these symptoms, check for a diagnostic trouble code (DTC) with the HDS. If there is no DTC, do the diagnostic procedure for the symptom, in the sequence listed, until you find the cause.

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DLC Circuit Troubleshooting

Note. If you suspect the HDS or the HDS DLC cable may be the source of the communication problem, verify that they are working properly by connecting them to a known-good, like vehicle and system, and checking for communication problems.

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1. HDS communication check: 1. Turn the ignition switch to LOCK (0). 2. Connect the HDS to the DLC. NOTE: Make sure the HDS is properly connected to the DLC. 3. Turn the ignition switch to ON (II), and turn on the HDS. Does the HDS identify the vehicle? YES : Go to step 2. NO : Go to step 12 .
2. Determine possible failure area (PGM-FI system, other systems): 1. Check for Pending or Confirmed DTCs in the PGM-FI system with the HDS. DTC Description Confirmed DTC Pending DTC Freeze Frame Are any Pending or Confirmed DTCs indicated? YES : Go to the indicated DTC's troubleshooting. NO : If the HDS does not communicate with the SRS, go to step 3. NO : If the HDS does not communicate with the VSA system, go to step 4 . NO : If the HDS does not communicate with the TPMS, go to step 5 . NO : If the HDS does not communicate with the EPS system, go to step 6 . NO : If the HDS does not communicate with the IMMOBI (immobilizer) system, go to step 7 . NO : If the HDS does not communicate with the BODY ELECTRICAL system, go to step 8 .
3. SRS check: 1. Turn the ignition switch to LOCK (0). 2. Turn the ignition switch to ON (II), and watch the SRS indicator. Does the SRS indicator come on and go off? YES : The SRS is OK. Go to step 9 . NO : Go to the symptom troubleshooting for «SRS indicator stays on, but no DTCs are stored, or cannot be read»(ref-595388-S08406610462014013100000)
4. VSA system check: 1. Turn the ignition switch to LOCK (0). 2. Turn the ignition switch to ON (II), and watch the VSA indicator. Does the VSA indicator come on and go off? YES : The VSA system is OK. Go to step 9 . NO : Go to the «SYMPTOM TROUBLESHOOTING FOR ABS INDICATOR, BRAKE SYSTEM INDICATOR, AND VSA INDICATOR DO NOT GO OFF»(ref-595379-S14534515962014013100000) .
5. TPMS check: 1. Turn the ignition switch to LOCK (0). 2. Turn the ignition switch to ON (II), and watch the TPMS indicator. Does the TPMS indicator come on and go off? YES : The TPMS is OK. Go to step 9 . NO : Go to the symptom troubleshooting for «TPMS indicator does not go off, and no DTCs are stored»(ref-595446-S32076388552014013100000)
6. EPS system check: 1. Turn the ignition switch to LOCK (0). 2. Start the engine, and watch the EPS indicator. Does the EPS indicator come on and go off? YES : The EPS system is OK. Go to step 9 . NO : Go to the «EPS SYMPTOM TROUBLESHOOTING FOR EPS INDICATOR DOES NOT GO OFF, AND NO DTCS ARE STORED»(ref-595418-S39485234522014013100000) .
7. Immobilizer system check: 1. Turn the ignition switch to LOCK (0). 2. Turn the ignition switch to ON (II), and watch the immobilizer indicator. Does the immobilizer indicator stay on or flash? YES : «GO TO THE IMMOBILIZER SYSTEM TROUBLESHOOTING»(ref-595436-S42626068832014013100000) . NO : The immobilizer system is OK. Go to step 9 .
8. Body electrical system check: 1. «DO THE GAUGE SELF-DIAGNOSTIC FUNCTION»(ref-595382-S25748196052014013100000) . 2. Check the gauge display. Is Error 2 or Error 12 indicated? YES : «GO TO THE BODY ELECTRICAL SYSTEM DTC'S TROUBLESHOOTING»(ref-595406-S20099846262014013100000) . NO : The body electrical system is OK. Go to step 9.
9. Determine possible failure area (K LINE, others): 1. Turn the ignition switch to LOCK (0). 2. Disconnect the HDS from the DLC. 3. Check for continuity between test points 1 and 2. Test condition IG LOCK (0) Test circuit K LINE Test point 1 DLC (16P) No. 7 (LT BLU) Test point 2 Body ground Is there continuity? YES : Go to step 10. NO : Go to step 11 .
10. Shorted wire check (K LINE): 1. Continue to check for continuity between DLC terminal No. 7 and body ground, while disconnecting these parts, one at a time: SRS unit connector A (39P) VSA modulator-control unit 38P connector TPMS control unit 20P connector EPS control unit connector A (11P) Immobilizer-keyless control unit 7P connector Audio unit (audio-navigation unit) connector A (24P) Under-dash fuse/relay box connector Q (16P) Does continuity go away when one of the above components is disconnected? YES : Replace the part that caused an open when it was disconnected. NO : Repair a short in the K LINE wire between the DLC terminal No. 7 and the SRS unit, the VSA modulator-control unit, the TPMS control unit, the EPS control unit, the immobilizer-keyless control unit, the audio unit, the audio-navigation unit, or the driver's under-dash fuse/relay box.
11. Open wire check (K LINE): 1. Connect terminals A and B with a jumper wire. Terminal A DLC (16P) No. (LT BLU) Terminal B Body ground 2. Check for continuity between body ground and these connector terminals: Connector Terminal SRS unit connector A (39P) No. 19 (LT BLU) VSA modulator-control unit 38P connector No. 11 (LT BLU) TPMS control unit 20P connector No. 4 (LT BLU) EPS control unit connector A (11P) No. 5 (LT BLU) Immobilizer-keyless control unit 7P connector No. 3 (LT BLU) Audio unit (audio-navigation unit) connector A (24P) No. 13 (LT BLU) Under-dash fuse/relay box connector Q (16P) No. 14 (LT BLU) Is there continuity between the body ground and each of the terminals in the chart? YES : The K LINE wire is OK. Replace the control unit that does not communicate with the HDS. NO : Repair an open in the K LINE wire between the DLC and the appropriate control unit connector.
12. Body electrical system (B-CAN) check: 1. «DO THE GAUGE SELF-DIAGNOSTIC FUNCTION»(ref-595382-S25748196052014013100000) . 2. Check for gauge control module DTCs without the HDS. Is DTC U0029 and/or U0100 indicated? YES : «DO THE PCM POWER AND GROUND CIRCUIT TROUBLESHOOTING»(ref-595375-S33779110012014013100000) . NO : Go to step 13.
13. Open wire check (+B BACK UP line): 1. Turn the ignition switch to LOCK (0). 2. Disconnect the HDS from the DLC. 3. Measure the voltage between test points 1 and 2. Test condition IG LOCK (0) Test circuit +B BACK UP Test point 1 DLC (16P) No. 16 (WHT) Terminal B Body ground YES : The +B BACK UP wire is OK. Go to step 14. NO : Repair an open in the +B BACK UP wire between DLC terminal No. 16 and the No. A29 (10 A) fuse in the under-hood fuse/relay box.
14. Open wire check (GND line): 1. Measure the voltage between test points 1 and 2. Test condition IG LOCK (0) Test circuit GND, +B BACK UP Test point 1 DLC (16P) No. 4 (BLK) Terminal B DLC (16P) No. 16 (WHT) Is there battery voltage? YES : The GND wire is OK. Go to step 15. NO : Repair an open in the GND wire between DLC terminal No. 4 and G502.
15. Open wire check (F CAN-H line): 1. Connect the HDS to the DLC. 2. Jump the SCS line with the HDS. 3. Disconnect the following connector. PCM connector A (49P) 4. Disconnect the HDS from the DLC. 5. Check for continuity between test points 1 and 2. Test condition IG LOCK (0) PCM connector A (49P): disconnected Test circuit F CAN-H Test point 1 PCM connector A (49P) No. 3 (WHT) Test point 2 DLC (16P) No. 6 (WHT) Is there continuity? YES : The F CAN-H wire is OK. Go to step 16. NO : Repair an open in the F CAN-H wire between the PCM (A3) and DLC terminal No. 6.
16. Open wire check (F CAN-L line): 1. Check for continuity between test points 1 and 2. Test condition IG LOCK (0) PCM connector A (49P): disconnected Test circuit F CAN-L Test point 1 PCM connector A (49P) No. 4 (RED) Test point 2 DLC (16P) No. 14 (RED) Is there continuity? YES : The F CAN-L wire is OK. Update the PCM See «PCM REMOVAL AND INSTALLATION»(ref-595374-S31779448642014013100000) or «PCM UPDATE»(ref-595375-S42937672232014013100000) if it does not have the latest software, or substitute a known-good PCM See «PCM REMOVAL AND INSTALLATION»(ref-595374-S31779448642014013100000) or «PCM UPDATE»(ref-595375-S42937672232014013100000) , then recheck. If the symptom/indication goes away and the PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the PCM was substituted, replace the original PCM See «PCM REMOVAL AND INSTALLATION»(ref-595374-S31779448642014013100000) or «PCM UPDATE»(ref-595375-S42937672232014013100000) . NO : Repair an open in the F CAN-L wire between the PCM (A4) and the DLC terminal No. 14.

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1. HDS DLC - Connection Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard. Turn the ignition switch to ON (II). Make sure the HDS communicates with the vehicle. If it does not communicate, go to the DLC circuit troubleshooting.
2. CKP Pattern - Clear/Learn Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard. Turn the ignition switch to ON (II). Make sure the HDS communicates with the vehicle. If it does not communicate, go to the DLC circuit troubleshooting. Select CRANK PATTERN in the ADJUSTMENT MENU with the HDS. Select CRANK PATTERN CLEAR, and clear the CKP pattern. Select CRANK PATTERN LEARNING with the HDS, and follow the screen prompts. After learning, turn the ignition switch to LOCK (0). Disconnect the HDS from the DLC.

Fuel and Emissions Systems Diagnostic Interview - Engine stalls

ENGINE STALLS-DIAGNOSTIC INTERVIEW

ENGINE STALLS CONDITION-POSSIBLE CAUSE PATTERN CHART FROM DIAGNOSTIC INTERVIEW

Fuel and Emissions Systems Diagnostic Interview - Engine will not start, engine starts but stalls immediately, or engine is hard to start

HARD TO START ENGINE-DIAGNOSTIC INTERVIEW

HARD-TO START CONDITION-POSSIBLE CAUSE PATTERN CHART FROM DIAGNOSTIC INTERVIEW

Fuel and Emissions Systems DTC Troubleshooting Index

DTC TROUBLESHOOTING INDEX

Note. The above DTCs are indicated when the PGM-FI system is selected with the HDS.

*: These DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS. Some DTCs do not cause the MIL to blink when the SCS line is jumped; these DTCs are shown in the gauge display.

*1: With real time AWD

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See also:
• THROTTLE BODY CLEANING
• P0010 (56)
• DO THE TROUBLESHOOTING PROCEDURE FOR DTC P0335
• GO TO THE F-CAN CIRCUIT TROUBLESHOOTING