There is a lot in the Accord Honda workshop manual (ESM) about checking glowplug function. I would ***ume there'd be some similarity with the CR-V.
Apologies, but my copy/paste has missed off the schematics. Unfortunately the numbering has also become reset to 1 in many places (maybe find your own manual somewhere?)...
Turn the ignition switch ON (II).
Do the gauge self-diagnostic procedure.
Does the glow plug indicator flash?
YES -
Go to Step 3 .
NO -
Substitute a known-good gauge ***embly, and recheck. If the glow plug indicator circuit is OK, replace the original gauge ***embly.■
Turn the ignition switch OFF.
Turn the ignition switch ON (II), and watch the glow plug indicator.
Does the glow plug indicator stay off?
YES -
Go to Step 7 .
NO -
Go to Step 5 .
Turn the ignition switch OFF.
Turn the ignition switch ON (II), and watch the glow plug indicator.
Does the glow plug indicator stay on?
YES -
Go to Step 12 .
NO -
The glow plug indicator circuit is OK.■
Try to start the engine.
Does the engine start?
YES -
Go to Step 8 .
NO -
Go to Step 16 .
Turn the ignition switch OFF, and wait 30 seconds.
Disconnect the gauge ***embly 30P connector.
Disconnect ECM connector No. 2 (58P).
Check for continuity between ECM connector No. 2 terminal No. 33 and gauge ***embly 30P connector terminal No. 10.
Is there continuity?
YES -
Update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM. ■
NO -
Repair open in the wire between the gauge ***embly and ECM connector No. 2 terminal No. 33.■
Turn the ignition switch OFF, and wait 30 seconds.
Disconnect the gauge ***embly 30P connector.
Disconnect ECM connector No. 2 (58P).
Check for continuity between ECM connector No. 2 terminal No. 33 and body ground.
Is there continuity?
YES -
Repair short in the wire between the gauge ***embly and ECM connector No. 2 terminal No. 33.■
NO -
Update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM. ■
Press the inertia switch button.
Try to start the engine.
Does the engine start?
YES -
Troubleshooting is complete.■
NO -
Go to Step 18 .
Check PGM-FI main relay 1.
Is PGM-FI main relay 1 OK?
YES -
Go to Step 19 .
NO -
Replace PGM-FI main relay 1.■
Inspect No. 8 FI ECU (ECM) (20 A) fuse in the under-hood fuse/relay box.
Is the fuse OK?
YES -
Go to Step 26 .
NO -
Go to Step 20 .
Disconnect PGM-FI main relay 1.
Check for continuity between body ground and PGM-FI main relay 1 4P connector terminals No. 1 and No. 4 individually.
Is there continuity?
YES -
Repair short in the wire between PGM-FI main relay 1 and No. 8 FI ECU (ECM) (20 A) fuse. Also replace No. 8 FI ECU (ECM) (20 A) fuse.■
NO -
Go to Step 22 .
Turn the ignition switch OFF, and wait 30 seconds.
Disconnect ECM connector No. 2 (58P).
Disconnect the fuel rail pressure control valve 2P connector.
Check for continuity between PGM-FI main relay 1 4P connector terminal No. 2 and body ground.
Is there continuity?
YES -
Repair short in the wire between PGM-FI main relay 1, fuel rail pressure control valve and ECM connector No. 2 terminal No. 1, No. 3 or No. 5. Also replace No. 8 FI ECU (ECM) (20 A) fuse.■
NO -
Update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM. ■
Turn the ignition switch OFF.
Disconnect PGM-FI main relay 1.
Measure voltage between body ground and PGM-FI main relay 1 4P connector terminals No. 1 and No. 4 individually.
Is there battery voltage?
YES -
Go to Step 29 .
NO -
Repair open in the wire between PGM-FI main relay 1 and No. 8 FI ECU (ECM) (20 A) fuse.■
Disconnect ECM connector No. 2 (58P).
Connect PGM-FI main relay 1 4P connector terminal No. 3 to body ground with a jumper wire.
Check for continuity between ECM connector No. 2 terminal No. 19 and body ground.
Is there continuity?
YES -
Go to Step 35 .
NO -
Go to Step 32 .
Disconnect the inertia switch 3P connector.
Connect inertia switch 3P connector terminals No. 1 and No. 3 with a jumper wire.
Check for continuity between ECM connector No. 2 terminal No. 19 and body ground.
Is there continuity?
YES -
Replace the inertia switch .■
NO -
Repair open in the wire between PGM-FI main relay 1 and ECM connector No. 2 terminal No. 19.■
Measure voltage between ECM connector No. 2 terminal No. 35 and body ground.
Is there battery voltage?
YES -
Go to Step 37 .
NO -
Go to Step 36 .
Inspect No. 18 IG ACG (15 A) fuse in the under-dash fuse/relay box.
Is the fuse OK?
YES -
Repair open in the wire between No. 18 IG ACG (15 A) fuse and ECM connector No. 2 terminal No. 1.■
NO -
Repair short in the wire between No. 18 IG ACG (15 A) fuse and ECM connector No. 2 terminal No. 1.■
Check for continuity between PGM-FI main relay 1 4P connector terminal No. 2 and ECM connector No. 2 terminals No. 1, No. 3, and No. 5 individually.
Is there continuity?
YES -
Go to Step 38 .
NO -
Repair open in the wire between PGM-FI main relay 1 and ECM connector No. 2 terminal No. 1, No. 3 or No. 5.■
Check for continuity between body ground and ECM connector No. 2 terminals No. 2, No. 4, and No. 6 individually.
Is there continuity?
YES -
Update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM. ■
NO -
Repair open in the wire between PGM-FI main relay 1 and ECM connector No. 2 terminal No. 1, No. 3 or No. 5.■