Fig. 47: Measuring Resistance Between Test Points 1 And 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is resistance less than 24 kohms?
YES : REPLACE THE HVAC CONTROL UNIT .
NO : TEST THE EVAPORATOR TEMPERATURE SENSOR .
A/C SIGNAL CIRCUIT TROUBLESHOOTING IDLE CONTROL SYSTEM
Fig. 48: A/C Signal Circuit Troubleshooting Flow Chart
Courtesy of AMERICAN HONDA MOTOR CO., INC.
1. A/C compressor clutch condition check:
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1. Start the engine, and let it idle.
2. Turn the blower switch on.
3. Turn the A/C switch on.
4. Check the parameter(s) below with the HDS.
Threshold Current conditions
Signal
Values Unit Values
Unit
A/C CLUTCH ON
Do the current condition(s) match the threshold?
YES : Go to step 2.
NO : Do the A/C System Test
2. A/C system check:
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1. Check the A/C system.
Does the A/C system operate?
YES : The A/C system circuit is OK.
NO : Go to step 3.
3. A/C compressor clutch circuit check:
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1. Turn the ignition switch to LOCK (0).
2. Turn the ignition switch to ON (II).
3. Activate the A/C CLUTCH in the INSPECTION MENU with the HDS.
Is there a clicking noise from the A/C compressor clutch?
YES : The A/C compressor clutch circuit is OK. Do the A/C System Test .
NO : Go to step 4.
4. Open wire check (A/C MG CLUTCH RLY CL- line):
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1. Turn the ignition switch to LOCK (0).
2. Jump the SCS line with the HDS.
3. Disconnect the following connector.
PCM connector A (49P)
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4. Turn the ignition switch to ON (II).
5. Connect terminals A and B with a jumper wire.
Terminal A PCM connector A (49P) No. 12 (GRN)
Terminal B Body ground
Fig. 49: Connecting Terminals A And B With Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there a clicking noise from the A/C compressor clutch?
YES : The A/C MG CLUTCH RLY CL- wire is OK. Update the PCM See PCM REMOVAL AND
INSTALLATION or PCM UPDATE if it does not have the latest software, or substitute a known-
good PCM See PCM REMOVAL AND INSTALLATION or PCM UPDATE , 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 or PCM UPDATE .
NO : Check for poor connections or loose terminals at the A/C compressor clutch relay and the PCM. If
the connections and terminals are OK, check the A/C compressor clutch relay. If needed, repair open in
the A/C MG CLUTCH RLY CL- wire between the PCM (A12) and the A/C compressor clutch relay, or
other parts in the A/C systems.
AIR MIX CONTROL MOTOR TEST
SPECIAL TOOL DESCRIPTION
Image
Description/Tool Number
Backprobe Set 07SAZ-001000A (2)
TEST
NOTE:
Before testing the motor, check for HVAC DTCs.
1. Air Mix Control Motor - Test
1. Disconnect the air mix control motor connector.
NOTE:
Incorrectly applying power and ground to the air mix control motor
will damage it. Follow the instructions carefully.
2024 Honda CR-V Owner's Manual
2023 Honda CR-V Owner's Manual
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