HVAC - Diagnostics: Wiring Toyota Sequoia I

Wiring Diagram

For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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1. Check Voltage Between Terminals FRTR And SG-3 Of Integration Control And Panel Connector Preparation: Remove integration control and panel with connectors still connected. Check: Turn ignition switch to ON. NOTE: As the temperature increases, the voltage decreases. Measure voltage between terminals FRTR and SG-3 of integration control and panel connector at each temperature. OK: Voltage: at 25°C (77°F): 1.8 - 2.2 V at 40°C (104°F): 1.2 - 1.6 V NG: Go to Step 3 . OK: Proceed to next circuit inspection shown on problem symptoms table. See «PROBLEM SYMPTOMS TABLE»(ref-170283-S41163716992005012600000) . However, if DTC 11 is displayed, check and replace integration control and panel.
2. Check Front Room Temperature Sensor Preparation: Disconnect room temperature sensor connector. Check: Measure resistance between terminals 1 and 2 of room temperature sensor connector at each temperature. OK: Resistance: at 25°C (77°F): 1.65 - 1.75 kohm . at 50°C (122°F): 0.55 - 0.65 kohm . NG: Replace front room temperature sensor. OK: Go to next step.
3. Check Harness And Connector Between Integration Control And Panel And Front Room Temperature Sensor NG: Repair or replace harness or connector. OK: Check and replace integration control and panel.

For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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1. Check Voltage Between Terminals TAM And SG-1 Of Integration Control And Panel Preparation: Remove integration control and panel with connectors still connected. Check: Turn ignition switch to ON. NOTE: As the temperature increases, the voltage decreases. Measure voltage between terminals TAM and SG-1 of integration control and panel connector at each temperature. OK: Voltage: at 25°C (77°F): 1.35 - 1.75 V at 40°C (104°F): 0.85 - 1.25 V NG: Go to step 2. OK: Proceed to next circuit inspection shown on problem symptoms table. See «PROBLEM SYMPTOMS TABLE»(ref-170283-S41163716992005012600000) . However, if DTC 12 is displayed, check and replace integration control and panel.
2. Check Ambient Temperature Sensor Preparation: Disconnect ambient temperature sensor connector. Check: Measure resistance between terminals 1 and 2 of ambient temperature sensor connector at each temperature. OK: Resistance: at 25°C (77°F): 1.6 - 1.8 kohm at 50°C (122°F): 0.5 - 0.7 kohm NG: Replace ambient temperature sensor. OK: Go to next step.
3. Check Harness And Connector Between Ambient Temperature Sensor And Integration Control And Panel NG: Repair or replace harness or connector. OK: Check and replace and integration control and panel.

For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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1. Check Voltage Between Terminals TE And SG-2 Of Integration Control And Panel Connector Preparation: Remove integration control and panel with connectors still connected. Check: Turn ignition switch to ON. NOTE: As the temperature increases, the voltage decreases. Measure voltage between terminals TE and SG-2 of integration control and panel connector at each temperature. OK: Voltage: at 0°C (32°F): 2.0 - 2.4 V . at 15°C (59°F): 1.4 - 1.8 V . NG: Go to step 2. OK: Proceed to next circuit inspection shown on problem symptoms table. See «PROBLEM SYMPTOMS TABLE»(ref-170283-S41163716992005012600000) . However, if DTC 13 is displayed, check and replace integration control and panel.
2. Check Front Evaporator Temperature Sensor Preparation: Remove front evaporator temperature sensor. Check: Measure resistance between terminals 1 and 2 of evaporator temperature sensor connector at each temperature. OK: Resistance: at 0°C (32°F): 4.5 - 5.2 kohm . at 15°C (59°F): 2.0 - 2.7 kohm . NG: Replace front evaporator temperature sensor. OK: Go to next step.
3. Check Harness And Connector Between Integration Control And Panel And Front Evaporator Temperature Sensor . NG: Repair or replace harness or connector. OK: Check and replace integration control and panel.

For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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1. Check Voltage Between Terminals TEC And SG Of Integration Control And Panel Connector Preparation: Remove integration control and panel with connectors still connected. Check: Turn ignition switch to ON. NOTE: As the temperature increases, the voltage decreases. Measure voltage between terminals TEC and SG of integration control and panel connector at each temperature. OK: Voltage: at 0°C (32°F): 2.0 - 2.4 V . at 15°C (59°F): 1.4 - 1.8 V . NG: Go to step 2. OK: Proceed to next circuit inspection shown on problem symptoms table. See «PROBLEM SYMPTOMS TABLE»(ref-170283-S41163716992005012600000) . However, if DTC 17 is displayed, check and replace integration control and panel.
2. Check Rear Evaporator Temperature Sensor Preparation: Remove «REAR A/C EVAPORATOR»(ref-169995-S00183975622004122200000) . Check: Measure resistance between terminals 1 and 2 of evaporator temperature sensor connector at each temperature. OK: Resistance: at 0°C (32°F): 4.5 - 5.2 kohm . at 15°C (59°F): 2.0 - 2.7 kohm . NG: Replace rear evaporator temperature sensor. OK: Go to next step.
3. Check Harness And Connector Between Integration Control And Panel And Rear Evaporator Temperature Sensor NG: Repair or replace harness or connector. OK: Check and replace integration control and panel.

For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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1. Check Voltage Between Terminals TR And SG-5 Of Integration Control And Panel Connector Preparation: Remove integration control and panel with connectors still connected. Check: Turn ignition switch to ON. NOTE: As the temperature increases, the voltage decreases. Measure voltage between terminals TR and SG-5 of integration control and panel connector at each temperature. OK: Voltage: at 25°C (77°F): 1.8 - 2.2 V . at 40°C (104°F): 1.2 - 1.6 V . NG: Go to step 3 . OK: Proceed to next circuit inspection shown on problem symptoms table. See «PROBLEM SYMPTOMS TABLE»(ref-170283-S41163716992005012600000) . However, if DTC19 is displayed, check and replace integration control and panel.
2. Check Rear Room Temperature Sensor Preparation: Disconnect rear room temperature sensor connector. Check: Measure resistance between terminals 1 and 2 of room temperature sensor connector at each temperature. OK: Resistance: at 25°C (77°F): 1.65 - 1.75 kohm . at 50°C (122°F): 0.55 - 0.65 kohm . NG: Replace rear room temperature sensor. OK: Go to next step.
3. Check Harness And Connector Between Integration Control And Panel And Rear Room Temperature Sensor . NG: Repair or replace harness or connector. OK: Check and replace integration control and panel.

For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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1. Check Voltage Between Terminals TS And S5-3 Of Integration Control And Panel Connector Preparation: Remove integration control and panel with connectors still connected. Check: Turn ignition switch to ON. NOTE: As the inspection light is moved away from the sensor, the voltage increases. Measure voltage between terminals TS and S5-3 of integration control and panel connector when the solar sensor is subjected to an electric light, and when the sensor is covered by a cloth. OK: NG: Go to step 2. OK: Proceed to next circuit inspection shown on problem symptoms table. See «PROBLEM SYMPTOMS TABLE»(ref-170283-S41163716992005012600000) . However, if DTC 21 is displayed, check and replace integration control and panel.
2. Check Solar Sensor Preparation: Remove solar sensor. Check: Cover the sensor with a cloth. NOTE: Connect positive (+) lead of ohmmeter to terminal 1 and negative (-) lead to terminal 2 of the solar sensor. Measure resistance between terminals 1 and 2 of solar sensor connector. OK: Resistance: oo (infinity) ohm (no continuity) . Preparation: Remove the cloth from the solar sensor and subject the sensor to electric light. NOTE: As the electric light is moved away from the sensor, the resistance increases. Measure resistance. OK: Resistance: Approx. 4 kohm (continuity) . NG: Replace solar sensor. OK: Go to next step.
3. Check Harness And Connector Between Integration Control And Panel And Solar Sensor NG: Repair or replace harness or connector. OK: Check and replace integration control and panel.

For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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1. Check Compressor Preparation: Check compressor drive belt tension. «ON-VEHICLE INSPECTION»(ref-169995-S40473783902004122200000) Check if the compressor does not lock during operation with engine started and blower switch and A/C switch ON. NG: Adjust drive belt tension or repair compressor. OK: Go to next step.
2. Check Compressor Lock Sensor Preparation: Disconnect compressor connector. Check: Measure resistance between terminals 1 and 2 of compressor lock sensor connector. OK: Resistance: 65 - 125 ohm at 20°C (68 °F) . Reference: Inspection using oscilloscope . NOTE: The correct waveform appears as shown in the illustration on the left. During cranking or idling, measure voltage between terminals LOCK and SG-1 of integration control and panel. NG: Replace compressor. OK: Go to next step.
3. Check Harness And Connector Between Integration Control And Panel And Compressor Lock Sensor NG: Repair or replace harness or connector. OK: Proceed to next circuit inspection shown on problem symptoms table. See «PROBLEM SYMPTOMS TABLE»(ref-170283-S41163716992005012600000) . However, if DTC 22 is displayed, check and replace integration control and panel.

For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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1. Check Voltage Between Terminal PSW And GND Of Integration Control And Panel Preparation: Install the manifold gauge set. Remove the center cluster integration panel with connectors still connected. Check: Turn ignition switch to ON. Check voltage between terminals PRE and GND of integration control and panel connector when A/C refrigerant pressure is changed. OK: The voltage changes with refrigerant pressure, as shown in the diagram below. NG: Go to step 2. OK: Proceed to next circuit inspection shown on problem symptoms table. See «PROBLEM SYMPTOMS TABLE»(ref-170283-S41163716992005012600000) . However, if DTC 23 is displayed, check and replace integration control and panel.
2. Check Pressure Switch Preparation: Disconnect pressure switch connector. Check: Turn ignition switch ON. Check continuity between terminals 1 and 2 of pressure switch when A/C refrigerant pressure is changed. OK: The continuity changes with refrigerant pressure as shown below. NG: Replace pressure switch. OK: Go to next step.
3. Check Harness And Connector Between Integration Control And Panel And Pressure Switch NG: Repair or replace harness or connector. OK: Check and replace integration control and panel.

For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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1. Check Voltage Between Terminals TPD And SG Of Integration Control And Panel Connector Preparation: Remove integration control and panel with connectors still connected. Check: Turn ignition switch to ON. NOTE: As the temperature increases, the voltage decreases. Change the set temperature to activate the front air mix damper control servomotor, and measure the voltage between terminals TPD and SG of integration control and panel connector each time when the set temperature is changed. OK: HINT: As the set temperature increases, the voltage decreases. NG: Go to step 2. OK: Proceed to next circuit inspection shown on problem symptoms table. See «PROBLEM SYMPTOMS TABLE»(ref-170283-S41163716992005012600000) . However, if DTC 31 is displayed, check and replace integration control and panel.
2. Check Front Air Mix Damper Position Sensor Preparation: Remove «AIR MIX SERVOMOTOR»(ref-169995-S35683218962004122200000) . Check: Measure resistance between terminals 3 and 4 of front air mix damper control servomotor assembly connector. OK: Resistance: 4.2 - 7.8 kohm . Check: While operating front air mix damper control servomotor, following the procedure, measure resistance between terminals 3 and 4 of front air mix damper control servomotor assembly connector. OK: HINT: NG: Replace front air mix damper control servomotor assembly. OK: Go to next step.
3. Check Harness And Connector Between Integration Control And Panel And Front Air Mix Damper Control Servomotor Assembly . NG: Repair or replace harness or connector. OK: Check and replace integration control and panel.

For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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1. Check Voltage Between Terminals TPI And SG-4 Of Integration Control And Panel Connector Preparation: Remove integration control and panel with connectors still connected. Check: Turn ignition switch to ON. Press REC/FRS switch to change air inlet between fresh and recirculation air, and measure voltage between terminals TPI and SG-4 of integration control and panel when the air inlet damper control servomotor operates. OK: HINT: As the air inlet damper control servomotor is moved form REC side to FRS side, the voltage decreases. NG: Go to step 2. OK: Proceed to next circuit inspection shown on problem symptoms table. See «PROBLEM SYMPTOMS TABLE»(ref-170283-S41163716992005012600000) . However, if DTC 32 or 42 is displayed, check and replace integration control and panel.
2. Check Air Inlet Damper Position Sensor Preparation: Remove «AIR MIX SERVOMOTOR»(ref-169995-S35683218962004122200000) . Check: Measure resistance between terminals 3 and 2 of air inlet damper control servomotor assembly connector. OK: Resistance: 4.2 - 7.8 kohm . Check: While operating air inlet damper control servomotor, following this procedure, see «DTC 42 AIR INLET DAMPER CONTROL SERVOMOTOR CIRCUIT»(ref-170283-S19199924172005012600000) , measure resistance between terminals 3 and 2 of air inlet damper control servomotor assembly connector. OK: Resistance NG: Replace air inlet damper control servomotor assembly. OK: Go to next step.
3. Check Harness And Connectors Between Integration Control And Panel And Air Inlet Damper Control Servomotor Assembly NG: Repair or replace harness or connector. OK: Check and replace integration control and panel.

For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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1. Check Voltage Between Terminals TPH And SG Of Integration Control And Panel Connector Preparation: Remove integration control and panel with connectors still connected. Check: Turn ignition switch to ON. NOTE: As the temperature increases, the voltage decreases. Change the set temperature to activate the rear air mix damper control servomotor, and measure the voltage between terminals TPH and SG of integration control and panel connector each time when the set temperature is changed. OK: NG: Go to step 2. OK: Proceed to next circuit inspection shown on problem symptoms table. See «PROBLEM SYMPTOMS TABLE»(ref-170283-S41163716992005012600000) . However, if DTC 37 or 47 is displayed, check and replace integration control and panel.
2. Check Water Valve Damper Position Sensor Preparation: Remove «REAR A/C EVAPORATOR»(ref-169995-S00183975622004122200000) . Check: Measure resistance between terminals 1 and 2 of water valve damper control servomotor assembly connector. OK: Resistance: 4.2 - 7.8 kohm . Check: While operating water valve damper control servomotor, following the procedure, measure resistance between terminals 2 and 3 of water valve damper control servomotor assembly connector. OK: NG: Replace water valve damper control servomotor assembly. OK: Go to next step.
3. Check Harness And Connector Between Integration Control And Panel And Water Valve Damper Control Servomotor Assembly NG: Repair or replace harness or connector. OK: Check and replace integration control and panel.

For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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1. Check Front Air Mix Damper Control Servomotor Preparation: Remove «AIR MIX SERVOMOTOR»(ref-169995-S35683218962004122200000) . Check: Connect positive (+) lead to terminal 1 and negative (-) lead to terminal 2. OK: The lever turns smoothly to Warm side. Check: Connect positive (+) lead to terminal 2 and negative (-) lead to terminal 1. OK: The lever turns smoothly to Cool side. NG: Replace front air mix damper control servomotor assembly. OK: Go to next step.
2. Check Harness And Connector Between Integration Control And Panel And Front Air Mix Damper Control Servomotor Assembly NG: Repair or replace harness or connector. OK: Check and replace integration control and panel.

For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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1. Check Air Inlet Damper Control Servomotor Preparation: Remove the «AIR MIX SERVOMOTOR»(ref-169995-S35683218962004122200000) . Check: Connect positive (+) lead to terminal 4 and negative (-) lead to terminal 5. OK: The lever moves smoothly to REC position. Check: Connect positive (+) lead to terminal 5 and negative (-) lead to terminal 4. OK: The lever moves smoothly to FRS position. NG: Replace air inlet damper control servomotor assembly. OK: Go to next step.
2. Check Harness And Connector Between Integration Control And Panel And Air Inlet Damper Control Servomotor NG: Repair or replace harness or connector. OK: Check and replace integration control and panel.

For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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1. Check Water Valve Damper Control Servomotor Preparation: Remove the «REAR A/C EVAPORATOR»(ref-169995-S00183975622004122200000) . Check: Connect positive (+) lead to terminal 5 and negative (-) lead to terminal 4. OK: The lever turns smoothly to Warm side. Check: Connect positive (+) lead to terminal 4 and negative (-) lead to terminal 5. OK: The lever turns smoothly to Cool side. NG: Replace water valve damper control servomotor assembly. OK: Go to next step.
2. Check harness and connector between integration control and panel and water valve damper control servomotor assembly. NG: Repair or replace harness or connector. OK: Check and replace integration control and panel.

For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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1. Check Voltage Between Terminals IG And GND Of Integration Control And Panel Connector Preparation: Remove integration control and panel with connectors still connected. Turn ignition switch to ON. Check: Measure voltage between terminals IG and GND of integration control and panel. OK: Voltage: 10 - 14 V . OK: Proceed to next circuit inspection shown on problem symptoms table. See «PROBLEM SYMPTOMS TABLE»(ref-170283-S41163716992005012600000) . NG: Go to next step.
2. Check continuity between terminal GND of integration control and panel and body ground. Preparation: Turn ignition switch to LOCK. Check: Measure resistance between terminal GND of A/C control assembly and body ground. OK: Resistance: Below 1 ohm . NG: Repair or replace harness or connector. OK: Go to next step.
3. Check GAUGE fuse. Preparation: Remove GAUGE fuse from instrument panel J/B. Check: Check continuity of GAUGE fuse. OK: Continuity exists. NG: Check for short in all the harness and components connected to the gauge fuse. OK: Check and repair harness and connector between integration control and panel and battery.

For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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1. Check Voltage Between Terminal B Of Integration Control And Panel Connector And Body Ground Preparation: Remove the integration control and panel with connector still connected. Check: Measure voltage between terminal B of integration control and panel connector and body ground. OK: Voltage: 10 - 14 V . OK: Proceed to next circuit inspection shown on problem symptoms table. See «PROBLEM SYMPTOMS TABLE»(ref-170283-S41163716992005012600000) . NG: Go to next step.
2. Check DOME fuse. Preparation: Remove DOME fuse from engine room J/B. Check: Check continuity of DOME fuse. OK: Continuity NG: Check for short in all the harness and components connected to the CIG fuse (See attached wiring diagram). OK: Check and repair harness and connector between integration control and panel.

For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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1. Check Voltage Between Terminals ACC And GND Of Integration Control And Panel Connector Preparation: Remove integration control and panel with connectors still connected. Check: Turn ignition switch to ACC. Measure voltage between terminals ACC and GND of integration control and panel. OK: Voltage: Battery positive voltage OK: Proceed to next circuit inspection shown on problem symptoms table. See «PROBLEM SYMPTOMS TABLE»(ref-170283-S41163716992005012600000) . NG: Go to next step.
2. Check CIG Fuse Preparation: Remove CIG fuse from cowl side J/B. Check: Check continuity of CIG fuse. OK: Continuity NG: Check for short in all the harness and components connected to the IGN fuse (See attached wiring diagram). OK: Check and repair harness and connector between integration control and panel.

For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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1. Check Blower Motor Preparation: Remove blower motor «BLOWER MOTOR»(ref-169995-S29297148882004122200000) . Check: Connect positive (+) lead connected to terminal 2 of blower motor connector, negative (-) lead to terminal 1. OK: Blower motor operates smoothly. NG: Replace blower motor. OK: Go to next step.
2. Check Harness And Connector Between Battery And Blower Motor Linear Controller, Blower Motor And Body Ground NG: Repair or replace harness or connector. OK: Go to next step.
3. Check Harness And Connector Between Blower Motor Linear Controller And Integration Control And Panel NG: Repair or replace harness or connector. OK: Go to next step.
4. Check Integration Control And Panel NG: Replace integration control and panel. OK: Replace blower motor linear controller.

For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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1. Check Voltage Between Terminal Blwc Of Integration Control And Panel Connector And Body Ground Preparation: Remove the integration control and panel with connector still connected. Check: Turn ignition switch to ON. Operate blower motor. Measure voltage between terminal BLWC of integration control and panel and body ground. OK: Voltage: 1 - 3 V OK: Go to step 3 . NG: Go to next step.
2. Check blower motor. Preparation: Remove blower motor. Check: Connect the positive (+) lead from the battery to terminal 2 of blower motor connector and the negative (-) lead to terminal 1. OK: Blower motor operates smoothly. NG: Replace blower motor. OK: Go to next step.
3. Check Voltage Between Terminal Vmc Of Integration Control And Panel And Body Ground Preparation: Remove the integration control and panel with connector still connected. Check: Turn ignition switch to ON. Operate rear A/C blower motor. Measure voltage between terminal VMC of integration control and panel and body ground, when blower switch is operated to following positions. OK: OK: Proceed to next circuit inspection shown on problem symptoms table. See «PROBLEM SYMPTOMS TABLE»(ref-170283-S41163716992005012600000) . NG: Go to next step.
4. Check power transistor. Preparation: Remove power transistor «POWER TRANSISTOR (FOR REAR A/C)»(ref-169995-S11216630602004122200000) . Check: Connect the positive (+) lead from the battery to terminal 1 through a 12 V - 3.4 W test bulb and negative (-) lead to terminal 2. Check the test bulb lights up when another positive (+) lead is connected to terminal 4 through a 12 V - 3.4 W test bulb. OK: Test bulb lights up. Check: Measure resistance between terminals 2 and 4. OK: Resistance: 2.0 - 2.4 kohm NG: Replace power transistor. OK: Go to next step.
5. Check harness and connector between power transistor and integration control and panel, power transistor and body ground. NG: Repair or replace harness or connector. OK: Check and replace Integration Control And Panel. See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-174490-S11972379492005040500000)

For complete AC system wiring diagrams, see AIR CONDITIONING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

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1. Check voltage between terminal MGC of integration control and panel and body ground Check: Start engine. Push AUTO SW. Measure voltage between terminal MGC of integration control and panel connector and body ground when A/C switch is ON and OFF. OK: OK: Go to step 5 .
2. Check Magnetic Clutch Relay Preparation: Remove magnetic clutch relay from engine room J/B. Check: Check continuity between each pair of terminals shown below of magnetic clutch relay. OK: Preparation: Apply battery positive (+) voltage between terminals 1 and 2. Check: Check continuity between terminals 3 and 5. OK: Continuity exists. NG: Replace magnetic clutch relay. OK: Go to next step.
3. Check A/C Magnetic Clutch Preparation: Disconnect magnetic clutch connector. Check: Connect positive (+) lead connected to battery to magnetic clutch connector terminal 3. OK: Magnetic clutch is energized. NG: Repair A/C magnetic clutch. OK: Go to next step.
4. Check Harness And Connector Between Magnetic Clutch Relay And Integration Control And Panel, A/C Compressor And Body Ground NG: Repair or replace harness or connector. OK: Proceed to next circuit inspection shown on problem symptoms table. See «PROBLEM SYMPTOMS TABLE»(ref-170283-S41163716992005012600000) .
5. Check Voltage Between Terminal Integration Control And Panel Connector Side And Body Ground Preparation: Disconnect integration control and panel connector. Turn ignition switch ON. Check: Check voltage between terminal AC1 of A/C control assembly harness side connector. OK: Voltage: 10 - 14 V NG: Check and replace ECM. OK: Go to next step.
6. Check Voltage Between Terminal AC1 Of Integration Control And Panel Connector And Body Ground Preparation: Remove integration control and panel with connector still connected. Start the engine and push AUTO switch. Check: Check the voltage between terminal AC1 of integration control and panel connector and body ground when magnetic clutch is ON and OFF by A/C switch. OK: NG: Check and replace integration control and panel. OK: Go to next step.
7. Check Voltage Between Terminal Act Of Integration Control And Panel And Body Ground Preparation: Remove integration control and panel with connectors still connected. Start the engine and push AUTO switch. Check: Check the voltage between terminal ACIN of A/C control assembly and body ground. OK: NG: Check and replace integration control and panel. OK: Go to next step.
8. Check Voltage Between Terminal ACT Of ECM Connector And Body Ground NG: Check and replace ECM. OK: Go to next step.
9. Check Harness And Connector Between Integration Control And Panel And ECM NG: Repair or replace harness or connector. OK: Proceed to next circuit inspection shown on problem symptoms table. See «PROBLEM SYMPTOMS TABLE»(ref-170283-S41163716992005012600000) .