Troubleshooting: Diagnosis Kia Optima II рестайлинг

DTC INDEX

DIAGNOSTIC CODE DEFINITIONS

Scheme 89

DTC Detecting Condition

DTC DETECTING CONDITION CHART

Terminal And Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found? YES: Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S33441514852010032300000) " procedure. NO: Go to " «SIGNAL CIRCUIT INSPECTION»(ref-357508-S02442959512010032300000) " procedure.

Scheme 90

1. Check for open in harness. Ignition "OFF" Disconnect Humidity Sensor. Measure resistance between terminal "3" of Humidity Sensor and terminal "4" of A/C Control Unit. Specification: Approx. 0 ohms Is the measured resistance within specifications? YES: Go to " «GROUND CIRCUIT INSPECTION»(ref-357508-S14303190912010032300000) " procedure. NO: Check for open in harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S33441514852010032300000) " procedure.

Scheme 91

1. Check for open in ground harness. Ignition "OFF" Disconnect Humidity Sensor. Measure resistance between terminal "2" of Humidity Sensor and terminal "12" of A/C Control Unit. Specification: Approx. 0 ohms Is the measured resistance within specifications? YES: Go to " «COMPONENT INSPECTION»(ref-357508-S11903194312010032300000) " procedure. NO: Check for open in ground harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S33441514852010032300000) " procedure.

Scheme 92

Scheme 93

Scheme 94

Scheme 95

1. Check Humidity Sensor. Engine "ON" Connect Humidity Sensor. Measure Frequency between terminal "3" and "2" of Humidity sensor while increasing humidity. Specification: Refer the specifications in (Scheme 94). Is the measured frequency within specifications? (tolerance limits ± 5%). (Scheme 92) YES: Go to step 2. NO: Substitute with a known-good Humidity sensor and check for proper operation. If the problem is corrected, replace Humidity sensor and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S33441514852010032300000) " procedure.
2. Check A/C Control Unit Engine "ON" Disconnect Humidity Sensor. Measure voltage value between terminal "4" of A/C control unit and chassis ground. Specification: 5V Is the measured voltage within specification? YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S33441514852010032300000) " procedure. NO: Substitute with a known-good A/C Control Unit and check for proper operation. If the problem is corrected, replace A/C Control Unit and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S33441514852010032300000) " procedure.

DTC DETECTING CONDITION CHART

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found? YES: Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S11504695782010032300000) " procedure. NO: Go to " «SIGNAL CIRCUIT INSPECTION»(ref-357508-S16334746732010032300000) " procedure.

Scheme 96

1. Check for short to ground in harness. Ignition "OFF" Disconnect Humidity Sensor. Measure resistance between terminal "3" of Humidity Sensor and chassis ground. Specification: Approx. infinity ohms Is the measured resistance within specifications? YES: Go to " «POWER CIRCUIT INSPECTION»(ref-357508-S00071055192010032300000) " procedure. NO: Check for short to ground in harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S11504695782010032300000) " procedure.

Scheme 97

1. Check for open in power harness. Ignition "ON" Disconnect Humidity Sensor. Measure voltage value between terminal "5" of Humidity Sensor and chassis ground. Specification: 5V Is the measured voltage within specifications? YES: Go to " «COMPONENT INSPECTION»(ref-357508-S42453152332010032300000) " procedure. NO: Check for open in power harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S11504695782010032300000) " procedure.

Scheme 98

Scheme 99

Scheme 100

1. Check Humidity Sensor. Engine "ON" Connect Humidity Sensor. Measure Frequency between terminal "3" and "2" of Humidity sensor while increasing humidity. Specification: (Scheme 98) Is the measured frequency within specifications in (Scheme 92)? (tolerance limits ± 5%) YES: Go to step 2. NO: Substitute with a known-good Humidity sensor and check for proper operation. If the problem is corrected, replace Humidity sensor and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S11504695782010032300000) " procedure.
2. Check A/C Control Unit Engine "ON" Disconnect Humidity Sensor. Measure voltage value between terminal "4" of A/C control unit and chassis ground. Specification: 5V Is the measured voltage within specification? YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S11504695782010032300000) " procedure. NO: Substitute with a known-good A/C Control Unit and check for proper operation. If the problem is corrected, replace A/C Control Unit and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S11504695782010032300000) " procedure.

DTC DETECTING CONDITION CHART

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found? YES: Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S37580455642010032300000) " procedure. NO: Go to " «SIGNAL CIRCUIT INSPECTION»(ref-357508-S01273394412010032300000) " procedure.

Scheme 101

1. Check for open in harness. Ignition "OFF" Disconnect water temp. sensor. Measure resistance between terminal "1" of water temp. sensor and terminal "7" of A/C Control Unit. Specification: Approx. 0 ohms Is the measured resistance within specifications? YES: Go to " «GROUND CIRCUIT INSPECTION»(ref-357508-S15905348872010032300000) " procedure. NO: Check for open in harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S37580455642010032300000) " procedure.

Scheme 102

1. Check for open in ground harness. Ignition "OFF" Disconnect water temp. sensor. Measure resistance between terminal "2" of water temp. sensor and chassis ground. Specification: Approx. 0 ohms Is the measured resistance within specifications? YES: Go to " «COMPONENT INSPECTION»(ref-357508-S03580555932010032300000) " procedure. NO: Check for open in ground harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S37580455642010032300000) " procedure.

Scheme 103

Scheme 104

1. Check water temp. sensor. Ignition "OFF" Disconnect water temp. sensor. Measure resistance between terminal "1" and "2" of water temp. sensor. Specification: (Scheme 103) Is the measured resistance within specifications in (Scheme 90))? (tolerance limits ± 3%) YES: Go to step 2. NO: Substitute with a known-good water temp. sensor and check for proper operation. If the problem is corrected, replace water temp. sensor and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S37580455642010032300000) " procedure.
2. Check A/C Control Unit Engine "ON" Disconnect water temp. sensor. Measure Voltage between terminal "7" of A/C Control Unit and chassis ground. Specification: Approx. 5V Is the measured voltage within specifications? YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S37580455642010032300000) " procedure. NO: Substitute with a known-good A/C Control Unit and check for proper operation. If the problem is corrected, replace A/C Control Unit and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S37580455642010032300000) " procedure.

DTC DETECTING CONDITION CHART

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found? YES: Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S36298963642010032300000) " procedure. NO: Go to " «SIGNAL CIRCUIT INSPECTION»(ref-357508-S41863840452010032300000) " procedure.

Scheme 105

1. Check for short to ground in harness. Ignition "OFF" Disconnect water temp. sensor. Measure resistance between terminal "1" of water temp. sensor and chassis ground. Specification: Approx. infinityohms Is the measured resistance within specifications? YES: Go to " «COMPONENT INSPECTION»(ref-357508-S16331173392010032300000) " procedure. NO: Check for short to ground in harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S36298963642010032300000) " procedure.

Scheme 106

Scheme 107

1. Check water temp. sensor. Ignition "OFF" Disconnect water temp. sensor. Measure resistance between terminal "1" and "2" of water temp. sensor. Specification: (Scheme 106) Is the measured resistance within specifications in (Scheme 90))? (tolerance limits ± 3%) YES: Go to step 2. NO: Substitute with a known-good water temp. sensor and check for proper operation. If the problem is corrected, replace water temp. sensor and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S36298963642010032300000) " procedure.
2. Check A/C Control Unit Engine "ON" Disconnect water temp. sensor. Measure Voltage between terminal "7" of A/C Control Unit and chassis ground. Specification: Approx. 5V Is the measured voltage within specifications? YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S36298963642010032300000) " procedure. NO: Substitute with a known-good A/C Control Unit and check for proper operation. If the problem is corrected, replace A/C Control Unit and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S36298963642010032300000) " procedure.

DTC DETECTING CONDITION CHART

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found? YES: Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S12828372912010032300000) " procedure. NO: Go to " «SIGNAL CIRCUIT INSPECTION»(ref-357508-S31373778202010032300000) " procedure.

Scheme 108

Scheme 109

1. Check for open in harness. Ignition "OFF" Disconnect Intake potentiometer. Measure resistance between terminal "6" of Intake Potentiometer and terminal "24" of A/C control unit. Specification: Approx. 0 ohms Is the measured resistance within specifications? YES: Go to step 2 . NO: Check for open in signal harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S12828372912010032300000) " procedure.
2. Check for short to ground in harness. Ignition "OFF" Disconnect Intake potentiometer. Measure resistance between terminal "6" of Intake Potentiometer and chassis ground. Specification: Approx. infinity ohms Is the measured resistance within specifications? YES: Go to " «POWER CIRCUIT INSPECTION»(ref-357508-S38372055362010032300000) " procedure. NO: Check for short to ground in signal harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S12828372912010032300000) " procedure.

Scheme 110

1. Check for short or open in harness. Ignition "ON" Connect Intake Potentiometer. Measure voltage between terminal "5" of Intake Potentiometer and chassis ground. Specification: Approx. 5V Is the measured voltage within specifications? YES: Go to " «COMPONENT INSPECTION»(ref-357508-S27881835672010032300000) " procedure. NO: Check for short or open in power harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S12828372912010032300000) " procedure.

Scheme 111

Scheme 112

1. Check actuator motor. Ignition "OFF" Disconnect Intake Potentiometer. Verify that the temperature actuator operates to the fresh position when connecting 12V to the terminal "3" and grounding terminal "4". Verify that the temperature actuator operates to the recirculation position when the connections are reversed. Does the actuator work properly? YES: Go to step 2 . NO: Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S12828372912010032300000) " procedure.
2. Check potentiometer Ignition "ON" Connect Intake potentiometer. Measure voltage between terminal "7" and "6" of Intake potentiometer while operating Intake switch. Specification: Refer to the «SPECIFICATIONS»(ref-357508-S42112583582010032300000) VOLTAGE SPECIFICATION Door position Voltage (6-7) Error detecting Fresh 0.3 ± 0.15V Low voltage: 0.08V or less Recirculation 4.7 ± 0.15V High voltage: 4.9V or more Specifications: Voltage value of Intake potentiometer as a function of position of Intake. Is the measured voltage within specifications? YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S12828372912010032300000) " procedure. NO: Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S12828372912010032300000) " procedure.

DTC DETECTING CONDITION CHART

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found? YES: Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S13025308732010032300000) " procedure. NO: Go to " «SIGNAL CIRCUIT INSPECTION»(ref-357508-S37609780322010032300000) " procedure.

Scheme 113

1. Check for short in harness. Ignition "OFF" Disconnect Intake potentiometer. Measure resistance between terminal "6" and "5" of Intake potentiometer. Specification: Approx. infinity ohms Is the measured resistance within specifications? YES: Go to " «GROUND CIRCUIT INSPECTION»(ref-357508-S40260096902010032300000) " procedure. NO: Check for short to power harness in signal harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S13025308732010032300000) " procedure.

Scheme 114

1. Check for open in harness. Ignition "OFF" Disconnect Intake Potentiometer. Measure resistance between terminal "7" of Intake Potentiometer and chassis ground. Specification: Approx. 0 ohms Is the measured resistance within specifications? YES: Go to " «COMPONENT INSPECTION»(ref-357508-S09822649242010032300000) " procedure. NO: Check for open in ground harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S13025308732010032300000) " procedure.

Scheme 115

Scheme 116

1. Check actuator motor. Ignition "OFF" Disconnect Intake Potentiometer. Verify that the temperature actuator operates to the fresh position when connecting 12V to the terminal "3" and grounding terminal "4". Verify that the temperature actuator operates to the recirculation position when the connections are reversed. Does the actuator work properly? YES: Go to step 2 . NO: Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S13025308732010032300000) " procedure.
2. Check potentiometer Ignition "ON" Connect Intake potentiometer. Measure voltage between terminal "7" and "6" of Intake potentiometer while operating Intake switch. Specification: Refer to the «SPECIFICATIONS»(ref-357508-S42112583582010032300000) VOLTAGE SPECIFICATION Door position Voltage (6-7) Error detecting Fresh 0.3 ± 0.15V Low voltage: 0.08V or less Recirculation 4.7 ± 0.15V High voltage: 4.9V or more Specifications: Voltage value of Intake potentiometer as a function of position of Intake. Is the measured voltage within specifications? YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S13025308732010032300000) " procedure. NO: Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S13025308732010032300000) " procedure.

DTC DETECTING CONDITION CHART

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found? YES: Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S38579956332010032300000) " procedure. NO: Go to " «SIGNAL CIRCUIT INSPECTION»(ref-357508-S18825184532010032300000) " procedure.

Scheme 117

1. Check for short to ground in harness. Ignition "OFF" Disconnect in-car sensor. Measure resistance between terminal "4" of in-car sensor and chassis ground. Specification: Approx. infinityohms Is the measured resistance within specifications? YES: Go to " «COMPONENT INSPECTION»(ref-357508-S20630766562010032300000) " procedure. NO: Check for short to ground in harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S38579956332010032300000) " procedure.

Scheme 118

Scheme 119

Scheme 120

1. Check in-car temp. sensor. Ignition "OFF" Disconnect in-car sensor. Measure resistance between terminal "4" and "2" of in-car sensor. Specification: Refer the specifications in (Scheme 119). Is the measured resistance within specifications in (Scheme 90)? (tolerance limits ± 3%) YES: Go to step 2. NO: Substitute with a known-good in-car sensor and check for proper operation. If the problem is corrected, replace in-car sensor and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S38579956332010032300000) " procedure.
2. Check A/C Control Unit Engine "ON" Disconnect in-car sensor. Measure Voltage between terminal "5" of A/C Control Unit and chassis ground. Specification: Approx. 5V Is the measured voltage within specifications? YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S38579956332010032300000) " procedure. NO: Substitute with a known-good A/C Control Unit and check for proper operation. If the problem is corrected, replace A/C Control Unit and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S38579956332010032300000) " procedure.

DTC DETECTING CONDITION CHART

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found? YES: Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S22526139592010032300000) " procedure. NO: Go to " «SIGNAL CIRCUIT INSPECTION»(ref-357508-S27601098612010032300000) " procedure.

Scheme 121

1. Check for open in harness. Ignition "OFF" Disconnect in-car temp. sensor. Measure resistance between terminal "4" of in-car temp. sensor and terminal "5" of A/C Control Unit. Specification: Approx. 0 ohms Is the measured resistance within specifications? YES: Go to " «GROUND CIRCUIT INSPECTION»(ref-357508-S28287908062010032300000) " procedure. NO: Check for open in harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S22526139592010032300000) " procedure.

Scheme 122

1. Check for open in ground harness. Ignition "OFF" Disconnect in-car temp. sensor. Measure resistance between terminal "2" of in-car temp. sensor and terminal "12" of A/C Control Unit. Specification: Approx. 0 ohms Is the measured resistance within specifications? YES: Go to " «COMPONENT INSPECTION»(ref-357508-S04677172492010032300000) " procedure. NO: Check for open in ground harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S22526139592010032300000) " procedure.

Scheme 123

Scheme 124

Scheme 125

1. Check in-car temp. sensor. Ignition "OFF" Disconnect in-car sensor. Measure resistance between terminal "4" and "2" of in-car sensor. Specification: Refer the specifications in (Scheme 123). Is the measured resistance within specifications? (tolerance limits ± 3%). (Scheme 124) YES: Go to step 2. NO: Substitute with a known-good in-car sensor and check for proper operation. If the problem is corrected, replace in-car sensor and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S22526139592010032300000) " procedure.
2. Check A/C Control Unit Engine "ON" Disconnect in-car sensor. Measure Voltage between terminal "5" of A/C Control Unit and chassis ground. Specification: Approx. 5V Is the measured voltage within specifications? YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S22526139592010032300000) " procedure. NO: Substitute with a known-good A/C Control Unit and check for proper operation. If the problem is corrected, replace A/C Control Unit and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S22526139592010032300000) " procedure.

DTC DETECTING CONDITION CHART

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found? YES: Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S41815717962010032300000) " procedure. NO: Go to " «SIGNAL CIRCUIT INSPECTION»(ref-357508-S24228776222010032300000) " procedure.

Scheme 126

1. Check for short to ground in harness. Ignition "OFF" Disconnect ambient temp. sensor. Measure resistance between terminal "1" of ambient temp. sensor and chassis ground. Specification: Approx. infinityohms Is the measured resistance within specifications? YES: Go to " «COMPONENT INSPECTION»(ref-357508-S24079208982010032300000) " procedure. NO: Check for short to ground in harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S41815717962010032300000) " procedure.

Scheme 127

Scheme 128

Scheme 129

1. Check Ambient temp. sensor. Ignition "OFF" Disconnect ambient temp. sensor. Measure resistance between terminal "1" and "2" of ambient temp. sensor. Specification: Refer the specifications in (Scheme 127). Is the measured resistance within specifications? (tolerance limits ±3%). (Scheme 128) YES: Go to step 2. NO: Substitute with a known-good ambient temp. sensor and check for proper operation. If the problem is corrected, replace ambient temp. sensor and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S41815717962010032300000) " procedure.
2. Check A/C Control Unit Engine "ON" Disconnect ambient temp. sensor. Measure voltage between terminal "3" of A/C Control Unit and chassis ground. Specification: Approx. 5V Is the measured voltage within specifications? YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S41815717962010032300000) " procedure. NO: Substitute with a known-good A/C Control Unit and check for proper operation. If the problem is corrected, replace A/C Control Unit and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S41815717962010032300000) " procedure.

DTC DETECTING CONDITION CHART

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found? YES: Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S20592275342010032300000) " procedure. NO: Go to " «SIGNAL CIRCUIT INSPECTION»(ref-357508-S42825055072010032300000) " procedure.

Scheme 130

1. Check for open in harness. Ignition "OFF" Disconnect ambient temp. sensor. Measure resistance between terminal "1" of ambient temp. sensor and terminal "3" of A/C Control Unit. Specification: Approx. 0 ohms Is the measured resistance within specifications? YES: Go to " «GROUND CIRCUIT INSPECTION»(ref-357508-S12883687322010032300000) " procedure. NO: Check for open in harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S20592275342010032300000) " procedure.

Scheme 131

1. Check for open in ground harness. Ignition "OFF" Disconnect ambient temp. sensor. Measure resistance between terminal "2" of ambient temp. sensor and chassis ground. Specification: Approx. 0 ohms Is the measured resistance within specifications? YES: Go to " «COMPONENT INSPECTION»(ref-357508-S15899293672010032300000) " procedure. NO: Check for open in ground harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S20592275342010032300000) " procedure.

Scheme 132

Scheme 133

Scheme 134

1. Check Ambient temp. sensor. Ignition "OFF" Disconnect ambient temp. sensor. Measure resistance between terminal "1" and "2" of ambient temp. sensor. Specification: Refer the specifications in (Scheme 133). Is the measured resistance within specifications? (tolerance limits ±3%). (Scheme 133) YES: Go to step 2. NO: Substitute with a known-good ambient temp. sensor and check for proper operation. If the problem is corrected, replace ambient temp. sensor and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S20592275342010032300000) " procedure.
2. Check A/C Control Unit Engine "ON" Disconnect ambient temp. sensor. Measure voltage between terminal "3" of A/C Control Unit and chassis ground. Specification: Approx. 5V Is the measured voltage within specifications? YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S20592275342010032300000) " procedure. NO: Substitute with a known-good A/C Control Unit and check for proper operation. If the problem is corrected, replace A/C Control Unit and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S20592275342010032300000) " procedure.

DTC DETECTING CONDITION CHART

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found? YES: Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S39741136092010032300000) " procedure. NO: Go to " «SIGNAL CIRCUIT INSPECTION»(ref-357508-S33150068612010032300000) " procedure.

Signal Circuit Inspection

1. Check for short to ground in harness. Ignition "OFF" Disconnect evaporator temp. sensor. Measure resistance between terminal "1" of evaporator temp. sensor and chassis ground. Specification: Approx. infinityohms Is the measured resistance within specifications? YES: Go to " «COMPONENT INSPECTION»(ref-357508-S23711506472010032300000) " procedure. NO: Check for short to ground in harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S39741136092010032300000) " procedure.

Scheme 135

Scheme 136

Scheme 137

1. Check evaporator temp. sensor. Ignition "OFF" Disconnect evaporator temp. sensor. Measure resistance between terminal "1" and "2" of evaporator temp. sensor. Specification: Refer the specifications in (Scheme 137). Is the measured resistance within specifications? (tolerance limits ±3%). (Scheme 137) YES: Go to step 2. NO: Substitute with a known-good evaporator temp. sensor and check for proper operation. If the problem is corrected, replace evaporator temp. sensor and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S39741136092010032300000) " procedure.
2. Check A/C Control Unit Engine "ON" Disconnect evaporator temp. sensor. Measure voltage between terminal "6" of A/C Control Unit and chassis ground. Specification: Approx. 5V Is the measured voltage within specifications? YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S39741136092010032300000) " procedure. NO: Substitute with a known-good A/C Control Unit and check for proper operation. If the problem is corrected, replace A/C Control Unit and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S39741136092010032300000) " procedure.

DTC DETECTING CONDITION CHART

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found? YES: Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S38152016462010032300000) " procedure. NO: Go to " «SIGNAL CIRCUIT INSPECTION»(ref-357508-S41188152582010032300000) " procedure.

Scheme 138

1. Check for open in harness. Ignition "OFF" Disconnect evaporator temp. sensor. Measure resistance between terminal "1" of evaporator temp. sensor and terminal "6" of A/C Control Unit. Specification: Approx. 0 ohms Is the measured resistance within specifications? YES: Go to " «GROUND CIRCUIT INSPECTION»(ref-357508-S37108259522010032300000) " procedure. NO: Check for open in harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S38152016462010032300000) " procedure.

Scheme 139

1. Check for open in ground harness. Ignition "OFF" Disconnect evaporator temp. sensor. Measure resistance between terminal "2" of evaporator temp. sensor and chassis ground. Specification: Approx. 0 ohms Is the measured resistance within specifications? YES: Go to " «COMPONENT INSPECTION»(ref-357508-S12687735542010032300000) " procedure. NO: Check for open in harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S38152016462010032300000) " procedure.

Scheme 140

Scheme 141

Scheme 142

1. Check evaporator temp. sensor. Ignition "OFF" Disconnect evaporator temp. sensor. Measure resistance between terminal "1" and "2" of evaporator temp. sensor. Specification: Refer the specifications in (Scheme 142). Is the measured resistance within specifications? (tolerance limits ±3%). (Scheme 142) YES: Go to step 2. NO: Substitute with a known-good evaporator temp. sensor and check for proper operation. If the problem is corrected, replace evaporator temp. sensor and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S38152016462010032300000) " procedure.
2. Check A/C Control Unit Engine "ON" Disconnect evaporator temp. sensor. Measure voltage between terminal "6" of A/C Control Unit and chassis ground. Specification: Approx. 5V Is the measured voltage within specifications? YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S38152016462010032300000) " procedure. NO: Substitute with a known-good A/C Control Unit and check for proper operation. If the problem is corrected, replace A/C Control Unit and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S38152016462010032300000) " procedure.

DTC DETECTING CONDITION CHART

Scheme 143

Scheme 144

1. Connect scan tool to Data Link Connector (DLC).
2. Engine "ON"
3. Monitor the "Driver Air Mix Potentiometer" Parameter on the Scan Tool while operating temp. switch.
4. Are the DTC B1245 present and is parameter of "Driver Air Mix Potentiometer" fixed? Parameter of "Driver Air Mix Potentiometer" will be fixed at 100%(or any value above 90%), or 0% (or any value below 10%), if there is any fault in Driver Air Mix potentiometer. YES: Go to appropriate Inspection procedure. NO: Fault is intermittent caused by poor contact in the sensor's and/or A/C controller's connector or was repaired and A/C controller memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S35038827602010032300000) " procedure.

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found? YES: Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S35038827602010032300000) " procedure. NO: Go to " «SIGNAL CIRCUIT INSPECTION»(ref-357508-S34140616972010032300000) " procedure.

Scheme 145

Scheme 146

1. Check for open in harness. Ignition "OFF" Disconnect Driver Air Mix potentiometer. Measure resistance between terminal "6" of Driver Air Mix Potentiometer and terminal "18" of A/C control unit. Specification: Approx. 0 ohms Is the measured resistance within specifications? YES: Go to step 2 . NO: Check for open in signal harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S35038827602010032300000) " procedure.
2. Check for short to ground in harness. Ignition "OFF" Disconnect Driver Air Mix potentiometer. Measure resistance between terminal "6" of Driver Air Mix Potentiometer and chassis ground. Specification: Approx. infinity ohms Is the measured resistance within specifications? YES: Go to " «POWER CIRCUIT INSPECTION»(ref-357508-S14280781612010032300000) " procedure. NO: Check for short to ground in signal harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S35038827602010032300000) " procedure.

Scheme 147

1. Check for short or open in harness. Ignition "ON" Connect Driver Air Mix Potentiometer. Measure voltage between terminal "7" of Driver Air Mix Potentiometer and chassis ground. Specification: Approx. 5V Is the measured voltage within specifications? YES: Go to " «COMPONENT INSPECTION»(ref-357508-S05610449172010032300000) " procedure. NO: Check for short or open in power harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S35038827602010032300000) " procedure.

Scheme 148

Scheme 149

Scheme 150

1. Check actuator motor. Ignition "OFF" Disconnect Driver Air Mix Potentiometer. Verify that the temperature actuator operates to the hot position when connecting 12V to the terminal "3" and grounding terminal "4". Verify that the temperature actuator operates to the cool position when the connections are reversed. Does the actuator work properly? YES: Go to step 2. NO: Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S35038827602010032300000) " procedure.
2. Check potentiometer Ignition "ON" Connect Driver Air Mix potentiometer. Measure voltage between terminal "6" and "7" of Driver Air Mix potentiometer while operating the temp. switch. Specification: Refer the specifications in see scheme 87 ) VOLTAGE SPECIFICATION Door position Voltage (6-7) Error detecting MAX. Cooling 0.3 ± 0.15V Low voltage: 0.08V or less MAX. Heating 4.7 ± 0.15V High voltage: 4.9V or more Is the measured voltage within specifications. see scheme 87 YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S35038827602010032300000) " procedure. NO: Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S35038827602010032300000) " procedure.

DTC DETECTING CONDITION CHART

Scheme 151

Scheme 152

1. Connect scan tool to Data Link Connector (DLC).
2. Engine "ON"
3. Monitor the "Driver Air Mix Potentiometer" Parameter on the Scan Tool while operating temp. switch.
4. Are the DTC B1246 present and is parameter of "Driver Air Mix potentiometer" fixed? Parameter of "Driver Air Mix potentiometer" will be fixed at 100%(or any value above 90%), or 0% (or any value below 10%), if there is any fault in Driver Air Mix potentiometer. YES: Go to appropriate Inspection procedure. NO: Fault is intermittent caused by poor contact in the sensor's and/or A/C controller's connector or was repaired and A/C controller memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S32310609742010032300000) " procedure.

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found? YES: Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S32310609742010032300000) " procedure. NO: Go to " «SIGNAL CIRCUIT INSPECTION»(ref-357508-S09338394582010032300000) " procedure.

Scheme 153

1. Check for short in harness. Ignition "OFF" Disconnect Driver Air Mix potentiometer. Measure resistance between terminal "6" and "5" of Driver Air Mix potentiometer. Specification: Approx. infinity ohms Is the measured resistance within specifications? YES: Go to " «GROUND CIRCUIT INSPECTION»(ref-357508-S12452558702010032300000) " procedure. NO: Check for short to power harness in signal harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S32310609742010032300000) " procedure.

Scheme 154

1. Check for open in harness. Ignition "OFF" Disconnect Driver Air Mix Potentiometer. Measure resistance between terminal "7" of Driver Air Mix Potentiometer and chassis ground. Specification: Approx. 0 ohms Is the measured resistance within specifications? YES: Go to " «COMPONENT INSPECTION»(ref-357508-S08639496932010032300000) " procedure. NO: Check for open in ground harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S32310609742010032300000) " procedure.

Scheme 155

Scheme 156

Scheme 157

1. Check actuator motor. Ignition "OFF" Disconnect Driver Air Mix Potentiometer. Verify that the temperature actuator operates to the hot position when connecting 12V to the terminal "3" and grounding terminal "4". Verify that the temperature actuator operates to the cool position when the connections are reversed. Does the actuator work properly? YES: Go to step 2. NO: Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S32310609742010032300000) " procedure.
2. Check potentiometer Ignition "ON" Connect Driver Air Mix potentiometer. Measure voltage between terminal "6" and "7" of Driver Air Mix potentiometer while operating the temp. switch. Specification: Refer the specifications in see scheme 95 ) VOLTAGE SPECIFICATION Door Position Voltage (6-7) Error Detecting MAX. Cooling 0.3 ± 0.15V Low voltage: 0.08V or less MAX. Heating 4.7 ± 0.15V High voltage: 4.9V or more Is the measured voltage within specifications. See «VOLTAGE SPECIFICATION»(ref-357508-S10177029002010032300000)? YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S32310609742010032300000) " procedure. NO: Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S32310609742010032300000) " procedure.

DTC DETECTING CONDITION CHART

Scheme 158

Scheme 159

1. Connect scan tool to Data Link Connector (DLC).
2. Engine "ON"
3. Monitor the "DR. DIRECTION POTENTIO." parameter on the scan tool while operating mode switch.
4. Are the DTC B1249 present and is parameter of "DR. DIRECTION POTENTIO." fixed? Parameter of "DR. DIRECTION POTENTIO." will be fixed at 100%(or any value above 90%), or 0% (or any value below 10%), if there is any fault in Driver Direction potentiometer. YES: Go to appropriate Inspection procedure. NO: Fault is intermittent caused by poor contact in the sensor's and/or A/C controller's connector or was repaired and A/C controller memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S31019765352010032300000) " procedure.

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found? YES: Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S31019765352010032300000) " procedure. NO: Go to " «SIGNAL CIRCUIT INSPECTION»(ref-357508-S04002319172010032300000) " procedure.

Scheme 160

Scheme 161

1. Check for open in harness. Ignition "OFF" Disconnect Driver mode Actuator. Measure resistance between terminal "6" of Driver Direction potentiometer and terminal "21" of A/C control unit. Specification: Approx. 0 ohms Is the measured resistance within specifications? YES: Go to step 2 . NO: Check for open in signal harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S31019765352010032300000) " procedure.
2. Check for short to ground in harness. Ignition "OFF" Disconnect Driver mode Actuator. Measure resistance between terminal "6" of Driver Direction potentiometer and chassis ground. Specification: Approx. infinity ohms Is the measured resistance within specifications? YES: Go to " «POWER CIRCUIT INSPECTION»(ref-357508-S39686389552010032300000) " procedure. NO: Check for short to ground in signal harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S31019765352010032300000) " procedure.

Scheme 162

1. Check for short or open in harness. Ignition "ON" Connect Driver Direction potentiometer. Measure voltage between terminal "5" of Driver Direction potentiometer and chassis ground. Specification: Approx. 5V Is the measured voltage within specifications? YES: Go to " «COMPONENT INSPECTION»(ref-357508-S35294906092010032300000) " procedure. NO: Check for short or open in power harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S31019765352010032300000) " procedure.

Scheme 163

Scheme 164

Scheme 165

1. Check actuator. Ignition "OFF" Disconnect Driver Direction potentiometer. Verify that the mode actuator operates to the vent mode when connecting 12V to the terminal "3" and grounding terminal "4". Verify that the mode actuator operates to the def mode when the connections are reversed. Does the actuator work properly? YES: Go to step 2. NO: Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S31019765352010032300000) " procedure.
2. Check potentiometer Ignition "ON" Connect Driver Direction potentiometer. Measure voltage between terminal "7" and "6" of Driver Direction potentiometer as the mode switch is operated. Specification: Refer the specifications in see scheme 104 Is the measured voltage within specifications. see scheme 104 YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S31019765352010032300000) " procedure. NO: Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S31019765352010032300000) " procedure.

DTC DETECTING CONDITION CHART

Scheme 166

Scheme 167

1. Connect scan tool to Data Link Connector (DLC).
2. Engine "ON"
3. Monitor the "DIRECTION POTENTIO" parameter on the scan tool while operating mode switch.
4. Are the DTC B1250 present and is parameter of "DIRECTION POTENTIO." fixed? Parameter of "DIRECTION POTENTIO." will be fixed at 100%(or any value above 90%), or 0% (or any value below 10%), if there is any fault in Driver Direction potentiometer. YES: Go to appropriate Inspection procedure. NO: Fault is intermittent caused by poor contact in the sensor's and/or A/C controller's connector or was repaired and A/C controller memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S01258799342010032300000) " procedure.

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found? YES: Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S01258799342010032300000) " procedure. NO: Go to " «SIGNAL CIRCUIT INSPECTION»(ref-357508-S29867634402010032300000) " procedure.

Scheme 168

1. Check for short in harness. Ignition "OFF" Disconnect Driver mode Actuator. Measure resistance between terminal "6" and "5" of Driver Direction potentiometer. Specification: Approx. infinity ohms Is the measured resistance within specifications? YES: Go to " «GROUND CIRCUIT INSPECTION»(ref-357508-S20593970652010032300000) " procedure. NO: Check for open in signal harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S01258799342010032300000) " procedure.

Scheme 169

1. Check for open in ground harness. Ignition "OFF" Disconnect Driver mode Actuator. Measure resistance between terminal "7" of evaporator sensor and chassis ground. Specification: Approx. 0 ohms Is the measured resistance within specifications? YES: Go to " «Component Inspection»(ref-357508-S21726277972010032300000) " procedure. NO: Check for open in ground harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S01258799342010032300000) " procedure.

Scheme 170

Scheme 171

Scheme 172

1. Check actuator. Ignition "OFF" Disconnect Driver Direction potentiometer. Verify that the mode actuator operates to the vent mode when connecting 12V to the terminal "3" and grounding terminal "4". Verify that the mode actuator operates to the def mode when the connections are reversed. Does the actuator work properly? YES: Go to step 2. NO: Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S01258799342010032300000) " procedure.
2. Check potentiometer Ignition "ON" Connect Driver Direction potentiometer. Measure voltage between terminal "7" and "6" of Driver Direction potentiometer as the mode switch is operated. Specification: Refer the specifications in see scheme 112 Is the measured voltage within specifications. see scheme 112 YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S01258799342010032300000) " procedure. NO: Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S01258799342010032300000) " procedure.

DTC DETECTING CONDITION CHART

Scheme 173

Scheme 174

1. Connect scan tool to Data Link Connector (DLC).
2. Engine "ON"
3. Monitor the "Driver Air Mix Potentiometer" Parameter on the Scan Tool while operating temp. switch.
4. Are the DTC B2406 present and is parameter of "Driver AIR MIX Potentiometer" fixed? There is any fault in Driver AIR MIX Motor. If the parameter of "Driver AIR MIX DOOR" is 30% or less when the actuator operates to the hot position, or If the parameter is 60% and more when the actuator operates to the cold position. YES: Go to appropriate Inspection procedure. NO: Fault is intermittent caused by poor contact in the sensor's and/or A/C controller's connector or was repaired and A/C controller memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S09226582932010032300000) " procedure.

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found? YES: Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S09226582932010032300000) " procedure. NO: Go to " «SIGNAL CIRCUIT INSPECTION»(ref-357508-S14619106552010032300000) " procedure.

Scheme 175

Scheme 176

1. Check for open in harness. Ignition "OFF" Disconnect Driver Air Mix potentiometer. Measure resistance between terminal "3,4" of Driver Air Mix Motor and terminal "16,17" of A/C control unit. Specification: Approx. 0 ohms Is the measured resistance within specifications? YES: Go to step 2 . NO: Check for open in signal harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S09226582932010032300000) " procedure.
2. Check for short to ground in harness. Ignition "OFF" Disconnect Driver Air Mix Actuator. Measure resistance between terminal "3,4" of Driver Air Mix Motor and chassis ground. Specification: Approx. infinity ohms Is the measured resistance within specifications? YES: Go to " «VISUAL/PHYSICAL INSPECTION»(ref-357508-S30739763852010032300000) " procedure. NO: Check for short to ground in signal harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S09226582932010032300000) " procedure.

Scheme 177

1. Check actuator. Check if Driver Air Mix Actuator works properly through ACTUATION TEST. Ignition: ON Connect Scan Tool and select "ACTUATION TEST" mode and press [F1] Does Driver Air Mix Actuator work properly? YES: Go to " «COMPONENT INSPECTION»(ref-357508-S31234071662010032300000) " procedure. NO: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S09226582932010032300000) " procedure.

Scheme 178

Scheme 179

Scheme 180

Scheme 181

1. Check actuator motor. Ignition "OFF" Disconnect Driver Air Mix Potentiometer. Verify that the temperature actuator operates to the hot position when connecting 12V to the terminal "3" and grounding terminal "4". Verify that the temperature actuator operates to the cool position when the connections are reversed. Does the actuator work properly? YES: Go to step 2. NO: Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S09226582932010032300000) " procedure.
2. Check potentiometer Ignition "ON" Connect Driver Air Mix potentiometer. Measure voltage between terminal "5" and "6" of Driver Air Mix potentiometer while operating the temp. switch. Specification: Refer the specifications in (Scheme 181). VOLTAGE SPECIFICATION Door Position Voltage (3-4) Error Detecting MAX. Cooling 0.3 ± 0.15V Low voltage: 0.08V or less MAX. Heating 4.7 ± 0.15V High voltage: 4.9V or more Is the measured voltage within specifications? See «VOLTAGE SPECIFICATION»(ref-357508-S03199323352010032300000). YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S09226582932010032300000) " procedure. NO: Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S09226582932010032300000) " procedure.
3. Check A/C Control Unit. Engine "ON" Connect A/C Control Unit. Measure voltage between terminal "16" and "17" of A/C Control Unit while operating the temp. switch. Specification: Approx. 12V Is the measured voltage within specifications? YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S09226582932010032300000) " procedure. NO: Substitute with a known-good A/C Control Unit and check for proper operation. If the problem is corrected, replace A/C Control Unit and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S09226582932010032300000) " procedure.

DTC DETECTING CONDITION CHART

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found? YES: Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S39630249902010032300000) " procedure. NO: Go to " «SIGNAL CIRCUIT INSPECTION»(ref-357508-S26686381942010032300000) " procedure.

Scheme 182

Scheme 183

1. Check for open in harness. Ignition "OFF" Disconnect Intake potentiometer. Measure resistance between terminal "3,4" of Intake potentiometer and terminal "22,23" of A/C control unit. Specification: Approx. 0 ohms Is the measured resistance within specifications? YES: Go to step 2 . NO: Check for open in signal harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S39630249902010032300000) " procedure.
2. Check for short to ground in harness. Ignition "OFF" Disconnect Driver Air Mix Actuator. Measure resistance between terminal "3,4" of Driver Air Mix Motor and chassis ground. Specification: Approx. infinity ohms Is the measured resistance within specifications? YES: Go to " «VISUAL/PHYSICAL INSPECTION»(ref-357508-S22868815382010032300000) " procedure. NO: Check for short to ground in signal harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S39630249902010032300000) " procedure.

Scheme 184

1. Check actuator. Check if Driver Air Mix Actuator works properly through ACTUATION TEST. Ignition: ON Connect Scan Tool and select "ACTUATION TEST" mode and press [F1] Does Intake Actuator work properly? YES: Go to " «COMPONENT INSPECTION»(ref-357508-S33436431352010032300000) " procedure. NO: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S39630249902010032300000) " procedure.

Scheme 185

Scheme 186

Scheme 187

1. Check actuator motor. Ignition "OFF" Disconnect Intake Potentiometer. Verify that the temperature actuator operates to the fresh position when connecting 12V to the terminal "3" and grounding terminal "4". Verify that the temperature actuator operates to the recirculation position when the connections are reversed. Does the actuator work properly? YES: Go to step 2 . NO: Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S39630249902010032300000) " procedure.
2. Check potentiometer Ignition "ON" Connect Intake potentiometer. Measure voltage between terminal "7" and "6" of Intake potentiometer while operating Intake switch. Specification: Refer the specifications. See «VOLTAGE SPECIFICATION»(ref-357508-S02865795282010032300000) . VOLTAGE SPECIFICATION Door position Voltage (6-7) Error detecting Fresh 0.3 ± 0.15V Low voltage: 0.08V or less Recirculation 4.7 ± 0.15V High voltage: 4.9V or more Specifications: Voltage value of Intake potentiometer as a function of position of Intake. Is the measured voltage within specifications? YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S39630249902010032300000) " procedure. NO: Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S39630249902010032300000) " procedure.
3. Check A/C Control Unit. Engine "ON" Connect A/C Control Unit. Measure voltage between terminal "22" and "23" of A/C Control Unit while operating the Intake switch. Specification: Approx. 12V Is the measured voltage within specifications? YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S39630249902010032300000) " procedure. NO: Substitute with a known-good A/C Control Unit and check for proper operation. If the problem is corrected, replace A/C Control Unit and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S39630249902010032300000) " procedure.

DTC DETECTING CONDITION CHART

Scheme 188

Scheme 189

1. Connect scan tool to Data Link Connector (DLC).
2. Engine "ON"
3. Monitor the "DR DIRECTION POTENTIO" parameter on the scan tool while operating mode switch.
4. Are the DTC B2409 present and is parameter of "Driver DIRECTION POTENTIO." fixed? There is any fault in Driver Direction Motor. If the parameter of "Driver DIRECTION POTENTIO." is 10% or less on "VENT" mode, or If the parameter is 90% or more on "DEF" mode. YES: Go to appropriate Inspection procedure. NO: Fault is intermittent caused by poor contact in the sensor's and/or A/C controller's connector or was repaired and A/C controller memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S03759074452010032300000) " procedure.

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found? YES: Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S03759074452010032300000) " procedure. NO: Go to " «SIGNAL CIRCUIT INSPECTION»(ref-357508-S28150094822010032300000) " procedure.

Scheme 190

Scheme 191

1. Check for open in harness. Ignition "OFF" Disconnect Driver mode Actuator. Measure resistance between terminal "3,4" of Driver Direction Motor and terminal "19,20" of A/C control unit. Specification: Approx. 0 ohms Is the measured resistance within specifications? YES: Go to step 2 . NO: Check for open in signal harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S03759074452010032300000) " procedure.
2. Check for short to ground in harness. Ignition "OFF" Disconnect Driver mode Actuator. Measure resistance between terminal "3,4" of Driver Direction Motor and chassis ground. Specification: Approx. infinity ohms Is the measured resistance within specifications? YES: Go to " «VISUAL/PHYSICAL INSPECTION»(ref-357508-S14751915452010032300000) " procedure. NO: Check for short to ground in signal harness. Repair as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S03759074452010032300000) " procedure.

Scheme 192

1. Check actuator. Check if Driver Direction Actuator works properly through ACTUATION TEST. Ignition: ON Connect Scan Tool and select "ACTUATION TEST" mode and press [F1] Does Driver Direction Actuator work properly? YES: Go to " «COMPONENT INSPECTION»(ref-357508-S09136869162010032300000) " procedure. NO: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S03759074452010032300000) " procedure.

Scheme 193

Scheme 194

Scheme 195

Scheme 196

1. Check actuator. Ignition "OFF" Disconnect Driver Direction potentiometer. Verify that the mode actuator operates to the vent mode when connecting 12V to the terminal "3" and grounding terminal "4". Verify that the mode actuator operates to the def mode when the connections are reversed. Does the actuator work properly? YES: Go to step 2. NO: Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S03759074452010032300000) " procedure.
2. Check potentiometer Ignition "ON" Connect Driver Direction potentiometer. Measure voltage between terminal "7" and "6" of Driver Direction potentiometer as the mode switch is operated. Specification: Refer the specifications in (Scheme 195). VOLTAGE SPECIFICATION Door position Voltage (6-7) Error detecting VENT 0.3 ± 0.15V Under voltage: 0.08V or less Over voltage: 4.92V or more BI-LEVEL(1) 1.35 ± 0.4V BI-LEVEL(2) 2.25 ± 0.4V FLOOR 3.0 ± 0.4V MIX 3.6 ± 0.4V DEF 4.7 ± 0.15V Is the measured voltage within specifications? YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S03759074452010032300000) " procedure. NO: Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S03759074452010032300000) " procedure.
3. Check A/C Control Unit. Engine: "ON" Connect A/C Control Unit. Measure voltage between terminal "19" and "20" of A/C Control Unit while operating the mode switch. Specification: Approx. 12V Is the measured voltage within specifications? YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S03759074452010032300000) " procedure. NO: Substitute with a known-good A/C Control Unit and check for proper operation. If the problem is corrected, replace A/C Control Unit and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-357508-S03759074452010032300000) " procedure.