B1260

Code

ALFA ROMEO B — Body

Solar radiation sensor short to ground

Brand: ALFA ROMEO

Type: B — Body

Views: UK: 20 EN: 30 RU: 24

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Damaged or chafed wiring harness with conductor contacting chassis ground
Corroded/loose connector at the solar sensor
Internal short inside the solar radiation sensor
Water ingress or contamination at connector or sensor
Poor pin contact or bent terminal in connector
Faulty HVAC/body control module or wiring connector at the module (less common)

Symptoms

Auto climate control not responding correctly to sunlight (overcooling/overheating)
Incorrect or stuck HVAC blower operation related to sun load
Warning or message related to climate control or sensor on instrument cluster (depending on model)
Stored B1260 DTC and possibly related HVAC faults
Live-data sun sensor value remains at or near zero

What to check

Read and record freeze-frame/live-data with a scan tool; confirm B1260 is current and note related codes
Visually inspect solar sensor (usually on top of dashboard under windshield) and wiring harness for damage, pinched wires or water ingress
Inspect connector for corrosion, bent pins, and proper locking
Back-probe signal, 5V reference and ground with ignition ON (engine off) using a multimeter
Check resistance between the sensor signal wire and chassis ground with ignition OFF (should be high/OL if not shorted)
Wiggle harness and connectors while watching live data to reproduce the fault

Signal parameters

Reference supply: typically +5 V reference (verify factory wiring diagram)
Signal output: ~0 to 5 V proportional to solar irradiance (at strong sun near upper range)
Short to ground condition: signal near 0 V with key on (0.0–0.5 V)
Expected resistance from signal wire to chassis ground (ign off): very high / open (>> megaohms) if no short

Diagnostic algorithm

Retrieve codes and live data with a manufacturer-level scan tool. Confirm B1260 and freeze-frame conditions. Clear codes and see if B1260 returns.
Visually inspect the sensor and harness at the dash top for damage, water intrusion, pinched wires or connector corrosion. Repair any obvious damage.
With ignition ON (engine off), back-probe the sensor connector: verify reference voltage (≈5 V) and sensor ground. If reference is missing or low, trace supply or fused feed. If reference present but signal ≈0 V, suspect short to ground or failed sensor.
With ignition OFF, measure resistance between the signal wire (at the sensor connector) and chassis ground. A low resistance indicates a short to ground in the sensor or harness. If high resistance (open), the short may be intermittent—perform wiggle test with key on while watching live data.
Disconnect the sensor connector. With key ON, check the signal wire voltage at the harness side: if the voltage rises toward the reference (or float) when sensor disconnected, the sensor is likely shorted internally. If signal remains ~0 V, short is in the wiring between harness and module—trace wiring and check grounds/connectors.
If wiring appears intact, unplug the HVAC/body control module connector and measure continuity between the signal wire and module pin to isolate section with short. Repair any chafed wiring, replace corroded connector pins or repair pinouts per wiring diagram.
Replace the solar radiation sensor if internal short is confirmed. After repair, clear codes and verify correct live-data values under sunlight and that code does not return.
If fault persists after sensor and wiring repair, inspect/replace control module connector or consult module-level diagnostics; consider module substitution only after wiring and sensor verified.
Use manufacturer wiring diagrams and connector views for pin identification and torque/specs when replacing parts.

Likely causes

Shorted signal wire to chassis ground due to wiring chafe under dash
Corroded connector causing low-resistance path to ground
Failed internal sensor electronics creating direct path to ground

Fault status

⚠️ Status

Solar radiation sensor circuit — short to ground. Fault stored by HVAC/body control module.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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Code

B1260

FIAT B — Body

Solar radiation sensor short to ground

Brand: FIAT

Type: B — Body

Views: UK: 16 EN: 27 RU: 17

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Damaged or chafed wiring harness with conductor contacting chassis ground
Corroded/loose connector at the solar sensor
Internal short inside the solar radiation sensor
Water ingress or contamination at connector or sensor
Poor pin contact or bent terminal in connector
Faulty HVAC/body control module or wiring connector at the module (less common)

Symptoms

Auto climate control not responding correctly to sunlight (overcooling/overheating)
Incorrect or stuck HVAC blower operation related to sun load
Warning or message related to climate control or sensor on instrument cluster (depending on model)
Stored B1260 DTC and possibly related HVAC faults
Live-data sun sensor value remains at or near zero

What to check

Read and record freeze-frame/live-data with a scan tool; confirm B1260 is current and note related codes
Visually inspect solar sensor (usually on top of dashboard under windshield) and wiring harness for damage, pinched wires or water ingress
Inspect connector for corrosion, bent pins, and proper locking
Back-probe signal, 5V reference and ground with ignition ON (engine off) using a multimeter
Check resistance between the sensor signal wire and chassis ground with ignition OFF (should be high/OL if not shorted)
Wiggle harness and connectors while watching live data to reproduce the fault

Signal parameters

Reference supply: typically +5 V reference (verify factory wiring diagram)
Signal output: ~0 to 5 V proportional to solar irradiance (at strong sun near upper range)
Short to ground condition: signal near 0 V with key on (0.0–0.5 V)
Expected resistance from signal wire to chassis ground (ign off): very high / open (>> megaohms) if no short

Diagnostic algorithm

Retrieve codes and live data with a manufacturer-level scan tool. Confirm B1260 and freeze-frame conditions. Clear codes and see if B1260 returns.
Visually inspect the sensor and harness at the dash top for damage, water intrusion, pinched wires or connector corrosion. Repair any obvious damage.
With ignition ON (engine off), back-probe the sensor connector: verify reference voltage (≈5 V) and sensor ground. If reference is missing or low, trace supply or fused feed. If reference present but signal ≈0 V, suspect short to ground or failed sensor.
With ignition OFF, measure resistance between the signal wire (at the sensor connector) and chassis ground. A low resistance indicates a short to ground in the sensor or harness. If high resistance (open), the short may be intermittent—perform wiggle test with key on while watching live data.
Disconnect the sensor connector. With key ON, check the signal wire voltage at the harness side: if the voltage rises toward the reference (or float) when sensor disconnected, the sensor is likely shorted internally. If signal remains ~0 V, short is in the wiring between harness and module—trace wiring and check grounds/connectors.
If wiring appears intact, unplug the HVAC/body control module connector and measure continuity between the signal wire and module pin to isolate section with short. Repair any chafed wiring, replace corroded connector pins or repair pinouts per wiring diagram.
Replace the solar radiation sensor if internal short is confirmed. After repair, clear codes and verify correct live-data values under sunlight and that code does not return.
If fault persists after sensor and wiring repair, inspect/replace control module connector or consult module-level diagnostics; consider module substitution only after wiring and sensor verified.
Use manufacturer wiring diagrams and connector views for pin identification and torque/specs when replacing parts.

Likely causes

Shorted signal wire to chassis ground due to wiring chafe under dash
Corroded connector causing low-resistance path to ground
Failed internal sensor electronics creating direct path to ground

Fault status

⚠️ Status

Solar radiation sensor circuit — short to ground. Fault stored by HVAC/body control module.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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Code

B1260

LAND ROVER B — Body

Solar radiation sensor - short circuit in the battery

Brand: LAND ROVER

Type: B — Body

Views: UK: 15 EN: 26 RU: 21

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Damaged or chafed wiring harness with conductor contacting chassis ground
Corroded/loose connector at the solar sensor
Internal short inside the solar radiation sensor
Water ingress or contamination at connector or sensor
Poor pin contact or bent terminal in connector
Faulty HVAC/body control module or wiring connector at the module (less common)

Symptoms

Auto climate control not responding correctly to sunlight (overcooling/overheating)
Incorrect or stuck HVAC blower operation related to sun load
Warning or message related to climate control or sensor on instrument cluster (depending on model)
Stored B1260 DTC and possibly related HVAC faults
Live-data sun sensor value remains at or near zero

What to check

Read and record freeze-frame/live-data with a scan tool; confirm B1260 is current and note related codes
Visually inspect solar sensor (usually on top of dashboard under windshield) and wiring harness for damage, pinched wires or water ingress
Inspect connector for corrosion, bent pins, and proper locking
Back-probe signal, 5V reference and ground with ignition ON (engine off) using a multimeter
Check resistance between the sensor signal wire and chassis ground with ignition OFF (should be high/OL if not shorted)
Wiggle harness and connectors while watching live data to reproduce the fault

Signal parameters

Reference supply: typically +5 V reference (verify factory wiring diagram)
Signal output: ~0 to 5 V proportional to solar irradiance (at strong sun near upper range)
Short to ground condition: signal near 0 V with key on (0.0–0.5 V)
Expected resistance from signal wire to chassis ground (ign off): very high / open (>> megaohms) if no short

Diagnostic algorithm

Retrieve codes and live data with a manufacturer-level scan tool. Confirm B1260 and freeze-frame conditions. Clear codes and see if B1260 returns.
Visually inspect the sensor and harness at the dash top for damage, water intrusion, pinched wires or connector corrosion. Repair any obvious damage.
With ignition ON (engine off), back-probe the sensor connector: verify reference voltage (≈5 V) and sensor ground. If reference is missing or low, trace supply or fused feed. If reference present but signal ≈0 V, suspect short to ground or failed sensor.
With ignition OFF, measure resistance between the signal wire (at the sensor connector) and chassis ground. A low resistance indicates a short to ground in the sensor or harness. If high resistance (open), the short may be intermittent—perform wiggle test with key on while watching live data.
Disconnect the sensor connector. With key ON, check the signal wire voltage at the harness side: if the voltage rises toward the reference (or float) when sensor disconnected, the sensor is likely shorted internally. If signal remains ~0 V, short is in the wiring between harness and module—trace wiring and check grounds/connectors.
If wiring appears intact, unplug the HVAC/body control module connector and measure continuity between the signal wire and module pin to isolate section with short. Repair any chafed wiring, replace corroded connector pins or repair pinouts per wiring diagram.
Replace the solar radiation sensor if internal short is confirmed. After repair, clear codes and verify correct live-data values under sunlight and that code does not return.
If fault persists after sensor and wiring repair, inspect/replace control module connector or consult module-level diagnostics; consider module substitution only after wiring and sensor verified.
Use manufacturer wiring diagrams and connector views for pin identification and torque/specs when replacing parts.

Likely causes

Shorted signal wire to chassis ground due to wiring chafe under dash
Corroded connector causing low-resistance path to ground
Failed internal sensor electronics creating direct path to ground

Fault status

⚠️ Status

Solar radiation sensor circuit — short to ground. Fault stored by HVAC/body control module.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

Repair manuals

Manual library for LAND ROVER

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Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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Code

B1260

Other B — Body

Solar Radiation Sensor Circuit Short To Battery

Brand: Other

Type: B — Body

Views: UK: 30 EN: 41 RU: 34

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Damaged or chafed wiring harness with conductor contacting chassis ground
Corroded/loose connector at the solar sensor
Internal short inside the solar radiation sensor
Water ingress or contamination at connector or sensor
Poor pin contact or bent terminal in connector
Faulty HVAC/body control module or wiring connector at the module (less common)

Symptoms

Auto climate control not responding correctly to sunlight (overcooling/overheating)
Incorrect or stuck HVAC blower operation related to sun load
Warning or message related to climate control or sensor on instrument cluster (depending on model)
Stored B1260 DTC and possibly related HVAC faults
Live-data sun sensor value remains at or near zero

What to check

Read and record freeze-frame/live-data with a scan tool; confirm B1260 is current and note related codes
Visually inspect solar sensor (usually on top of dashboard under windshield) and wiring harness for damage, pinched wires or water ingress
Inspect connector for corrosion, bent pins, and proper locking
Back-probe signal, 5V reference and ground with ignition ON (engine off) using a multimeter
Check resistance between the sensor signal wire and chassis ground with ignition OFF (should be high/OL if not shorted)
Wiggle harness and connectors while watching live data to reproduce the fault

Signal parameters

Reference supply: typically +5 V reference (verify factory wiring diagram)
Signal output: ~0 to 5 V proportional to solar irradiance (at strong sun near upper range)
Short to ground condition: signal near 0 V with key on (0.0–0.5 V)
Expected resistance from signal wire to chassis ground (ign off): very high / open (>> megaohms) if no short

Diagnostic algorithm

Retrieve codes and live data with a manufacturer-level scan tool. Confirm B1260 and freeze-frame conditions. Clear codes and see if B1260 returns.
Visually inspect the sensor and harness at the dash top for damage, water intrusion, pinched wires or connector corrosion. Repair any obvious damage.
With ignition ON (engine off), back-probe the sensor connector: verify reference voltage (≈5 V) and sensor ground. If reference is missing or low, trace supply or fused feed. If reference present but signal ≈0 V, suspect short to ground or failed sensor.
With ignition OFF, measure resistance between the signal wire (at the sensor connector) and chassis ground. A low resistance indicates a short to ground in the sensor or harness. If high resistance (open), the short may be intermittent—perform wiggle test with key on while watching live data.
Disconnect the sensor connector. With key ON, check the signal wire voltage at the harness side: if the voltage rises toward the reference (or float) when sensor disconnected, the sensor is likely shorted internally. If signal remains ~0 V, short is in the wiring between harness and module—trace wiring and check grounds/connectors.
If wiring appears intact, unplug the HVAC/body control module connector and measure continuity between the signal wire and module pin to isolate section with short. Repair any chafed wiring, replace corroded connector pins or repair pinouts per wiring diagram.
Replace the solar radiation sensor if internal short is confirmed. After repair, clear codes and verify correct live-data values under sunlight and that code does not return.
If fault persists after sensor and wiring repair, inspect/replace control module connector or consult module-level diagnostics; consider module substitution only after wiring and sensor verified.
Use manufacturer wiring diagrams and connector views for pin identification and torque/specs when replacing parts.