Code
P0360
Generic
P — Powertrain
Ignition Coil J Primary Control Circuit/Open
Views:
UK: 15
EN: 26
RU: 17
AI status
Completed
Completed
100%
Causes
- Open or short in ignition coil primary wiring (harness, broken conductor)
- Corroded, loose or damaged coil connector or terminals
- Faulty ignition coil (internal open primary winding or connector fault)
- No battery power to coil supply circuit (fused feed open)
- PCM/ignition driver transistor failure or internal open
- Poor ground at engine or chassis affecting circuit reference
Symptoms
- Malfunction indicator lamp (MIL/Check Engine) illuminated
- Cylinder-specific misfire or rough idle
- Reduced engine power, hesitation under load
- Hard starting or no-start (if multiple coils affected)
- Reduced fuel economy and increased exhaust emissions
- Possible backfire or popping on acceleration
What to check
- Read and record freeze frame/fault data with a scan tool; note whether code is continuous or intermittent
- Visual inspection of coil pack, connectors and wiring for damage, corrosion, oil or water
- Wiggle test wiring and connectors while monitoring for code set or misfire
- Check fuses and relay supplying ignition coils for continuity and output voltage
- Measure battery voltage at coil power pin with ignition ON (should be ~12 V)
- Measure coil primary resistance at coil terminals (compare to spec) and check for open
Signal parameters
- Battery supply to coil: ~11–14 V with ignition ON/cranking
- Primary coil resistance: typically ~0.3–3 Ω (manufacturer-specific — consult spec)
- Secondary coil resistance: typically ~5 kΩ–15 kΩ (if checking secondary)
- PCM driver waveform on control/ground side: switching between ~0 V (ground) and near battery voltage; pulse width varies with RPM/load
- Open circuit indicated by infinite resistance on primary winding or loss of continuity to PCM
- No switching pulses from PCM driver when command present indicates possible driver failure or open circuit
Diagnostic algorithm
- Retrieve freeze frame and any related misfire codes (P030x). Note if code is for specific cylinder mapped to coil J.
- Visually inspect coil, boot and connector for contamination, oil, corrosion, or melted insulation. Repair as needed.
- With ignition OFF, disconnect coil connector and check terminal condition. Back-probe coil harness: check for battery voltage at supply terminal with ignition ON.
- Measure coil primary resistance across the coil's primary terminals; compare to manufacturer spec. Replace coil if open or out-of-spec.
- Check continuity between the coil control pin and the PCM connector pin (power OFF). Repair any open or high-resistance wiring.
- Check for a blown fuse or open in the fused 12 V feed that supplies the coils. Restore power if found open.
- Clear code and perform a functional test: swap suspected coil with a known-good coil from another cylinder (if coil-per-cylinder design). If code/roughness follows coil, replace coil.
- If problem follows harness position after swap, repair/replace wiring or connector. If coil and wiring are good and supply present but PCM does not switch, verify PCM driver with oscilloscope or substitute known-good PCM only after confirming all wiring and coils are good.
- After repair, clear codes and test drive to confirm code does not return and misfire is resolved.
Likely causes
- Damaged or disconnected coil pack connector or wiring (most common)
- Failed ignition coil primary winding or internal connector fault
- Blown fuse or loss of 12 V supply to the coil
- Intermittent open due to corrosion or broken wire near harness flex point
- PCM output driver failed (less common)
Fault status
Status
PCM detected an open or fault in the primary control circuit for the ignition coil (coil J). The driver did not observe the expected switching/grounding of the coil primary when commanded, indicating an open, loss of supply, or driver/coil failure.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P0360
GWM
P — Powertrain
- Ignition coil primary / secondary circuit malfunction J
Views:
UK: 1
EN: 4
RU: 0
AI status
Completed
Completed
100%
Causes
- Open or short in ignition coil primary wiring (harness, broken conductor)
- Corroded, loose or damaged coil connector or terminals
- Faulty ignition coil (internal open primary winding or connector fault)
- No battery power to coil supply circuit (fused feed open)
- PCM/ignition driver transistor failure or internal open
- Poor ground at engine or chassis affecting circuit reference
Symptoms
- Malfunction indicator lamp (MIL/Check Engine) illuminated
- Cylinder-specific misfire or rough idle
- Reduced engine power, hesitation under load
- Hard starting or no-start (if multiple coils affected)
- Reduced fuel economy and increased exhaust emissions
- Possible backfire or popping on acceleration
What to check
- Read and record freeze frame/fault data with a scan tool; note whether code is continuous or intermittent
- Visual inspection of coil pack, connectors and wiring for damage, corrosion, oil or water
- Wiggle test wiring and connectors while monitoring for code set or misfire
- Check fuses and relay supplying ignition coils for continuity and output voltage
- Measure battery voltage at coil power pin with ignition ON (should be ~12 V)
- Measure coil primary resistance at coil terminals (compare to spec) and check for open
Signal parameters
- Battery supply to coil: ~11–14 V with ignition ON/cranking
- Primary coil resistance: typically ~0.3–3 Ω (manufacturer-specific — consult spec)
- Secondary coil resistance: typically ~5 kΩ–15 kΩ (if checking secondary)
- PCM driver waveform on control/ground side: switching between ~0 V (ground) and near battery voltage; pulse width varies with RPM/load
- Open circuit indicated by infinite resistance on primary winding or loss of continuity to PCM
- No switching pulses from PCM driver when command present indicates possible driver failure or open circuit
Diagnostic algorithm
- Retrieve freeze frame and any related misfire codes (P030x). Note if code is for specific cylinder mapped to coil J.
- Visually inspect coil, boot and connector for contamination, oil, corrosion, or melted insulation. Repair as needed.
- With ignition OFF, disconnect coil connector and check terminal condition. Back-probe coil harness: check for battery voltage at supply terminal with ignition ON.
- Measure coil primary resistance across the coil's primary terminals; compare to manufacturer spec. Replace coil if open or out-of-spec.
- Check continuity between the coil control pin and the PCM connector pin (power OFF). Repair any open or high-resistance wiring.
- Check for a blown fuse or open in the fused 12 V feed that supplies the coils. Restore power if found open.
- Clear code and perform a functional test: swap suspected coil with a known-good coil from another cylinder (if coil-per-cylinder design). If code/roughness follows coil, replace coil.
- If problem follows harness position after swap, repair/replace wiring or connector. If coil and wiring are good and supply present but PCM does not switch, verify PCM driver with oscilloscope or substitute known-good PCM only after confirming all wiring and coils are good.
- After repair, clear codes and test drive to confirm code does not return and misfire is resolved.
Likely causes
- Damaged or disconnected coil pack connector or wiring (most common)
- Failed ignition coil primary winding or internal connector fault
- Blown fuse or loss of 12 V supply to the coil
- Intermittent open due to corrosion or broken wire near harness flex point
- PCM output driver failed (less common)
Fault status
Status
PCM detected an open or fault in the primary control circuit for the ignition coil (coil J). The driver did not observe the expected switching/grounding of the coil primary when commanded, indicating an open, loss of supply, or driver/coil failure.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P0360
HUMMER
P — Powertrain
Ignition Coil J Primary/Secondary Circuit Malfunction
Views:
UK: 7
EN: 13
RU: 5
AI status
Completed
Completed
100%
Causes
- Open or short in ignition coil primary wiring (harness, broken conductor)
- Corroded, loose or damaged coil connector or terminals
- Faulty ignition coil (internal open primary winding or connector fault)
- No battery power to coil supply circuit (fused feed open)
- PCM/ignition driver transistor failure or internal open
- Poor ground at engine or chassis affecting circuit reference
Symptoms
- Malfunction indicator lamp (MIL/Check Engine) illuminated
- Cylinder-specific misfire or rough idle
- Reduced engine power, hesitation under load
- Hard starting or no-start (if multiple coils affected)
- Reduced fuel economy and increased exhaust emissions
- Possible backfire or popping on acceleration
What to check
- Read and record freeze frame/fault data with a scan tool; note whether code is continuous or intermittent
- Visual inspection of coil pack, connectors and wiring for damage, corrosion, oil or water
- Wiggle test wiring and connectors while monitoring for code set or misfire
- Check fuses and relay supplying ignition coils for continuity and output voltage
- Measure battery voltage at coil power pin with ignition ON (should be ~12 V)
- Measure coil primary resistance at coil terminals (compare to spec) and check for open
Signal parameters
- Battery supply to coil: ~11–14 V with ignition ON/cranking
- Primary coil resistance: typically ~0.3–3 Ω (manufacturer-specific — consult spec)
- Secondary coil resistance: typically ~5 kΩ–15 kΩ (if checking secondary)
- PCM driver waveform on control/ground side: switching between ~0 V (ground) and near battery voltage; pulse width varies with RPM/load
- Open circuit indicated by infinite resistance on primary winding or loss of continuity to PCM
- No switching pulses from PCM driver when command present indicates possible driver failure or open circuit
Diagnostic algorithm
- Retrieve freeze frame and any related misfire codes (P030x). Note if code is for specific cylinder mapped to coil J.
- Visually inspect coil, boot and connector for contamination, oil, corrosion, or melted insulation. Repair as needed.
- With ignition OFF, disconnect coil connector and check terminal condition. Back-probe coil harness: check for battery voltage at supply terminal with ignition ON.
- Measure coil primary resistance across the coil's primary terminals; compare to manufacturer spec. Replace coil if open or out-of-spec.
- Check continuity between the coil control pin and the PCM connector pin (power OFF). Repair any open or high-resistance wiring.
- Check for a blown fuse or open in the fused 12 V feed that supplies the coils. Restore power if found open.
- Clear code and perform a functional test: swap suspected coil with a known-good coil from another cylinder (if coil-per-cylinder design). If code/roughness follows coil, replace coil.
- If problem follows harness position after swap, repair/replace wiring or connector. If coil and wiring are good and supply present but PCM does not switch, verify PCM driver with oscilloscope or substitute known-good PCM only after confirming all wiring and coils are good.
- After repair, clear codes and test drive to confirm code does not return and misfire is resolved.
Likely causes
- Damaged or disconnected coil pack connector or wiring (most common)
- Failed ignition coil primary winding or internal connector fault
- Blown fuse or loss of 12 V supply to the coil
- Intermittent open due to corrosion or broken wire near harness flex point
- PCM output driver failed (less common)
Fault status
Status
PCM detected an open or fault in the primary control circuit for the ignition coil (coil J). The driver did not observe the expected switching/grounding of the coil primary when commanded, indicating an open, loss of supply, or driver/coil failure.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email