DTC Troubleshooting: P1879 (32-1) (L12A/L13A CVT)
DTC Troubleshooting: P1879 (32-1)
| DTC P1879: | Problem in CVT Start Clutch Pressure Control Valve Circuit |
NOTE: Record all freeze data and review General Troubleshooting Information before you troubleshoot.
| 1. | Disconnect CVT start clutch pressure control valve connector. |
| 2. | Measure the resistance between connector terminals at the control valve connector.
 CVT START CLUTCH PRESSURECONTROL VALVE CONNECTORTerminal side of male terminals Is the resistance 3.8-6.8 W? YES - Go to 3. NO - Faulty the CVT start clutch pressure control valve, replace the control valve body.n |
| 3. | Disconnect PCM connectors B (24P) and C (22P). |
| 4. | Check for continuity between PCM connector terminal B16 and body ground, and between terminal C8 and body ground.
 PCM CONNECTORSB (24P)C (22P)SCLS+ (YEL)Wire side of female terminalsSCLS- (PNK/BLU)Is there continuity? YES - Repair short to ground in the wire between PCM connector terminal B16 and the CVT start clutch pressure control valve connector, and between terminal C8 and the CVT start clutch pressure control valve connector.n NO - Go to 5. |
| 5. | Reconnect CVT start clutch pressure control valve connector. |
| 6. | Measure the resistance between PCM connector terminals B16 and C8.
 PCM CONNECTORSB (24P)C (22P)SCLS+ (YEL)Wire side of female terminalsSCLS- (PNK/BLU)Is the resistance 3.8-6.8 W? YES - Update the PCM if it does not have the latest software, or subsutitute a known-good PCM, then recheck. If the symptom/ indication goes away with a known-good PCM, replace the original PCM.n NO - Repair loose terminal or open in the wires between PCM connector terminals B16 and C8, and the CVT start clutch pressure control valve connector.n |