DTC B1972: Low Power Output Fault: Testing
Turn ignition switch to OFF position. Disconnect PZM connectors. Remove PZM fuse (10-amp) located in trunk compartment fuse block. Using DVOM, measure resistance between PZM Brown 32-pin connector C2, terminal C2 (Orange wire) and ground. If resistance is 5 ohms or less, repair short to ground in Orange wire between trunk compartment fuse block and PZM. If resistance is greater than 5 ohms, replace PZM. See REMOVAL & INSTALLATION.