Pinpoint Test 3: DTC B1890 - PAD Warning Lamp Circuit Short To battery
-
PINPOINT TEST 3: DTC B1890 - PAD WARNING LAMP CIRCUIT SHORT TO BATTERY
Normal Operation
When the ignition is in the ON position, the passenger air bag deactivation (PAD) indicator prove-out period is initiated by the restraints control module (RCM). The RCM briefly activates the PAD indicator to verify to the occupants correct functional operation of the PAD indicator. See Description and Operation.
During the PAD prove-out period, if the RCM detects a short to battery on the PAD indicator circuit, it will store DTC B1890 in memory and send a message to the instrument cluster module to illuminate the air bag warning indicator.
- DTC B1890 (PAD Warning Lamp Circuit Short to Battery) - Sets if the RCM detects a short to battery on the PAD indicator circuit, it will set this DTC.
Possible Causes
- Wiring, terminals or connectors
- PAD indicator
- RCM
Diagnostic Procedure
WARNING: Do not handle, move or change the original horizontal mounting position of the restraints control module (RCM) while the RCM is connected and the ignition switch is ON. Failure to follow this instruction may result in the accidental deployment of the safety canopy and cause serious personal injury or death.
WARNING: Never probe the electrical connectors on air bag, safety canopy or side air curtain modules. Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.
CAUTION: Use the correct probe adapter(s) when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
NOTE: The supplemental restraint system (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.
Step 1-Step 2:
Step 3-Step 4:
