P1104

: DTC P1104; MASS AIR FLOW (MAF) SENSOR GROUND MALFUNCTION

G258127t80 : CHECK THE MAF SENSOR GROUND
1. Disconnect the MAF sensor electrical connector, PI14.
2. Turn the ignition switch to the ON position.
3. Measure the resistance between PI14, pin 02 (BK) and GROUND.

- Is the resistance greater than 5 ohms?

-> Yes

-> No
INSTALL a new MAF sensor. CLEAR the DTC. TEST the system for normal operation.

G258127t81 : CHECK THE MAF SENSOR GROUND CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the battery negative terminal.
2. Disconnect the ECM electrical connector, PI01.
3. Measure the resistance between PI14, pin 02 (BK) and PI01, pins 45 and 46 (BK).

- Is either resistance greater than 5 ohms?

-> Yes
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

-> No

G258127t82 : CHECK THE MAF SENSOR GROUND CIRCUIT FOR SHORT TO HIGH VOLTAGE
1. Reconnect the battery negative terminal.
2. Turn the ignition switch to the ON position.
3. Measure the voltage between PI14, pin 02 (BK) and GROUND.

- Is the voltage greater than 3 volts?

-> Yes
REPAIR the short circuit. CLEAR the DTC. TEST the system for normal operation.

-> No
Contact dealer technical support for advice on possible ECM failure.