XJR (X308) V8-4.0L SC (AJ26) (1998)
2. Connect scan tool
3. Record DTC(s), freeze frame data
GO to AA2
AA2 CHECK IAT 2 SENSOR RANGE
Note: Use a refrigerator, freezer or freeze spray so that the operation of the sensor can be checked at temperatures below the ambient test
temperature.
1. Ignition switch to position 0
2. Disconnect PI003. Below air intake
3. Measure the resistance between sensor pins 1 and 2; refer to temperature/resistance relationship graph.
Relationship OK?
Yes: Go to AA3
No: Remove sensor and check for correct temperature/resistance relationship at ambient temperature. Repeat checks for at least 3 different
temperatures. Renew as necessary and test the system for normal operation.
AA3 CHECK CONTINUITY HARNESS
1. Ignition switch to position 0
2. Disconnect EM012. Inside ECM housing
3. Disconnect PI003. Below air intake
4. With EM012 and PI003 disconnected, measure the resistance between EM012/007 and PI003/002.
Is the resistance less than 0.5 Ohms?
Yes: Go to AA4
No: Inspect harness/connector EM012, PI003 and PI001. Repair as necessary and test the system for normal operation.
AA4 CHECK CONTINUITY HARNESS