Gauge Control Module Input Test
WARNING: This page is about a different car, the 2009 Acura MDX, 2008 Acura MDX, and 2007 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Before testing the gauge control module, troubleshoot the multiplex integrated control unit first, using B-CAN System Diagnosis Test Mode A (see
TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A
).
- Turn the ignition switch to LOCK (0), and remove the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).
- Disconnect gauge control module connectors A (12P) and B (24P).NOTE: All connector views are wire side of female terminals.
- Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary and recheck the system.
- If the terminals look OK, go to step 4.
- With the connectors still disconnected, make these input tests at the connectors.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, go to step 5.GAUGE CONTROL MODULE INPUT
Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained A5 BLK Under-dash fuse/relay box connector N (45P) disconnected Check for continuity between the A5 and the under-dash fuse/relay box connector N (45P) No. 22 terminal:
There should be continuity.An open in the wire A6 RED PCM connector A (49P) disconnect Check for continuity between the A6 and the PCM connector A (49P) No. 1 terminal:
There should be continuity.An open in the wire A12 WHT PCM connector A (49P) disconnected Check for continuity between the A12 and the PCM connector A (49P) No. 36 terminal:
There should be continuity.An open in the wire
- Reconnect the connectors, turn the ignition switch ON (II), and make these input tests at the connectors.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, replace the gauge control module.GAUGE CONTROL MODULE INPUT
Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained A2 BLK Under all conditions Measure the voltage to ground:
There should be less than 0.5 V.- Poor ground(G501)
- An open in the wire
B13 A1 WHT Under all conditions Measure the voltage to ground:
There should be battery voltage.- Blown No. 4 (40 A) fuse in the main under-hood fuse box
- Blown No. 7 (10 A) fuse in the under-dash fuse/relay box
- Faulty under-dash fuse/relay box
- An open in the wire
A7 YEL Ignition switch ON (II) Measure the voltage to ground:
There should be battery voltage.- Blown No. 21 (7.5 A) fuse in the main under-dash fuse/relay box
- Faulty under-dash fuse/relay box
- An open in the wire
B9 ORN Ignition switch ON (II), brake fluid is full level in the reservoir Measure the voltage to ground:
There should be 5 V or more.- Faulty brake fluid level switch
- A short to ground in the wire
Ignition switch ON (II), brake fluid is lower level in the reservoir Measure the voltage to ground:
There should be less than 1 V.- Poor ground(G302)
- An open in the wire
- Faulty brake fluid level switch
B10 ORN Ignition switch ON (II), parking brake pedal pressed Measure the voltage to ground:
There should be less than 1 V.- Faulty brake fluid level switch
- An open in the wire
Ignition switch ON (II), parking brake pedal released Measure the voltage to ground:
There should be 5 V or more.- Faulty brake fluid level switch
- A short to ground in the wire
B24 BLU Ignition switch ON (II), washer fluid is half or more in the washer reservoir Measure the voltage to ground:
There should be less than 1 V.- Poor ground(G201)
- Faulty washer fluid level switch
- An open in the wire
Ignition switch ON (II), washer fluid is half or more in the washer reservoir Measure the voltage to ground:
There should be 5 V or more.- Faulty washer fluid level switch
- A short to ground in the wire